TDK Power Supply FPS1000 12 User Manual
FPS SERIES 1000W In 1U  
Front End Power Supplies  
INSTRUCTION MANUAL  
This Manual Cover Models:  
FPS1000-12  
FPS1000-32  
FPS1000-24  
FPS1000-48  
FPS-S1U 19” Rack Single Output  
FPS-T1U 19” Rack Triple Output  
DWG NO: IA599-04-02-A  
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FPS1000 SERIES  
INSTRUCTION MANUAL  
DWG NO: IA599-04-02 A  
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TABLE OF CONTENTS  
Warranty .................................................................................................................................Pg. 1  
FPS1000, FPS-S1U and FPS-T1U rack Safety instructions ................................................. Pg. 2  
FPS1000 Power Supply  
Chapter 1: FPS1000 Series Specifications ............................................................................ Pg. 4  
Chapter 2: FPS1000 Series Outline drawings ........................................................................Pg. 5  
Chapter 3: FPS1000 Series Installation instructions ..............................................................Pg. 7  
Chapter 4: Functions and features .......................................................................................Pg. 11  
Chapter 5: Basic connections for operation .........................................................................Pg. 14  
Chapter 6: Parallel and Series operation .............................................................................Pg. 16  
Chapter 7: I2C BUS Interface option ....................................................................................Pg. 19  
Chapter 8: FPS1000 Maintenance ......................................................................................Pg. 23  
FPS-S1U rack  
Chapter 9: FPS-S1U rack Specifications .............................................................................Pg. 25  
Chapter 10: FPS-S1U rack Installation instructions .............................................................Pg. 26  
Chapter 11: FPS-S1U and FPS-S1U/P Outline drawings ....................................................Pg. 30  
Chapter 12: Basic connections for operation .......................................................................Pg. 32  
Chapter 13: Parallel and Series operation ...........................................................................Pg. 34  
Chapter 14: FPS-S1U I2C BUS Interface option ..................................................................Pg. 37  
Chapter 15: FPS-S1U rack Maintenance .............................................................................Pg. 38  
FPS-T1U rack  
Chapter 16: FPS-T1U rack Specifications ............................................................................Pg. 40  
Chapter 17: FPS-T1U rack Installation instructions .............................................................Pg. 41  
Chapter 18: FPS-T1U and FPS-T1U/P Outline drawings ....................................................Pg. 45  
Chapter 19: Basic connections for operation .......................................................................Pg. 47  
Chapter 20: Parallel and Series operation ...........................................................................Pg. 49  
Chapter 21: FPS-T1U I2C BUS Interface option ..................................................................Pg. 51  
Chapter 22: FPS-T1U rack Maintenance .............................................................................Pg. 52  
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FPS1000 Instruction Manual  
WARRANTY  
This Densei-Lambda product is warranted against defects in materials and workmanship for a period of  
two years from date of shipment.  
During the warranty period , Densei-Lambda will, at it's option, either repair or replace products which  
prove to be defective.  
LIMITATION OF WARRANTY  
The warranty shall not apply to defects resulting from improper or inadequate usage or maintenance by  
the buyer, buyer supplied products or interfacing. The warranty shall not apply to defects resulting from  
unauthorized modifications or from operation exceeding the environmental specifications of the product  
or if the Warranty seal has been removed or altered by anyone other than Densei-Lambda authorized  
personnel.  
Densei-Lambda does not warrant the buyers circuitry or malfunctions of Densei- Lambda products resulting  
from the buyer's circuitry. Furthermore, Densei-Lambda does not warrant any damage occurring as a  
result of the buyer's circuitry or the buyer's-supplied products.  
No other warranty is expressed or implied.  
WARRANTY SERVICE  
This product must be returned to an authorized Densei-Lambda service facility for repairs or other warranty  
service. For products returned to Densei-Lambda for warranty service, the buyer shall prepay shipping  
charges to Densei-Lambda and Densei-Lambda shall pay the shipping charges to return the product to  
the buyer.  
DISCLAIMER  
The information contained in this document is subject to change without notice.  
Densei-Lambda shall not be liable for errors contained in this document or for incidental or consequential  
damages in connection with the furnishing, performance, or use of this material. No part of this document  
may be photo-copied, reproduced or translated to another language without prior written consent of Densei-  
Lambda.  
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FPS1000 POWER SUPPLY AND FPS-S1U RACK SAFETY INSTRUCTIONS  
IMPORTANT SAFETY INSTRUCTIONS  
Operating personnel must not remove the FPS1000, FPS-S1U and the FPS-T1U cover.  
No internal adjustment or component replacement is allowed by non Densei-Lambda qualified service personnel. Never  
replace components with power cable connected. To avoid injuries,always disconnect power, discharge circuits and remove  
external voltage sources before touching components. These products are not authorized for use as critical components  
in nuclear control systems, life support systems or equipment for use in hazardous environments without the express written  
approval of the managing director of Densei-Lambda.  
Restricted Access Area: The equipment should only be installed in a Restricted Access Area.  
Access should be available to service personnel only.  
WICHTIGE SICHERHEITSHINWEISE  
Bedienungspersonal oder Anwender duerfen die Gehaeuseabdeckung des FPS1000, FPS-S1U und desFPS-T1U nicht entfernen.  
Ersatzteiltausch - und Aenderungen duerfen nur von autorisiertem Densei-Lambda SERVICE-Personen bzw. Organisationen  
durchgefuehrt werden. Vor Austausch von Bauteilen ist das Netzkabel bzw. die Versorgungsspannung zu trennen.  
Energieversorgungsanschluesse sind immer zu trennen, um Personenverletzungen durch gefaehrliche Energieinhalte und  
Spannungen auszuschliessen.  
Die Stromkreise sind zu entladen, externe Spannungsquellen sind zu entfernen bevor Bauteile bzw. Komponenten getauscht  
werden.  
Der direkte Zugriff auf das Racksystem ist nur dem geschulten Service-Personal erlaubt.  
SAFETY APPROVALS  
UL60950-1, UL Recognized, C-UL for canada. IEC/EN60950-1. CE marking, when applied to the FPS1000, FPS-S1U and  
the FPS-T1U products, indicates compliance with the Low Voltage Directive (73/23EEC) as modified by the CE Marking  
Directive (93/68EEC) in that it complies with EN60950-1.  
SAFETY-CLASS OF INSULATION  
The FPS1000, FPS-S1U and the FPS-T1U are designed for the following safety parameters: Material group IIIa, Pollution  
degree 2, Overvoltage category II, Class I (earthed), indoor use as part of an overall equipment such that the FPS product  
is accessible to service personnel only.  
GROUNDING  
These products are Safety Class I instruments. To minimize shock hazard, the instruments chassis must be connected to  
an electrical ground. The instruments must be connected to the AC power supply mains through a three conductor power  
cable, with the ground wire firmly connected to an electrical ground (safety ground) at the power outlet.  
For instruments designed to be hard-wired to the supply mains, the protective earth terminal must be connected to the  
safety electrical ground before any other connection is made.  
Any interruption of the protective ground conductor, or disconnection of the protective earth terminal will cause a potential  
shock hazard that might cause personal injury.  
INPUT RATINGS  
Do not use AC supply which exceeds the input voltage and frequency rating of these instruments. The input voltage and  
frequency rating is: 100-240V~ , 50/60Hz. For safety reasons, the mains supply voltage flactuations should not exceed +/-  
10% of nominal voltage.  
FPS-S1U RACK AC INPUT  
CAUTION:  
Risk of electrical shock and energy hazard. Disconnecting one power supply disconnects only one power supply  
module. To isolate the unit completely, disconnect all power supplies.  
ACHTUNG:  
Spannungsfuehrende Teile - Gefahr durch elektrischen Schlag order hohe Energieinhalte.  
Alle Netzstecker der einzelnen Komponenten bzw. der Einschuebe muessen getrennt werden, damit das System  
“spannungsfrei” ist.  
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FPS1000 Instruction Manual  
ATTENTION:  
Risque de choc et de danger e'lectriques. Le de'branchement d'une seule alimenttation stabilise'e ne de'branche uniquement  
qu'un module "Alimentation Stabilise'e".  
Pour isoler completement le module en cause, il faut de'brancher toutes les alimentations stabilise'es.  
SAFETY SYMBOLS  
CAUTION Risk of Electrical Shock.  
Instruction manual symbol. The instrument will be marked with this symbol when it is  
necessary for the user to refer to the instruction manual.  
Indicates hazardous voltage.  
Indicates ground terminal.  
Protective Ground Conductor Terminal  
Denotes hazard. An attention to a procedure is called. Not following the procedure correctly  
could result in personal injury. A WARNING sign should not be skipped and all indicated  
conditions must be fully understood and met.  
Denotes hazard. An attention to a procedure is called. Not following the procedure correctly  
could result in damage to the equipment.  
ENERGY HAZARD  
The FPS1000, FPS-S1U and the FPS-T1U products are capable of providing hazardous energy.  
Manufacturers final equipment must provide protection to service personnel against inadvertent contact with these models  
output terminals. If set such that hazardous energy can occur then the output terminals or connections therefore must not  
be user accessible.  
OVERCURRENT PROTECTION:  
A readily accessible Listed branch circuit overcurrent protective device rated 20 A must be incorporated in the building wiring.  
SERIAL OPERATION  
The FPS-T1U product is capable of providing hazardous voltage output in case of the serial connection of two or more FPS1000  
units in the rack. Manufacturers final equipment must provide protection to service personnel against inadvertent contact with  
these models output terminals. If set such that hazardous voltage can occur then the output terminals or connections therefore  
FUSES  
There are no user replaceable fuses in the FPS1000, FPS-S1U and the FPS-T1U products. Internal fuses are sized for fault  
protection and if a fuse was opened it would indicate that service is required. Fuse replacement should be made by qualified  
technical personnel.  
FPS-S1U and FPS-T1U racks contains no fuses. FPS1000 fuses rating are described below.  
F101: F20A H 250Vac  
F102: 6.3A 400Vdc  
SICHERHEITSHINWEISE  
Vor Anschluss an die Netzversorgung ist die Aufstellanleitung zu beachten!  
1. Absicherung: F101: F20A H 250VAC, F102: 6.3A 400VDC  
2. Der maximale Ableitstrom der Gesamtanlage darf 3.5mA nicht ueberschreiten.  
3. Die Gehaeuseabdeckung darf nur im stromlosen Zustand geoeffnet werden.  
ACHTUNG:  
Sicherungen duerfen nur durch geschulte Service Personen getauscht werden.  
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CHAPTER 1 FPS1000 SERIES SPECIFICATIONS  
FPS1000 SERIES SPECIFICATIONS  
FPS1000-12  
FPS1000-24  
FPS1000-32  
FPS1000-48  
1
2
3
4
5
6
7
8
9
Rated output voltage  
Output voltage set point  
Output voltage range  
Maximum Output Current (Refer to Fig.1)  
Maximum output power  
Input voltage / frequency range  
Maximum input current (at 100/200Vac)  
Power Factor (Typ)  
V
V
V
12  
12+/-1%  
10.5~13.2  
72  
24  
24+/-1%  
21.5~29  
40  
32  
32+/-1%  
28.8~38.4  
31  
48  
48+/-1%  
43~58  
21  
A
W
---  
A
---  
%
A
mS  
---  
---  
864  
960  
992  
1008  
(*1)  
85~265Vac continuous, 47~63Hz, Single phase  
12.0/6.0  
>0.98 at 115/230V and maximum output power  
Efficiency (Typ)  
(*2)  
(*3)  
81/83%  
84/86%  
84/86%  
Less than 40A  
20mS typical at 100Vac input, rated output voltage and less than 80% of rated load.  
85/88%  
10 Inrush current  
11 Hold-up time  
12 Maximum line regulation  
13 Max load regulation  
14 Output Ripple and noise pk-pk  
15 Temperature stability  
16 Temperature coefficient  
17 Remote sensing  
(*5)  
(*6)  
0.40%  
0.80%  
(*4) mV  
---  
150  
200  
250  
300  
0.05% of rated Vout for 8hrs after 30min warm-up. Constant line, load and temperature.  
200  
PPM/°C  
V
---  
---  
---  
V
---  
---  
---  
---  
---  
---  
---  
---  
---  
---  
(*7)  
(*9)  
Possible. Refer to Instruction Manual.  
Possible. Refer to Instruction Manual.  
Possible. Refer to Instruction Manual.  
105~125% of maximum output current. Refer to Fig. 1  
18 Parallel operation  
19 Series operation  
20 Over current protection  
21 Over voltage protection  
22 Over temperature protection  
23 Remote On/Off control  
24 DC OK signal  
25 Over-Temp. warning  
26 AC fail signal  
27 Auxiliary power supply  
28 Vout voltage trimming  
29 Front panel indicators  
30 I2C Interface  
31 Operating temperature-models without IEC inlet  
models with IEC inlet  
32 Storage temperature  
33 Operating humidity  
34 Storage humidity  
35 Cooling  
(*8)  
14.3~15.7  
31~34  
41.5~45.5  
62~66  
Inverter shut down method, automatic reset.  
By electrical signal or dry contact. ON: 0~0.6V or short. OFF: 2~15V or open.  
Open collector signal. On when Vout>80+/-5% rated output. Max.sink current: 10mA  
Open collector signal. Refer to Instruction Manual  
Open collector signal. Refer to Instruction Manual  
11.2~12.5VDC. 0.25A Maximum output current.  
Possible, via Vout Trim pin in the I/O connector. Refer to Instruction Manual.  
AC OK, DC OK, DC FAIL  
Optional. Refer to Instruction Manual.  
0~50°C: 100% load. Derate 2%/°C, 50°C to 60°C, Derate 2.5%/°C, 60°C to 70°C.  
---  
---  
---  
---  
---  
---  
---  
---  
---  
---  
---  
0~50°C: 100% load. Derate 2%/°C, 50°C to 60°C.  
-30~85°C  
10~90% RH, no condensation.  
10~95% RH, no condensation.  
By internal Fans. Variable speed control.  
Built to meet ETS 300 019  
36 Vibration  
37 Shock  
38 Conducted emission  
39 Radiated emission  
40 Applicable safety standards  
Withstand voltage  
41  
Built to meet ETS 300 019  
EN55022B, FCC part 15J-B, VCCI-B  
EN55022B, FCC part 15J-B, VCCI-B  
UL60950-1, EN60950-1  
(*10)  
Input-Output: 3000Vrms, 1min. Input-Ground: 2000Vrms, 1min. Output-Ground:  
500Vrms,1min.  
42 Insulation resistance  
43 Leakage current  
44 Weight (Typ)  
---  
mA  
Kg  
---  
More than 100Mohm at 25°C and 70% RH. Output-Ground: 500Vdc  
Less Than 1.1mA at 230Vac  
2.0  
45 Size (W*H*D)  
127x41x290mm. Refer to Outline Drawing.  
Notes:  
*1: For cases where conformance to various safety standards (UL, EN etc.) is required,  
to be described as 100-240Vac (50/60Hz).  
*2: At 100/200Vac, rated load and 25˚C ambient temperature.  
*3: Not applicable for the noise filter inrush current less than 0.2mS.  
*4: Measured with JEITA RC-9131A 1:1 probe, 20MHz B.W.  
*5: From 85~132Vac or 170~265Vac, constant load.  
*6: From No-load to Rated load, constant input voltage. Measured at the sensing point in Remote sense.  
*7: Remote sensing can compensate up to 1V drop on each load wire.  
*8: Inverter shut down method. Reset by AC voltage recycle or by On/Off control.  
*9: Derate Maximum output power by 10% for input voltage less than 100VRMS  
*10 For FPS 1000-12/P(S), when used not with FPS-S1U or FPS-T1U  
racks, an EMI suppressor clamp should be attached to the AC cable,  
as close as possible to the AC inlet, to meet class B.  
.
Vout (V)  
V2  
V1  
Model  
V1 (V)  
V2 (V)  
I1 (A)  
I2 (A)  
FPS1000 FPS1000 FPS1000 FPS1000  
V/I  
-12  
12  
-24  
24  
29  
33  
40  
-32  
32  
-48  
48  
13.2  
66  
72  
38.4  
26  
31  
58  
17.25  
21  
Iout (A)  
I2  
I1  
Fig. 1: Rated output current vs output voltage  
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FPS1000 Instruction Manual  
CHAPTER 2 OUTLINE DRAWINGS  
1.2 FPS 1000 SERIES OUTLINE DRAWINGS  
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2.2 FPS 1000/P SERIES OUTLINE DRAWINGS  
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FPS1000 Instruction Manual  
CHAPTER 3  
3.1 GENERAL  
FPS1000 POWER SUPPLY INSTALLATION  
This chapter contains instructions for initial inspection, preparation for use and repackaging forshipment.  
NOTE  
FPS1000 power supplies series generate magnetic field  
which might affect the operation of other instruments.  
If your equipment is susceptible to magnetic fields, do  
not position it adjacent to the FPS1000 unit.  
3.2 PREPARATION FOR USE  
In order to be operational the power supply must be connected to an appropriate AC source.  
The AC source voltage should be within the power supply specification. Do not apply power before reading  
sections 3.6 and 3.7.  
Table 3-1 below describes the basic setup procedure. Follow the instructions in Table 3-1 in the sequence  
given to prepare the power supply for use.  
Step no  
Item  
Inspection  
Installation  
Description  
Reference  
Section 3.3  
Section 3.4  
Section 3.5  
Section 3.6  
Section 3.7  
1
2
Initial physical inspection of the power supply  
Installing the power supply.  
Ensuring adequate ventilation.  
AC source requirements  
Wire size selection. Local / Remote  
sensing. Single or multiple loads.  
3
4
AC source  
Load connection  
Table 3-1: Basic setup procedure  
3.3 INITIAL INSPECTION  
Prior to shipment this power supply was inspected and found free of mechanical or electrical defects.  
Upon unpacking of the power supply, inspect for any damage which may have occurred in transit.  
The inspection should confirm that there is no exterior damage to the power supply.  
Keep all packing material until the inspection has been completed. If damage is detected , file a claim with  
carrier immediately and notify the Lambda sales or service facility nearest you.  
3.4 FPS1000 MOUNTING  
The FPS1000 power supplies series is designed to fit in the FPS-S1U and FPS-T1U, 19" rack, or in an  
equivalent rack designed for the FPS1000 power supply.  
The FPS1000 is secured to the rack using the spring lock device, located at the FPS1000 front panel.  
Refer to the FPS1000 and the FPS-S1U and FPS-T1U outline drawings in Chapter 2, Chapter 11 and  
Chapter 18.  
When installation using mounting screws is required, the FPS1000 can be secured to the equipment using  
the M3 mounting holes at its bottom surface. Refer to the FPS1000 outline drawings.  
3.5 LOCATION MOUNTING AND COOLING  
This power supply is fan cooled. The air intake is at the front panel and the exhaust is at the rear panel.  
Upon installation allow cooling air to reach the front panel ventilation inlets and allow minimum 50mm of  
unrestricted air space at the rear of the unit for the air exhaust.  
3.6 AC SOURCE REQUIREMENTS  
The FPS1000 series can be operated from a nominal 100V to 240V, single phase, 47~63Hz. Refer to the  
specifications in chapter 1 for the input voltage range and the current required.  
Ensure that under heavy load, the AC voltage supplied to the power supply does not fall below the "low  
limit" specifications.  
CAUTION  
WARNING  
Connection of this power supply to an AC  
power source should be made by an  
electrician or other qualified personnel.  
There is a potential shock hazard if the power supply  
chassis and cover are not connected to an electrical safety  
ground via the safetyground in the AC input connector.  
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3.7 CONNECTING THE LOAD  
WARNING  
Turn off the AC input power before making or changing any rear panel  
connection. Ensure that all connections are securely tightened before  
applying power. There is a potential shock hazard when using a power  
supply with a rated output greater than 40V.  
3.7.1 Load Wiring.  
The following considerations should be made to select wiring for connecting the load to the power supply:  
* Current carrying capacity of the wire (refer to 3.7.2).  
*Insulation rating of the wire should be at least equivalent to the maximum output voltage of the power  
supply.  
*Maximum wire length and voltage drop (refer to 3.7.2).  
*Noise and impedance effects of the load wiring (refer to 3.7.3).  
3.7.2 Current Carrying Capacity  
Two factors should must be considered while selecting the wire size. 1.Wires should be at least heavy  
enough not to overheating while carrying the power supply load current at the rated load, or the current  
that would flow in the event the load wires were shorted, whichever is greater.  
2.Wire size should be selected to enable voltage drop per lead to be less than 1.0V at the rated current.  
Please refer to Tables 3-2 and 3-3 for maximum wire length to limit the voltage drop in American and  
European dimensions respectively.  
wire size  
AWG  
Resistivity  
Ohm/kft  
Maximum length in Feet to limit voltage  
drop to 1V or less.  
5A  
80  
10A  
40  
60  
100  
160  
250  
400  
600  
1000  
20A  
20  
30  
50  
50A  
8
12  
20  
32  
50  
80  
150A  
2
3.4  
6
10  
16  
26  
40  
68  
14  
12  
10  
8
6
4
2.526  
1.589  
120  
200  
320  
500  
800  
1200  
2000  
0.9994  
0.6285  
0.3953  
0.2486  
0.1564  
0.0983  
80  
125  
200  
300  
500  
2
0
125  
200  
Table 3-2:Maximum wire length for 1V drop on lead (in feet).  
Cross sect. Resistivity  
Maximum length in meters to limit voltage  
drop to 1V or less.  
Area  
(mm^2)  
2.5  
4
Ohm/km  
5A  
24.0  
10A  
12.0  
18.6  
29.4  
51.2  
80.0  
125.0  
177.0  
20A  
6.0  
50A  
2.4  
4.0  
5.8  
10.2  
16.0  
25.2  
35.4  
150A  
0.8  
1.4  
2.0  
3.4  
5.4  
8.4  
11.8  
8.21  
5.09  
39.2  
59.0  
102.6  
160.0  
250.0  
354.0  
9.8  
6
10  
3.39  
1.95  
14.8  
25.6  
40.0  
62.0  
88.0  
16  
25  
35  
1.24  
0.795  
0.565  
Table 3-3:Maximum wire length for 1V drop on lead (in meters).  
For currents not shown in Tables 3-2 and 3-3 , use the formula :  
Maximum length=1000/(current*resistivity)  
Where current is expressed in ampers and resistivity in ohms/km or ohms/1000ft.  
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FPS1000 Instruction Manual  
3.7.3 Noise and Impedance Effects  
To minimize the noise pickup or radiation, the load wires and remote sense wires should be twisted-pairs  
of the shortest possible length. Shielding of the sense leads may be necessary in high noise environments.  
Even if noise is not a concern, the load and remote sense wires should be twisted-pairs to reduce coupling  
between them, which might impact the stability of power supply. The sense leads should be separated  
from the power leads.  
Twisting the load wires reduces the parasitic inductance of the cable which could produce high frequency  
voltage spikes at the load and the output of power supply because of current variation in the load itself.  
The impedance introduced between the power supply output and the load could make the ripple and noise  
at the load worse than the noise at the power supply rear panel output. Additional filtering with bypass  
capacitors at the load terminals may be required to bypass the high frequency load current.  
3.7.4 Inductive loads  
To prevent damage to the power supply from inductive kickback, a diode should be connected across the  
output. The diode voltage and current rating should be greater than the power supply maximum output  
voltage and current rating. Connect the cathode to the positive output and the anode to the negative  
output. Where positive load transients such as back EMF from a motor may occur, connect a surge  
suppressor across the output to protect the power supply. The breakdown voltage rating of the suppressor  
must be approximately 10% higher than the maximum output voltage of the power supply.  
3.7.5 Making the load connections  
WARNING  
!
Hazardous voltages may exist at the outputs and the load connections  
when using a power supply with a rated output greater than 40V. To protect  
personnel against accidental contact with hazardous voltages, ensure that  
the load and it's connections has no accessible live parts.  
Ensure that the load wiring insulation rating is greater than or equal to the  
maximum output voltage of the power supply.  
3.7.6 Front panel controls and indicator  
3
2
4
1
5
1: Handle  
2: DC OK green LED, on when the output  
voltage is above 80% +/- 5% of its rated value.  
3: DC Fail red LED, on when the output voltage  
is lower than 80% +/- 5% of its rated value.  
4: AC OK green LED, on when the input  
voltage is higher than 85Vrms  
Fig. 3-1: FPS1000 front panel  
2
3
4
1
6
5
5: Lock/Unlock lever. Automatically locks the  
power supply to the FPS-S1U rack chassis  
when the FPS1000 power supply is  
inserted. Push the Lock/Unlock lever toward  
the power supply cooling fan to withdraw  
the FPS1000 from the rack.  
6: IEC320 AC inlet  
Fig. 3-2: FPS1000/P front panel  
9
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3.7.7 Input/Output connector information  
The FPS1000 series uses male connector PCIB24W9M400A1, Positronic connector. To mate FPS1000  
series to the load circuitry, use female connector PCIB24W9F400A1-S1031, Positronic connector.  
Refer to Table 3-4 and to the Outline drawing in chapter 2 for the connector pinout description.  
Pin No  
1,2,4  
3,5,6  
7
Function  
+V  
-V  
On/Off control  
Description  
Positive output voltage. Maximum current capacity: 24A/contact.  
Negative output voltage. Maximum current capacity: 24A/contact.  
Turns the output to On and Off by electrical signal or dry contact between pin 7  
and pin 10 (Signal Return). 0~0.6V or Short: On, 2~15V or Open: Off.  
The maximum source current is 2.6mA.  
8
+Sense  
Positive sensing. The +Sense signal should be connected to the positive terminal  
of the load. The +Sense and -Sense leads should be twisted pair to minimize noise  
pick-up effect. The maximum load wires drop compensation is 1V/wire.  
Open collector signal, referenced to pin 10 (Signal Return). On when Vout≥80%+/-  
5% of its rated value. The maximum sink current is 10mA and the maximum  
external voltage is 15V.  
9
DC_OK  
10  
Signal_Return  
Return for the following control and supervisory signals: On/Off, DC_OK,  
Over_temperature Alarm, AC_Fail, Auxiliary 12V supply. The Signal return is isolated  
from the output terminals.  
Open collector signal, referenced to pin 10 (Signal Return). On when the input  
voltage is ≥85Vrms. The maximum sink current is 10mA and the maximum external  
voltage is15Vdc.  
11  
12  
AC_Fail  
Over  
Temperature  
Alarm  
Open collector signal, referenced to pin 10 (Signal Return). On when the internal  
temperature is within safe limit, Off approx. 10°C below Thermal shut down. The  
maximum sink current is 10mA and the maximum external voltage is 15V.  
13  
14  
-Sense  
V_Trim  
Negative sensing. The -S signal should be connected to the negative terminal of  
the load. The -S and +S leads should be twisted pair to minimize noise pick-up  
effect. The maximum load wires drop compensation is 1V/wire.  
Connection for output voltage trimming. The voltage can be trimmed within its  
range specifications.  
Current sharing signal. When units are connected in parallel, the CS pins of the  
units should be connected to allow current balance between units.  
Auxiliary voltage output, 11.2~12.5V, referenced to pin 10 (Signal Return). The  
maximum load current is 0.25A. This output has built in Oring diode and is not  
controlled by the On/Off control.  
15  
16  
CS  
+12V Auxiliary  
Serial Data used in the I2C interface option. Refer to the I2C interface description.  
Serial Clock used in the I2C interface option. Refer to the I2C interface description.  
I2C interface address lines. Refer to the I2C interface description in Chapter 7.  
AC Ground connection, refer to the safety instructions for safety standards requirements.  
For "/P" models the AC Ground is connected via the front panel IEC inlet.  
AC Line connection, refer to the safety instructions for safety standards requirements.  
For "/P" models the AC Line is connected via the front panel IEC inlet.  
17  
18  
SDA  
SCL  
19,20,21 A0, A1, A2  
22  
23  
24  
ACG  
AC Line  
AC Neutral  
AC Neutral connection, refer to the safety instructions for safety standards requirements.  
For "/P" models the AC Neutral is connected via the front panel IEC inlet.  
Table 3-4: Rear In/Out connector pins function description  
3.7.8 REPACKAGING FOR SHIPMENT  
The original packaging material is reusable. If the original package is not available, contact the Lambda  
Sales or service facility near you for details on obtaining suitable packaging and shipping information.  
To ensure safe transportation of the instrument, it is recommended to use the original package.  
Please attach a tag to the power supply describing the problem and specifying the owner, model number  
and serial number of the power supply.  
10  
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CHAPTER 4 FUNCTIONS AND FEATURES  
4.1 Input Voltage Range  
Input voltage is single phase 85~265Vac (47~63Hz). The power supply can be operated also with a DC input voltage,  
120~330VDC but the safety approvals apply to the AC voltage only. Input voltage which is out of the specifications  
might cause damage to the unit.  
4.2 Output voltage trimming  
The output voltage can be adjusted within the specifications via the V_Trim pin at the In/Out connector.  
Refer to Fig 4-1 typical connection and calculation of the adjustment resistors:  
Note that the Over Voltage Protection may trigger if the output voltage exceeds the maximum voltage specification.  
+V  
FPS1000-12:  
R2=0.0324*V2out -1.1298*Vout+9.9342  
+S  
8
R1(KΩ)=5(KΩ)-R2(KΩ)  
FPS1000  
R1 KΩ  
V_trim  
-S  
14  
13  
FPS1000-24:  
R2=0.0785*V2out -5.819*Vout+105.132  
R1(KΩ)=20(KΩ)-R2(KΩ)  
R2 KΩ  
FPS1000-32:  
R2=0.0463*V2out -4.5805*Vout+109.49  
R1(KΩ)=20(KΩ)-R2(KΩΩ)  
-V  
Fig 4-1  
FPS1000-48:  
R2=0.0497*V2out-7.2795*Vout+259.04  
R1(KΩ)=50(KΩ)-R2(KΩ)  
4.3 Over Voltage Protection (OVP)  
The OVP triggers when the output voltage exceeds the maximum rating and reaches the OVP limit. When the OVP  
is triggered, the output voltage shuts down. In order to resume operation, the AC input voltage should be removed  
for more than 30 sec. The OVP level is factory set and is not adjustable.  
4.4 Over Current Protection (OCP)  
A constant current limiting with automatic recovery is provided. The OCP operates when the output current exceeds  
105%~125% of the rated output current. The output voltage recovers automatically when the overload condition is removed.  
Avoid operating the power supply under overload condition for long time as it might cause damage to the power  
supply.  
4.5 Over Temperature Protection (OTP)  
The OTP is activated when the ambient temperature or the power supply internal temperature exceeds a safe temperature.  
When the OTP is activated, the power supply output shuts down. The output recovers automatically when the ambient  
temperature or the internal temperature cools to a safe limit.  
4.6 Auxiliary 12V output  
An isolated 11.2V~12.5V output is provided (Referenced to the Signals_Return potential). The maximum output  
current from this output is 0.25A. This output has a built-in Oring diode to allow paralleling FPS1000 units. Use this  
output for the control and monitoring signals described in this chapter or to operate application circuits.  
4.7 Over Temperature Alarm  
An open collector output provides an Over Temperature Alarm approx. 10°C below shut down by the OTP. The open  
collector output is referenced to the Signals_Return potential and is isolated from the power supply +V and -V  
terminals  
The maximum sink current is 10mA and the maximum external voltage is 15V.  
Refer to Fig 4-2 for typical application.  
12V aux  
16  
12  
FPS1000  
10KΩ  
Over temperature alarm  
Signals return  
11  
10  
Fig 4-2  
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4.8 DC_OK signal  
An open collector output provides a low output voltage detection signal. The open collector output is on when the  
output voltage is higher than 80%+/-5% of the rated output voltage of the power supply.  
The open collector output is referenced to the Signals_Return potential and is isolated from the power supply +V  
and -V terminals  
The maximum sink current is 10mA and the maximum external voltage is 15V.  
Refer to Fig 4-3 for typical application.  
16 12V aux  
FPS1000  
10KΩ  
9
DC_OK  
10  
Signals return  
Fig 4-3  
4.9 AC_Fail signal  
An open collector output provides a low AC input voltage detection signal. The open collector output is on when the  
input voltage is 85Vac or higher.  
The open collector output is referenced to the Signals_Return potential and is isolated from the power supply +V  
and -V terminals  
The maximum sink current is 10mA and the maximum external voltage is 15V.  
Refer to Fig 4-4 for typical application.  
16 12V aux  
FPS1000  
10KΩ  
11  
10  
AC_Fail signal  
Signals return  
Fig 4-4  
4.10 Remote On/Off control  
A Remote On/Off control input is provided. The Remote On/Off input is isolated from the power supply +V and -V  
terminals and is referenced to the Signals_Return potential. The Remote On/Off can be operated either by electrical  
signal or by dry contact.  
(1) Operation by electrical signal:  
0~0.6V: Output is On.  
2~15V: Output is Off.  
The maximum sink current is 2.6mA and the maximum external voltage is 15V.  
(2) Operation by dry contact (relay or switch):  
Short between On/Off input and Signals Return: Output is On.  
Open circuit between On/Off input and Signals Return: Output is Off.  
When the Remote On/Off function is not used, connect a short circuit between the On/Off control and the Signals_Return.  
Refer to Fig 4-5 for the remote On/Off circuit description:  
16 12V aux  
FPS1000  
4.7KΩ  
I source 2.6mA max, 15Vdc max.  
On/Off control  
7
10  
Signals return  
Fig 4-5  
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4.11 Remote Sensing  
The Remote sensing compensates voltage drop on the load wiring. The maximum voltage drop on each wire is 1V,  
however, it is recommended to minimize the voltage drop on the load wires to improve the response to load current  
changes.  
In case that the sensing wires are long, use separate twisted pair wires for the sensing and for the load wires to  
minimize noise pick-up.  
It is recommended to connect electrolytic capacitors in the following locations:  
1) Across the load terminals  
2) Between the "+S" terminal and the "+V" terminal of the power supply.  
3) Between the "-S" terminal and the "-V" terminal of the power supply.  
Refer to Fig 4-6 for typical connection of remote sensing.  
8
+S  
FPS1000  
+
+
+V  
-V  
-S  
1,2,4  
3,5,6  
LOAD  
-
+
13  
Fig 4-6  
13  
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CHAPTER 5 BASIC CONNECTIONS FOR OPERATION  
5.1 Connecting single load, Local sensing  
Local sensing is suitable for applications where load regulation is not critical. Fig 5-1 shows recommended  
load and sensing connections for applications with a single load.  
1,2,4  
+
+V  
+S  
FPS1000  
8
LOAD  
13  
-S  
-V  
SIGNAL  
RTN  
ON/  
OFF  
-
3,5,6  
10  
7
Fig 5-1: single load connection, local sensing  
In Local sense applications, the +/- sense have to be connected to the  
+/-V terminals of the FPS1000 units prior the operating the FPS1000 units  
*
5.2 Connecting Single Load, Remote Sensing  
Remote sensing is used in cases where the load regulation is important at the load terminals. Use twisted  
or shielded wires to minimize noise pick-up. If shielded wires are used, the shield should be connected  
to the ground at one point, either the power supply side or the load. The optimal point for the shield ground  
should be determined by experimentation. Refer to the power supply specifications for the maximum  
voltage drop allowed at the load wires.  
Load line.  
Up to 1V drop.  
1,2,4  
+
+V  
+S  
8
FPS1000  
LOAD  
13  
-S  
-V  
SIGNAL  
RTN  
ON/  
OFF  
3,5,6  
-
10  
7
Load line.  
Up to 1V drop.  
Sense lines  
Twisted pairs  
Fig 5-2: Remote sensing, single load.  
5.3 Connecting Multiple loads, radial distribution method  
In cases of multiple loads connected to one supply, each load should be connected to the power supply's  
output terminals using separate pairs of wires. It is recommended that each pair of wires will be as short  
as possible and twisted or shielded to minimize noise pick-up and radiation.  
The sense wires should be connected to the power supply output terminals or to the load with the most  
critical load regulation requirement.  
1,2,4  
+
+V  
+S  
LOAD # 1  
LOAD # 2  
LOAD # 3  
-
FPS1000  
8
+
13  
-S  
-V  
SIGNAL  
RTN  
ON/  
OFF  
-
3,5,6  
10  
7
+
-
Fig 5-3: Multiple loads connection , radial distribution  
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5.4 Multiple loads connection with distribution terminals  
If remotely located output distribution terminals are used, the power supply output terminals should be  
connected to the distribution terminals by a pair of twisted or shielded wires. Each load should be separately  
connected to the remote distribution terminals (see Fig 5-4). If remote sensing is required, the sensing  
wires should be connected to the distribution terminals or at the most critical load.  
+V  
1,2,4  
+
+V  
+S  
LOAD # 1  
LOAD # 2  
LOAD # 3  
-
FPS1000  
8
+
13  
-S  
-V  
SIGNAL  
RTN  
ON/  
OFF  
-
3,5,6  
10  
7
+
-V  
-
Fig 5-4: Multiple loads connection with distribution terminal  
5.5 Grounding outputs  
Either the positive or negative output terminals can be grounded. To avoid noise problems caused by  
common-mode current flowing from the load to ground, it is recommended to ground the output terminal  
as close as possible to the power supply's output. Always use two wires to connect the load to the power  
supply regardless of how the system is grounded.  
15  
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CHAPTER 6 PARALLEL AND SERIES OPERATION  
6.1 Parallel operation  
Up to 8 FPS1000 units of the same output voltage rating can be connected in parallel. By connecting the CS signal  
between the paralleled units, automatic current balance is achieved, with +/-10% accuracy. Derate the total output  
current by 10% when using parallel operation to prevent overload condition.  
The built-in Oring diodes on the main output and the 12V Auxiliary output allow N+1 operation.  
For input voltages less than 100Vac, maximum output Power derated by 10% of the Power rating.  
6.1.1 Parallel operation with Remote sensing  
Fig 6-1 shows typical connection of parallel operation with Remote sensing. The CS signal wires should be as short  
as possible and with the same length.  
+V  
+S  
FPS1000 #1  
+S  
-S  
SIG.  
ON/  
-S  
CS RTN OFF  
-V  
+S  
15 10  
7
+V  
+S  
+V  
-V  
FPS1000 #2  
+S  
-S  
LOAD  
-S  
-V  
SIG.  
ON/  
CS RTN OFF  
15 10  
7
-S  
+V  
+S  
FPS1000 #N  
+S  
-S  
-S  
-V  
SIG.  
ON/  
CS RTN OFF  
15 10  
7
Fig 6-1: Parallel operation with Remote sensing  
6.1.2 Output voltage trimming at parallel operation  
The output voltage of the units connected in parallel can be made by a single trimmer or resistive divider as shown  
in Fig 6-2.  
V TRIM  
FPS1000 #1  
+S  
SIG.  
ON/  
FPS1000-12:  
-S  
CS RTN OFF  
R2=0.0324*V2out -1.1298*Vout+9.9342  
R1(KΩ)=5(KΩ)-R2(KΩ)  
15 10  
7
V TRIM  
+S  
-S  
V TRIM  
+S  
ON/  
+V  
FPS1000-24:  
FPS1000 #2  
R1  
R2  
R2=0.0785*V2out -5.819*Vout+105.132  
R1(KΩ)=20(KΩ)-R2(KΩ)  
SIG.  
-S  
CS RTN OFF  
15 10  
7
-V  
FPS1000-32:  
R2=0.0463*V2out -4.5805*Vout+109.49  
R1(KΩ)=20(KΩ)-R2(KΩΩ)  
V TRIM  
FPS1000 #N  
+S  
FPS1000-48:  
R2=0.0497*V2out-7.2795*Vout+259.04  
R1(KΩ)=50(KΩ)-R2(KΩ)  
SIG.  
ON/  
-S  
CS RTN OFF  
15 10  
7
Fig 6-2: Output voltage trimming at parallel operation  
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6.1.3 Signal Return bus at parallel operation  
The Signal Return of each paralleled unit can be connected together to form a common Signal Return bus.  
By this way, the control and monitoring signals of the paralleled units can be connected to the same control and  
monitoring circuitry.  
The Signal Return bus can be connected to the -V or -S or +V or -S or float. Fig 6-3 shows typical connection of  
the Signal Return at parallel operation.  
FPS1000 #1  
9, 11, 12  
AC_FAIL  
DC_OK  
OVER-TEMP  
ALARM  
10  
SIG.  
RETURN  
FPS1000 #2  
9, 11, 12  
AC_FAIL  
DC_OK  
CONTROL AND  
MONITORING CIRCUITS  
OVER-TEMP  
ALARM  
10  
SIG.  
RETURN  
FPS1000 #1 SIGNALS  
FPS1000 #2 SIGNALS  
FPS1000 #N SIGNALS  
FPS1000 #N  
9, 11, 12  
AC_FAIL  
DC_OK  
OVER-TEMP  
ALARM  
10  
SIG.  
RETURN  
SIGNALS RETURN  
Fig 6-3: Signal Return connection at parallel operation  
6.1.4 Remote On/Off control at parallel operation  
The paralleled units can be turned On or Off via a single On/Off control. Refer to Fig 6-4 for typical application. The  
Signal Return function of all the paralleled units should be connected together to create a common Signal Return  
bus. The Signal Return bus may be connected to the -V or the +V potential or floated. In any case do not connect  
the Signal Return bus to different potentials.  
7
ON/OFF  
FPS1000 #1  
10  
SIG.  
RETURN  
7
ON/OFF  
FPS1000 #2  
10  
ON  
OFF  
SIG.  
RETURN  
7
ON/OFF  
FPS1000 #N  
10  
SIG.  
RETURN  
Fig 6-4: Remote On/Off control at parallel operation  
17  
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6.2 Series operation  
Two units can be seriesly connected to increase the output voltage or to create a bipolar voltage source. It is  
recommended to connect diodes in parallel with each output to prevent reverse voltage in case of failure in one of  
the power supplies. Each diode should be rated to at least the power supply rated output voltage and output current.  
Refer to Fig 6-5 and 6-6 for typical lseries connection of power supplies.  
Series connection for increased output voltage.  
+S  
FPS1000 #1  
+V  
+S  
(*)  
-V  
-S  
SIG.  
RTN OFF  
ON/  
+V  
-V  
10  
7
LOAD  
+S  
+V  
FPS1000 #2  
(*)  
-V  
-S  
SIG.  
ON/  
RTN OFF -S  
10  
7
(*) Diodes are user supplied  
Fig 6-5: Series connection for increased output voltage  
Series connection for positive and negative output voltage.  
+S  
+V  
FPS1000 #1  
(*)  
-V  
-S  
SIG. ON/  
RTN OFF  
+V  
LOAD  
10  
7
COMMON  
+S  
+V  
-V  
FPS1000 #2  
(*)  
-V  
SIG.  
ON/  
RTN OFF -S  
10  
7
(*) Diodes are user supplied  
Fig 6-6: Series connection for Bipolar output voltage  
CAUTION  
Series operation is not applicable for units with I2C bus option.  
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CHAPTER 7  
I2C BUS INTERFACE OPTION  
7.1 Introduction  
The I2C interface option includes facilities to monitor operating parameters of the power supply. The parameters  
are then transferred to the host PC if demanded, over a standard I2C bus.  
The following data can be monitored for the individual units connected to the I2C bus:  
1. Status of the unit.  
2. Actual output voltage, output current and internal temperature of the unit.  
3. Manufacturing related data (model, serial number, manufacturing date etc…).  
7.1.1 Addressing (A0, A1, A2).  
Three address lines allow up to eight FPS1000 units to be addressed on a single I2C bus. The address lines are  
internally pulled-up to +5V by resistors. Addressing of a unit is achieved by hard-wiring an address line to the  
-Sense to set it to "0" or leaving the address line open to set it to "1".  
7.1.2 Serial clock  
This line is clocked by the processor which controls the I2C bus. It should be connected to +5V (referenced to -Sense)  
via a pull-up resistor of 2KΩ. The I2C interface is designed to run with a serial clock speed of 100KHz.  
7.1.3 Serial dataThis line is a bidirectional data line. It should be connected to +5V  
(referenced to -Sense) via a pull-up resistor of 2KΩ.  
7.2 I2C Interface Specifications  
7.2.1 General specifications  
1. Clock frequency:  
100KHz  
2. Address lines:  
Three (A0, A1, A2). Support 8 power supply modules  
7.2.2 Output voltage measurement  
1. Measurement accuracy:  
2. Measurement resolution:  
+/-2% of full scale  
8 bits  
3. Measurement range:  
0~60.0V for 48V model / 0~40.0V for 32V model / 0-30.0V for 24V model.  
7.2.3 Output current measurement  
1. Measurement accuracy:  
2. Measurement resolution:  
3. Measurement range:  
+/-10% of full scale  
8 bits  
0~25.0A for 48V model 0~50A for 32V & 24V models  
/
7.2.4 Internal temperature measurement  
1. Measurement accuracy:  
2. Measurement resolution:  
3. Measurement range:  
+/-3°C  
8 bits  
0-100°C  
7.2.5 EEPROM  
1. EEPROM type:  
2. EEPROM data:  
AT24C02AN-10S , Atmel, or equivalent  
Model name, Serial no., Revision, Manufacture. Name, Output voltage,  
Date, Country of manufacturing, Check-Sum  
7.2.6 Status register  
1. Register type:  
PCF8574, Philips, or equivalent.  
2. Register content:  
DC Fail, Over-Temperature Protection (OTP)  
Temperature Alarm, Fan Fail, AC Fail  
CAUTION  
The I2C bus address lines, serial clock and data are  
referenced to the -Sense potential. When using series  
connection of FPS1000 units, do not connect the I2C lines  
of the units together.  
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7.3 Block diagram of the I2C option  
Refer to Fig 7-1 for description of the I2C block diagram and for typical application.  
Output Fail  
A0  
OTP  
Temperature Alarm  
Fan Fail  
AC Input Fail  
A1  
A2  
REGISTER  
A0  
Output voltage  
A1  
Output current  
Temperature  
A2  
ADC  
A0  
A1  
A2  
A0  
A1  
A2  
EEPROM  
Fig 7-1: I2C option bloack diagram  
Serial CLOCK  
Serial DATA  
7.4 Operation and functions  
7.4.1. Digital status  
Digital status functions are provided by a PCF8574, 8-bit Register. It provides a single 8-bit word when read by the  
I2C controller. Fault is indicated by "1" and Good level is indicated by "0".  
Refer to Table 7-1 for the register information.  
BIT  
FUNCTION  
MEANING  
0
1
2
3
4
5
6
7
Output Fail  
Output voltage is <80% +/- 5% of Vout rated  
Internal temperature is over 80°C. Supply turns off.  
Internal temperature is over 70°C. Supply is on.  
Failure of an internal fan.  
AC Input <85Vac  
Always "0".  
Always "0".  
Always "0".  
Over Temperature Protection  
Temperature Alarm  
Fan Fail  
AC Input Fail  
Not Used  
Not Used  
Not Used  
Table 7-1  
PCF8574 slave address:  
Bit  
Value  
7
0
6
1
5
0
4
0
3
A2  
2
A1  
1
A0  
0
R/W  
7.4.2 EEPROM functions  
A 256 bytes EEPROM included in the I2C option. The EEPROM type is AT24C02 and it is programmed at the factory  
with the data shown in Table 7-2.  
ADDRESS BYTES  
0
DATA  
4
Number of fields  
Manufacturer  
Serial number  
Revision  
Country of manufacture  
Model name  
Output voltage  
Date of manufacture  
Checksum  
4
20  
16  
20  
16  
16  
16  
16  
16  
2
40  
56  
72  
88  
104  
254  
Table 7-2  
The slave EEPROM address is:  
Bit  
Value  
7
1
6
0
5
1
4
0
3
A2  
2
A1  
1
A0  
0
R/W  
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7.4.3 Analog functions  
Analog functions are provided by a single PCF8591, 4-channel 8-bit A/D converter. When this device is read by the  
serial buscontroller it provides an 8-bit word with the following information:  
Channel 1: Output voltage,  
channel 2: Output current,  
channel 3: Internal temperature.  
The PCF8591 slave address is:  
Bit  
Value  
7
1
6
0
5
0
4
1
3
A2  
2
A1  
1
A0  
0
R/W  
The PCF8591 device initially requires a control byte to be written to the configuration register.  
The control byte is as follows:  
Bit  
Value  
7
0
6
A
5
0
4
0
3
0
2
B
1
C
0
D
When a single channel is to be read, A,B,C and D should be determined as follows:  
A/D channel  
Voltage  
Current  
A
0
0
0
B
0
0
0
C
0
0
1
D
0
1
0
Temperature  
To read all channels with a single control byte, A and B have to be "1", C and D have to be "0". This control byte  
sets the device so that on each successive read the data from the next A/D is read.Thus, the first result from a  
sequence of reads should not be considered.  
Note that on each read, a conversion is started for a particular channel and the result will be read from the previous channel.  
7.4.4 A/D Scaling  
The A/D readback has to be scaled to obtain a correct value for the voltage, current and the temperature. Note that  
the voltage reading is made inside the power supply unit before the "Oring" diode and is typically 0.5V higher than  
the actual output voltage.  
VALUE = BYTE VALUE x RESOLUTION  
The following scaling should be employed:  
Refer to the following table for the scaling of the A/D channels:  
FPS1000-12/S  
FPS1000-32/S  
FPS1000-24/S  
0~15V  
0~80A  
0~100°C 0.391°C/Bit  
0.0586 V/Bit  
0.312 A/Bit  
FPS1000-48/S  
The measurement range is from 0 to the maximum value listed in the range column. The resolution or scale of  
reading is linear over the entire range and provides a linear output on the A/D converter.  
7.5 Measurements and calculation examples  
7.5.1 Output voltage readback  
The voltage before the "Oring" diode is measured and can be read from the A/D converter. This voltage is higher  
than the voltage at the output terminals by 0.5V typically.  
Model: FPS 1000-48/S  
1. Output voltage (at the output terminals): 48.0V  
2. Voltage before the "Oring" diode: 48.0V+0.5V=48.5V  
3. .Hex readback: CE (1100 1110).  
4. Convert the hex readback to decimal: 206  
5. Calculate measured Vout: Vout=206*0.2344=48.286V  
7.5.2 Output current readback  
The output current is sensed by an internal shunt and measured by an A/D converter. Refer to the following examplefor  
current readback calculation.  
1. Actual output current: 21.0A  
2. Hex readback: E0 (1110 0000).  
3. Convert the hex readback to decimal: 224  
4. Calculate measured Iout: Iout=224*0.0977=21.884A.  
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7.5.3 Internal temperature measurement  
The internal ambient temperature is measured to provide information of the safe operation of the power supply. The  
internal ambient temperature is usually higher than the power supply air intake temperature due to internal power  
dissipation. As the power dissipation varies with the load, the internal ambient temperature increases with the load.  
Refer to Fig 7-2 for typical internal temperature rise above the air intake temperature versus the load.  
Internal temp.  
rise (°C)  
15  
10  
5
0
25  
50  
75  
100 % of rated load  
Fig 7-2: Internal temperature rise vs. load  
Internal temperature calculation example:  
1. Hex readback: 68 (0110 1000).  
2. Convert hex readback to decimal: 104  
3. Calculate the measured temperature:  
Temp=104*0.391=40.664oC  
7.6 Typical application diagram  
A typical application is described in Fig 7-3.  
ON/OFF  
CONTROL  
SIGNAL  
RETURN  
ON/OFF  
+S  
+V  
CLOCK  
+
SCL  
SDA  
RS232 TO  
I2C  
DATA  
LOAD  
PC  
FPS1000  
RS232  
CONVERTOR  
RS232  
-V  
-S  
-
CABLE  
GND  
A0  
A1  
A2  
ADDRESS  
SETTING  
Fig 7-3: Typical application of I2C interface  
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FPS1000 Instruction Manual  
CHAPTER 8 FPS1000 MAINTENANCE  
8.1 Introduction  
This chapter contains information about maintenance, calibration and troubleshooting of the FPS1000 power supply.  
8.2 Units under warranty  
Units requiring repairs during the warranty period should be returned to Densei-Lambda authorized service office.  
Unauthorized repairs performed by other than the authorized service facilities may void the warranty.  
8.3 Periodic maintenance  
No routine maintenance of the FPS1000 power supply is required except for periodic cleaning. To clean, disconnect  
the unit from the AC supply and allow 30sec. for discharging internal voltage. The FPS1000 should be cleaned using  
mild solution of detergent and water. The solution should be applied onto a soft cloth, and not directly to the surface  
of the unit. Do not use aromatic hydrocarbons or chlorinated solvents for cleaning. Use low pressure compressed  
air to blow dust from the unit.  
8.4 Adjustments and Calibration  
No internal adjustment or calibration are required. Units that are returned for repair will be calibrated at the service  
office.In any case ,opening the cover is not allowed.  
8.5 Fan life expectancy  
The fan life has limitation depending mainly on the ambient temperature. Please refer to Fig 8-1 for the expected  
fan life vs. the ambient temperature. In case that the fan should be replaced, contact your nearest Densei-Lambda  
authorized service office.  
10  
1
0
50  
100  
Ambient temperature (°C)  
Fig 8-1: Expected fan life vs. ambient temperature  
8.6 Before concluding that the unit is at fault:  
Before concluding that the unit is at fault, make the following tests:  
* Check if the AC voltage is within the specification range.  
*Check if the input and output wiring is correct.  
*Check if the +S and -S wires are connected to the +Vout and -Vout (refer to sec. 4.11).  
*Check if the wires size is sufficient (refer to sec. 3.7.2).  
*Check if the output voltage control, V_Trim, is connected properly (refer to sec. 4.2).  
*Check if the On/Off control is connected properly (refer to sec. 4.10).  
*Check if the load current and power consumption are within the power supply specifications.  
*Audible noise can be heard during dynamic load operation.  
*Audible noise can be heard when the input voltage waveform is not sinusoidal.  
8.7 Parts replacement and repair  
As repairs are made only by the manufacturer or by its authorized service offices, no parts replacement information  
is given inthis manual. In case of failure, unusual or erratic operation of the unit, contact your nearest Densei-Lambda  
sales and service office.  
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FPS-S1U 19” Rack Single Output  
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FPS-S1U Instruction Manual  
CHAPTER 9  
FPS-S1U RACK SPECIFICATIONS  
1
2
3
4
5
6
7
8
9
Number of power supply modules (*1) ---  
Maximum 3 x FPS1000 modules of the same output voltage rating.  
3000  
Maximum output power  
(*2)  
W
Input voltage / frequency range  
(*3) ---  
85~265Vac continuous, 47~63Hz, Single phase  
12.0/6.0 for each FPS1000 unit installed  
FPS-S1U :IEC inlet for each power supply module . FPS-S1U/P :None  
Bus-bars.Refer to outline drawing.  
Maximum input current (at 100/200Vac)  
AC input connector  
A
---  
---  
V
Output terminals  
Remote sensing  
Parallel operation  
Series operation  
(*4)  
Possible.  
--- Possible. Up to 3 racks with max 8 FPS 1000 units of the same voltage and current rating.  
(*5) ---  
Possible. Up to 2 racks of the same voltage and current rating  
Separate control for each FPS 1000 unit , By electrical signal or dry contact  
ON: 0~0.6V or short. OFF: 2~15V or open.  
10 Remote On/Off control  
11 DC_OK signal  
---  
---  
---  
---  
Separate control for each FPS1000 unit, Open collector signal.  
On when Vout >80% +/-5%. Max.sink current: 10mA  
Separate control for each FPS1000 unit ,Open collector signal.  
Refer to Instruction Manual  
12 AC fail signal  
Separate control for each FPS1000 unit ,Open collector signal.  
Refer to Instruction Manual  
13 Over Temperature alarm signal  
14 Vout voltage trimming  
15 Auxiliary power supply  
16 Operating temperature  
17 Storage temperature  
18 Operating humidity  
19 Storage humidity  
--- Possible, via separate control for each FPS1000 unit .Refer to Instruction Manual.  
--- 11.2~12.5VDC.Maximum output current:0.25A*Number of installed FPS1000 units.  
---  
---  
---  
---  
---  
---  
---  
0~50°C: 100% load. Derate 2%/°C, 50°C to 60°C.  
-30~85°C  
10~90% RH, no condensation.  
10~90% RH, no condensation.  
Built to meet ETS 300 019  
20 Vibration  
21 Shock  
Built to meet ETS 300 019  
22 Applicable safety standards  
UL60950-1, EN60950-1  
Input-Output: 3000Vrms, 1min. Input-Ground: 2000Vrms, 1min. Output-Ground:  
500Vrms, 1min.  
23 Withstand voltage  
24 Insulation resistance  
25 Weight (Typ)  
26 Size (W*H*D)  
27 Warranty  
---  
---  
Kg  
---  
Yr  
More than 100Mohm at 25°C and 70% RH. Output-Ground: 500Vdc  
3.7  
440x44x351mm. Refer to Outline Drawing.  
Two Years  
Notes:  
*1: The Output of all the FPS1000 modules are connected in parallel in the rack.  
*2: For input voltage lower than 100Vac, maximum output power derated by 10% of the power rating.  
*3: For cases where conformance to to various safety standards (UL, EN etc.) is required, to be described  
as 100-240Vac (50/60Hz).  
*4: Remote sensing can compensate up to 1V drop on each load wire.  
*5: Not apllicable for units with I2C bus option.  
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CHAPTER 10  
10.1 GENERAL  
FPS-S1U RACK INSTALLATION  
This chapter contains instructions for initial inspection, preparation for use and repackaging for shipment.  
In some sections in this chapter, where the instructions for the FPS-S1U and the FPS1000 are identical,  
a reference to a section describing the FPS1000 will be given.  
10.2 PREPARATION FOR USE  
Table 10-1 below describes the basic setup procedure. Follow the instructions in Table 10-1 in the sequence  
given to prepare the FPS-S1U rack for use.  
Step no Item  
Description  
Reference  
Section 3.3  
Section 10.4  
Section 10.5  
Section 3.6  
Section 10.7  
1
2
Inspection  
Installation  
Initial physical inspection of the power supply  
Installing the power supply.  
Ensuring adequate ventilation.  
AC source requirements  
Wire size selection.  
3
4
AC source  
Load connection  
Table 10-1: Basic setup procedure  
10.3 INITIAL INSPECTION  
Refer to Sec. 3.3 for details.  
10.4 FPS-S1U RACK MOUNTING  
The FPS-S1U is designed to be mounted in a 19" rack. Use a support bars or surface to provide adequate  
support for the rear of the power supply. Secure the FPS-S1U to its location using the front panel using  
M6x12 screws via the mounting holes at its front side (Refer to the outline drawings in Chapter 11).  
Do not obstruct the air exhaust at the rear panel of the unit.  
10.5 LOCATION MOUNTING AND COOLING  
The FPS1000 units installed in the FPS-S1U rack are fan cooled. The air intake is at the front panel and  
the exhaust is at the rear panel. Upon installation allow cooling air to reach the front panel and allow  
minimum 50mm of unrestricted air space at the rear of the unit for the air exhaust.  
10.6 AC SOURCE REQUIREMENTS  
Refer to Sect 3.6 for details.  
10.7 CONNECTING THE LOAD  
WARNING  
Turn off the AC input power before making or changing any rear panel connection.  
Ensure that all connections are securely tightened before applying power. There is a  
potential shock hazard when using a power supply with a rated output greater than 40V.  
10.7.1 Load Wiring  
.Refer to Sec. 3.7.1, 3.7.2 and 3.7.3 for details.  
10.7.2 Inductive loads  
To prevent damage to the power supply from inductive kickback, a diode should be connected across the  
output. The diode voltage and current rating should be greater than the power supply maximum output  
voltage and total current rating. Connect the cathode to the positive output and the anode to the negative  
output. Where positive load transients such as back EMF from a motor may occur, connect a surge  
suppressor across the output to protect the power supply. The breakdown voltage rating of the suppressor  
must be approximately 10% higher than the maximum output voltage of the power supply.  
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FPS-S1U Instruction Manual  
10.7.3 Making the load connections  
WARNING  
!
Hazardous voltages may exist at the outputs and the load connections  
when using a power supply with a rated output greater than 40V. To  
protect personnel against accidental contact with hazardous voltages,  
ensure that the load and it's connections has no accessible live parts.  
Ensure that the load wiring insulation rating is greater than or equal to  
the maximum output voltage of the power supply.  
The load wires should be properly terminated with terminals securely attached. DO NOT use unterminated  
wires for load connection at the FPS-S1U.  
10.7.4 Rear panel description  
1
2
3
5
1
4
Fig. 10-1: FPS-S1U Rear panel  
1. Mounting brackets. Use M6x12 screws to fix the FPS-S1U to the rack.  
2: DB25 connector for control and monitoring signals.  
3: Output voltage terminals. Use M6x16 screws and M6 lug to connect the load wire. The recommended  
tightening torque is 42~56Kgf.cm.  
4. DIP switch for I2C option address setting. Refer to Chapter 14 for details.  
5. IEC320 AC inlets, shown for FPS-S1U rack. For FPS-S1U/P, there are no IEC320 inlets on the rack.  
10.7.5 Control and monitoring signals connector  
Pin No Function  
1
Description  
Connection for output voltage trimming of FPS1000 unit "B". The voltage can be  
trimmed within its range specifications.  
V_TRIM_B  
2
TEMP_ALARM_B  
Open collector signal, referenced to pin 11 (Signal Return). On when the internal temperature  
of FPS1000 unit "B" is within safe limit, Off approx. 10°C below Thermal shut down. The  
maximum sink current is 10mA and the maximum external voltage is 15V.  
3
4
5
DC_OK_B  
Open collector signal, referenced to pin 11 (Signal Return). On when the output voltage  
of FPS1000 unit "B" is higher than ≥ 80%+/-5%. The maximum sink current: 10mA  
and the maximum external voltage is 15V.  
Open collector signal, referenced to pin 11 (Signal Return). On when the internal temperature  
of FPS1000 unit "A" is within safe limit, Off approx. 10°C below Thermal shut down. The  
maximum sink current is 10mA and the maximum external voltage is 15V.  
TEMP_ALARM_A  
ON/OFF_A  
Turns the output of FPS1000 unit "A" to On and Off by electrical signal or dry contact  
between pin 5 and pin 11 (Signal Return). 0~0.6V or Short: On, 2~15V or Open:  
Off. The maximum source current is 2.6mA.  
6
DC_OK_A  
Open collector signal, referenced to pin 11 (Signal Return). On when the output  
voltage of FPS1000 unit "A" is higher than Vout ≥ 80%+/-5%. The maximum sink  
current: 10mA and the maximum external voltage is 15V.  
7
8
V_TRIM_A  
+12V_AUX  
Connection for output voltage trimming of FPS1000 unit "A". The voltage can be  
trimmed within its range specifications.  
Auxiliary voltage output, 11.2~12.5V, referenced to pin 11 (Signal Return). The  
maximum load current is 0.25A. This output has built in Oring diode and is not controlled  
by the On/Off control.  
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10.7.5 Control and monitoring signals connector  
9
CS  
Current sharing signal. When FPS-S1U racks are connected in parallel, the CS pins  
of the units should be connected to allow current balance between units.  
10  
11  
V_TRIM_C  
Connection for output voltage trimming of FPS1000 unit "C". The voltage can be  
trimmed within its range specifications.  
SIGNAL_RETURN Return for the following control and supervisory signals: On/Off, DC_OK,  
Over_temperature Alarm, AC_Fail, Auxiliary 12V supply. The Signal return is isolated  
from the output terminals.  
12  
13  
14  
15  
DC_OK_C  
Open collector signal, referenced to pin 11 (Signal Return). On when the output voltage  
of FPS1000 unit "C” is higher than ≥ 80%+/-5%. The maximum sink current: 10mA  
and the maximum external voltage is 15V.  
+SENSE  
Positive sensing. The +Sense signal should be connected to the positive terminal of  
the load. The +Sense and -Sense leads should be twisted pair to minimize noise pick-  
up effect. The maximum load wires drop compensation is 1V/wire.  
AC_FAIL_B  
ON/OFF_B  
Open collector signal, referenced to pin 11 (Signal Return). On when the input voltage  
of FPS1000 unit "B" is ≥85Vrms. The maximum sink current is 10mA, and the maximum  
external voltage is 15Vdc.  
Turns the output of FPS1000 unit "B" to On and Off by electrical signal or dry contact  
between pin 15 and pin 11 (Signal Return). 0~0.6V or Short: On, 2~15V or Open:  
Off. The maximum source current is 2.6mA.  
16  
AC_FAIL_A  
Open collector signal, referenced to pin 11 (Signal Return). On when the input voltage  
of FPS1000 unit "A" is ≥85Vrms. The maximum sink current is 10mA, and the maximum  
external voltage is 15Vdc.  
17  
18  
19  
20  
NC  
Not connected  
Not connected  
Not connected  
NC  
NC  
SCL (I2C)  
Serial Clock used in the I2C interface option. Refer to the I2C interface description in  
the Chapter 7 in this Instruction Manual.  
21  
22  
SDA (I2C)  
-SENSE  
Serial Data used in the I2C interface option. Refer to the I2C interface description in  
the Chapter 7 in this Instruction Manual.  
Negative sensing. The -Sense signal should be connected to the negative terminal  
of the load. The -Sense and +Sense leads should be twisted pair to minimize noise  
pick-up effect. The maximum load wires drop compensation is 1V/wire.  
23  
24  
25  
TEMP_ALARM_C Open collector signal, referenced to pin 11 (Signal Return). On when the internal temperature  
of FPS1000 unit "C" is within safe limit, Off approx 10°C below Thermal shut down. The  
maximum sink current is 10mA and the maximum external voltage is 15V.  
AC_FAIL_C  
Open collector signal, referenced to pin 11 (Signal Return). On when the input voltage  
of FPS1000 unit "C" is ≥85Vrms. The maximum sink current is 10mA, and the maximum  
external voltage is 15Vdc.  
ON/OFF_C  
Turns the output of FPS1000 unit "C" to On and Off by electrical signal or dry contact  
between pin 25 and pin 11 (Signal Return). 0~0.6V or Short: On, 2~15V or Open: Off.  
The maximum source current is 2.6mA.  
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FPS-S1U Instruction Manual  
10.7.6 Modules location  
Up to three FPS1000 modules of the same output voltage rating can be plugged into an FPS-S1U rack.  
Refer to Fig 10-2 for the modules location.  
PS MODULE “A”  
PS MODULE “B”  
Air flow direction  
Front side  
see note 1  
PS MODULE “C”  
Fig 10-2: FPS1000 modules location  
Note 1: Forced air cooling allow minimum 50mm of unrestricted air space at the rear of the unit. Do not  
obsruct air flow to the unit front panel.  
10.7.7 Blank panels  
Each FPS-S1U rack is supplied with two blank panels in the package. Use the blank panels to close the  
front panel opening in places where FPS1000 power supplies are not installed. Use M3x6 screws to fix  
the blank panel to the chassis. Refer to the outline drawings in chapter 11 for details.  
10.7.8 Repackaging for shipment  
Refer to Sec. 3.7.8 for details.  
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CHAPTER 11 FPS-S1U AND FPS-S1U/P OUTLINE DRAWINGS  
11.1 FPS-S1U Outline Drawing  
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FPS-S1U Instruction Manual  
11.2 FPS-S1U/P Outline Drawing  
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CHAPTER 12 BASIC CONNECTIONS FOR OPERATION FPS-S1U RACK  
12.1 Connecting single load, Local sensing  
Local sensing is suitable for applications where load regulation is not critical. Fig 12-1 shows recommended  
load and sensing connections for applications with a single load.  
+V  
+V  
+S  
FPS-S1U  
13  
22  
LOAD  
ON/  
OFF  
A
ON/  
OFF  
B
ON/  
OFF  
C
-S  
-V  
SIGNAL  
RTN  
-V  
11  
5
15  
25  
Fig 12-1: single load connection, local sensing  
In Local sense applications, the +/- sense have to be connected to the  
+/-V terminals of the FPS-S1U prior to operating the FPS1000 units plugged in.  
*
12.2 Connecting Single Load, Remote Sensing  
Remote sensing is used in cases where the load regulation is important at the load terminals. Use twisted  
or shielded wires to minimize noise pick-up. If shielded wires are used, the shield should be connected  
to the ground at one point, either the power supply side or the load. The optimal point for the shield ground  
should be determined by experimentation. Refer to the power supply specifications for the maximum  
voltage drop allowed at the load wires.  
Load line. Up to 1V drop.  
+V  
+V  
+S  
FPS-S1U  
*
13  
22  
LOAD  
-S  
-V  
ON/ ON/ ON/  
OFF OFF OFF  
SIGNAL  
RET  
A
B
C
-V  
11  
5
15 25  
Load line.  
Up to 1V drop.  
Sense lines  
Twisted pairs  
Fig 12-2: Remote sensing, single load.  
12.3 Multiple loads connection  
If remotely located output distribution terminals are used, the power supply output terminals should be  
connected to the distribution terminals by a pair of twisted or shielded wires. Each load should be separately  
connected to the remote distribution terminals (see Fig 12-3). If remote sensing is required, the sensing  
wires should be connected to the distribution terminals or at the most critical load.  
+V  
+
+V  
+S  
LOAD # 1  
LOAD # 2  
LOAD # 3  
-
FPS-S1U  
13  
22  
+
ON/ ON/ ON/  
OFF OFF OFF  
-S  
-V  
SIGNAL  
RET  
-
A
B
C
11  
5
15 25  
+
-V  
-
Fig 12-3: Multiple loads connection with distribution terminal  
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12.4 On/Off control  
Fig 12-4 shows typical connection for individual On/Off control of each installed FPS1000 unit. The On/Off  
control signal is applied to the DB25 connector located at the rear panel (refer to sec. 10.7.5).  
When it is desired to control all the installed units simultaneously, it is possible to connect the On/Off control  
as shown in Fig 12-5.  
5
5
ON/OFF_A  
ON/OFF_B  
ON/OFF_C  
ON/OFF_A  
ON/OFF_B  
ON/OFF_C  
FPS-S1U  
FPS-S1U  
15  
25  
15  
25  
ON/  
OFF  
ON/  
OFF  
ON/  
OFF  
ON/  
OFF  
11  
11  
SIGNAL_RET  
SIGNAL_RET  
UNIT UNIT UNIT  
‘C’ ‘B’ ‘A’  
Fig 12-4: Individual On/Off control  
Fig 12-5: Single On/Off control  
12.5 Output voltage trimming  
Refer to Fig 12-6 for output voltage trimming typical application.  
FPS-S1U with FPS1000-12 installed:  
R2=0.0324*V2out -1.1298*Vout+9.9342  
R1(KΩ)=5(KΩ)-R2(KΩ)  
+V  
13  
FPS-S1U  
+S  
V_TRIM_A  
V_TRIM_B  
FPS-S1U with FPS1000-24 installed:  
R2=0.0785*V2out -5.819*Vout+105.132  
R1(KΩ)=20(KΩ)-R2(KΩ)  
7
1
R1  
R2  
10  
22  
V_TRIM_C  
-S  
FPS-S1U with FPS1000-32 installed:  
R2=0.0463*V2out -4.5805*Vout+109.49  
R1(KΩ)=20(KΩ)-R2(KΩΩ)  
-V  
FPS-S1U with FPS1000-48 installed:  
R2=0.0497*V2out-7.2795*Vout+259.04  
R1(KΩ)=50(KΩ)-R2(KΩ)  
Fig 12-6: Output voltage trimming  
12.6 Supervisory signals  
Supervisory signals are accessible at the J1-DB25 female connector on the rear panel of the rack.  
Fig 12-7 shows a typical connection for FPS1000 unit "A" inside the rack.  
Units "B" and "C" connections - Reffer to sec 10.7.5.  
(J1)  
8
FPS-S1U  
12V AUX  
AC_FAIL_A  
FPS-1000  
Module A  
10K 10K  
16  
6
Application  
Monitoring  
and Control  
circuts  
DC_OK_A  
10K  
4
TEMP.ALARM_A  
SIGNAL RET  
11  
FPS-1000 Module B  
FPS-1000 Module C  
Note: AC_FAIL, DC_OK and TEMP.ALARM are open collector signals.  
Fig 12-7: Supervisory signals  
12.7 Grounding outputs  
Either the positive or negative output terminals can be grounded. To avoid noise problems caused by  
common-mode current flowing from the load to ground, it is recommended to ground the output terminal  
as close as possible to the power supply's output. Always use two wires to connect the load to the power  
supply regardless of how the system is grounded.  
33  
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CHAPTER 13 PARALLEL AND SERIES OPERATION  
13.1 Parallel operation  
Up to 3 FPS-S1U racks with up to 8 FPS1000 installed units of the same output voltage rating can be connected  
in parallel. The built-in Oring diodes on the main output and on the +12V auxiliary voltage in each FPS1000 unit  
allow N+1 operation. By connecting the CS signal between the paralleled units, automatic current balance is achieved,  
with +/-10% accuracy. For input voltages less than 100Vac, maximum output Power derated by 10% of the Power  
rating. Refer to Fig 13-1 for output Power derating in parallel operation.  
% of rated Power  
100  
90  
Input voltage  
(Vrms)  
265  
85  
100  
Fig 13-1: Output Power derating at parallel operation  
13.1.1 Parallel operation with Remote sensing  
Fig13-2 shows typical connection of parallel operation with Remote sensing. The CS signal wires should be as short  
aspossible and with the same length.  
+V  
+S  
FPS-S1U #1  
+S  
-S  
ON/ ON/ ON/  
OFF OFF OFF  
-S  
-V  
SIG.  
CS RTN  
A
B
C
+S  
9
11 5 15 25  
+V  
+S  
+V  
-V  
FPS-S1U #2  
+S  
-S  
LOAD  
ON/ ON/ ON/  
OFF OFF OFF  
-S  
-V  
SIG.  
CS RTN  
A
B
C
9
11 5 15 25  
-S  
+V  
+S  
FPS-S1U #3  
+S  
-S  
ON/ ON/ ON/  
OFF OFF OFF  
-S  
-V  
SIG.  
CS RTN  
A
B
C
9
11 5 15 25  
Fig 13-2: Parallel operation with Remote sensing  
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FPS-S1U Instruction Manual  
13.1.2 Output voltage trimming at parallel operation  
The output voltage of the units connected in parallel can be made by a single trimmer or resistive divider.  
7
1
10  
V_TRIM  
A, B, C  
FPS-S1U with FPS1000-12 installed:  
FPS-S1U # 1  
R2=0.0324*V2out -1.1298*Vout+9.9342  
ON/ ON/ ON/  
OFF OFF OFF  
+S  
V_TRIM  
SIG.  
RTN  
R1(KΩ)=5(KΩ)-R2(KΩ)  
-S  
A
B
C
CS  
V_TRIM  
9
5 15 25  
11  
V_TRIM  
FPS-S1U with FPS1000-24 installed:  
R2=0.0785*V2out -5.819*Vout+105.132  
R1(KΩ)=20(KΩ)-R2(KΩ)  
7
1
10  
+S  
R1  
V_TRIM  
V_TRIM  
V_TRIM  
A, B, C  
+V  
-V  
FPS-S1U # 2  
+S  
-S  
ON/ ON/ ON/  
OFF OFF OFF  
FPS-S1U with FPS1000-32 installed:  
R2=0.0463*V2out -4.5805*Vout+109.49  
R1(KΩ)=20(KΩ)-R2(KΩΩ)  
SIG.  
RTN  
R2  
-S  
A
B
C
CS  
5
15 25  
9
11  
7
1
10  
V_TRIM  
A, B, C  
FPS-S1U with FPS1000-48 installed:  
R2=0.0497*V2out-7.2795*Vout+259.04  
R1(KΩ)=50(KΩ)-R2(KΩ)  
FPS-S1U # 3  
ON/+S  
ON/ ON/  
OFF OFF OFF  
SIG.  
RTN  
-S  
CS  
A
B
C
9
5
15 25  
11  
Fig 13-3: Output voltage trimming at parallel operation  
13.1.3 Signal Return bus at parallel operation  
The Signal Return of each paralleled FPS-S1U rack can be connected together to form a common Signal Return  
bus. By this way, the control and monitoring signals of the paralleled racks can be connected to the same control  
and monitoring circuitry. The Signal Return bus can be connected to the -V or -S or +V or -S or float. Fig 13-4 shows  
typical connection of the Signal Return at parallel operation.  
FPS-S1U #1  
AC_FAIL  
DC_OK  
OVER-TEMP  
ALARM  
11  
SIG.  
RETURN  
FPS-S1U #2  
CONTROL AND  
AC_FAIL  
DC_OK  
MONITORING CIRCUITS  
OVER-TEMP  
ALARM  
11  
SIG.  
RETURN  
FPS-S1U #1 SIGNALS  
FPS-S1U #2 SIGNALS  
FPS-S1U #3 SIGNALS  
FPS-S1U #3  
AC_FAIL  
DC_OK  
OVER-TEMP  
ALARM  
11  
SIG.  
RETURN  
SIGNALS RETURN  
Fig 13-4: Signal Return connection at parallel operation  
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13.1.4 Remote On/Off control at parallel operation  
The paralleled racks can be turned On or Off via a single On/Off control. Refer to Fig 13-5 for typical application.  
The Signal Return function of all the paralleled racks should be connected together to create a common Signal  
Return bus. The Signal Return bus may be connected to the -V or the +V potential or floated. In any case do not  
connect the Signal Return bus to different potentials.  
ON/OFF  
A, B, C  
5, 15, 25  
FPS-S1U #1  
2.6 mA / Installed unit  
SIG.  
RETURN  
11  
2.6 mA / Installed unit  
ON/OFF  
A, B, C  
5, 15, 25  
11  
FPS-S1U #2  
ON  
OFF  
SIG.  
RETURN  
5, 15, 25  
ON/OFF  
A, B, C  
FPS-S1U #3  
2.6 mA / Installed unit  
11  
SIG.  
RETURN  
Fig 13-5: Remote On/Off control at parallel operation  
13.2 Series operation  
Two FPS-S1U racks with the same output voltage rating can be connected in series to increase the output voltage  
or to create a bipolar voltage source. It is recommended to connect diodes in parallel with each output to prevent  
reverse voltage in case of failure in one of the power supplies.  
Each diode should be rated to at least the power supply rated output voltage and output current.  
Refer to Fig 13-6 and 13-7 for a typical series connection of power supplies.  
CAUTION  
Series operation is not applicable for units with I2C bus option.  
+S  
FPS-S1U #1  
+V  
+S  
(*)  
-V  
-S  
ON/ ON/ ON/  
OFF OFF OFF  
SIG.  
RTN  
A
B
C
+V  
-V  
11 5 15 25  
LOAD  
+S  
+V  
FPS-S1U #2  
(*)  
ON/ ON/ ON/  
OFF OFF OFF  
-V  
-S  
-S  
SIG.  
RTN  
A
B
C
11 5 15 25  
(*) Diodes are user supplied  
Fig 13-6: Series connection for increased output voltage  
+S  
+V  
FPS-S1U #1  
(*)  
ON/ ON/ ON/  
OFF OFF OFF  
-V  
-S  
SIG.  
RTN  
A
B
C
+V  
LOAD  
11 5 15 25  
COMMON  
+S  
+V  
-V  
FPS-S1U #2  
(*)  
ON/ ON/ ON/  
OFF OFF OFF  
-V  
-S  
SIG.  
RTN  
A
B
C
11 5 15 25  
(*) Diodes are user supplied  
Fig 13-7: Series connection for Bipolar output voltage  
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FPS-S1U Instruction Manual  
CHAPTER 14  
FPS-S1U I2C BUS INTERFACE OPTION  
14.1 Introduction  
The FPS-S1U rack provides access to the I2C Bus interface in each installed FPS1000/S unit via the rear  
panel DB25 female connector located at the rear panel. The Clock is connected to pin 20 and the Data  
is connected to pin 21. The specifications of the I2C of the FPS1000/S power supplies are kept when they  
are installed in the FPS-S1U rack. Refer to Chapter 7 for the specifications and all operating details.  
14.2 Addressing (A0, A1, A2).  
The rear panel 9 positions DIP switch is used to select the I2C bus address for the individual FPS1000/S  
unit inside the rack. Each unit should have its own I2C address to communicate over the I2C bus.  
Each address is made of three DIP switch positions, thus a single power supply in the FPS-S1U can be  
addressed with one of 8 different addresses.  
Refer to Fig 14-1 for the description of the DIP switch setting. The DIP switch down position is logic level  
"1" and the up position is logic level "0".  
ON  
1
2
3
4
5
6
7
8
9
OFF  
Module C  
Module B  
Module A  
Fig 14-1: Address setting DIP switch (rear panel view)  
CAUTION  
The I2C bus address lines, serial clock and data are  
referenced to the -Sense potential. When using series  
connection of FPS-S1U racks, do not connect the  
I2C lines of the units together.  
37  
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CHAPTER 15 FPS-S1U MAINTENANCE  
15.1 Introduction  
This chapter contains information about maintenance, calibration and troubleshooting of the FPS-S1U  
rack.  
15.2 Units under warranty  
Units requiring repairs during the warranty period should be returned to Densei-Lambda authorized service  
office. Unauthorized repairs performed by other than the authorized service facilities may void the warranty.  
15.3 Periodic maintenance  
No routine maintenance of the FPS-S1U rack is required except for periodic cleaning. To clean, disconnect  
the unit from the AC supply and allow 30sec. for discharging internal voltage. The FPS-S1U should be  
cleaned using mild solution of detergent and water. The solution should be applied onto a soft cloth, and  
not directly to the surface of the unit. Do not use aromatic hydrocarbons or chlorinated solvents for cleaning.  
Use low pressure compressed air to blow dust from the unit.  
15.4 Adjustments and Calibration  
No internal adjustment or calibration are required. Units that are returned for repair will be calibrated at  
the service office In any case ,opening the cover is not allowed.  
15.5 Parts replacement and repair  
As repairs are made only by the manufacturer or by its authorized service offices, no parts replacement  
information is given in this manual. In case of failure, unusual or erratic operation of the unit, contact your  
nearest Densei-Lambda sales and service office.  
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FPS-T1U 19” Rack Triple Output  
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CHAPTER 16  
FPS-T1U RACK SPECIFICATIONS  
1
2
3
4
5
6
7
8
9
Number of power supply modules (*1)  
---  
Maximum 3 x FPS1000 modules.  
3000  
Maximum output power  
(*2)  
(*3)  
W
---  
A
Input voltage / frequency range  
85~265Vac continuous, 47~63Hz, Single phase  
12.0/6.0 for each FPS1000 unit installed  
FPS-T1U :IEC inlet for each power supply module . FPS-T1U/P :None  
Bus-bars.Refer to outline drawing.  
Maximum input current (at 100/200Vac)  
AC input connector  
---  
---  
V
Output terminals  
Remote sensing  
Parallel operation  
Series operation  
(*4)  
Possible.  
---  
---  
Possible. Up to 3 racks with max 8FPS 1000 units of the same voltage and current rating.  
Possible. Up to 3x FPS1000 units of the same voltage and current rating  
Separate control for each FPS 1000 unit , By electrical signal or dry contact  
On/Off logic is user selectable. Refer to instruction manual.  
Separate control for each FPS1000 unit, Open collector signal.  
On when Vout >80% +/-5%. Max.sink current: 10mA  
Separate control for each FPS1000 unit ,Open collector signal.  
Refer to Instruction Manual  
(*5)  
(*6)  
10 Remote On/Off control  
11 DC_OK signal  
---  
---  
---  
---  
12 AC fail signal  
Separate control for each FPS1000 unit ,Open collector signal.  
Refer to Instruction Manual  
13 Over Temperature alarm signal  
14 Vout voltage trimming  
15 Auxiliary power supply  
16 Operating temperature  
17 Storage temperature  
18 Operating humidity  
19 Storage humidity  
20 Vibration  
---  
---  
---  
---  
---  
---  
---  
---  
---  
Possible, via separate control for each FPS1000 unit .Refer to Instruction Manual.  
11.2~12.5VDC.Maximum output current:0.25A, for each FPS1000 unit.  
0~50°C: 100% load. Derate 2%/°C, 50°C to 60°C.  
-30~85°C  
10~90% RH, no condensation.  
10~95% RH, no condensation.  
Built to meet ETS 300 019  
21 Shock  
Built to meet ETS 300 019  
22 Applicable safety standards  
UL60950-1, EN60950-1  
Input-Output: 3000Vrms, 1min. Input-Ground: 2000Vrms, 1min. Output-Ground:  
1414Vdc, 1min.  
23 Withstand voltage  
---  
24 Insulation resistance  
25 Weight (Typ)  
26 Size (W*H*D)  
27 Warranty  
---  
Kg  
---  
Yr  
More than 100Mohm at 25°C and 70% RH. Output-Ground: 500Vdc  
3.7  
440x44x351mm. Refer to Outline Drawing.  
Two Years  
Notes:  
*1: The Output of all the FPS1000 modules are floating in the rack.  
*2: For input voltage lower than 100Vac, maximum output power derated by 10% of the power rating.  
*3: For cases where conformance to to various safety standards (UL, EN etc.) is required, to be described  
as 100-240Vac (50/60Hz).  
*4: Remote sensing can compensate up to 1V drop on each load wire.  
*5: Not apllicable for units with I2C bus option.  
*6: Factory default: ON/OFF_1 P.S. is On when AC is applied.  
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FPS-T1U Instruction Manual  
CHAPTER 17  
17.1 GENERAL  
FPS-T1U RACK INSTALLATION  
This chapter contains instructions for initial inspection, preparation for use and repackaging for shipment.  
In some sections in this chapter, where the instructions for the FPS-T1U and the FPS1000 are identical,  
a reference to a section describing the FPS1000 will be given.  
17.2 PREPARATION FOR USE  
Table 10-1 below describes the basic setup procedure. Follow the instructions in Table 17-1 in the sequence  
given to prepare the FPS-T1U rack for use.  
Step no Item  
Description  
Reference  
Section 3.3  
Section 10.4  
Section 10.5  
Section 3.6  
Section 10.7  
1
2
Inspection  
Installation  
Initial physical inspection of the power supply  
Installing the power supply.  
Ensuring adequate ventilation.  
AC source requirements  
Wire size selection.  
3
4
AC source  
Load connection  
Table 17-1: Basic setup procedure  
17.3 INITIAL INSPECTION  
Refer to Sec. 3.3 for details.  
17.4 FPS-T1U RACK MOUNTING  
The FPS-T1U is designed to be mounted in a 19" rack. Use a support bars or surface to provide adequate  
support for the rear of the power supply. Secure the FPS-T1U to its location using the front panel using  
M6x12 screws via the mounting holes at its front side (Refer to the outline drawings in Chapter 18).  
Do not obstruct the air exhaust at the rear panel of the unit.  
17.5 LOCATION MOUNTING AND COOLING  
The FPS1000 units installed in the FPS-T1U rack are fan cooled. The air intake is at the front panel and  
the exhaust is at the rear panel. Upon installation allow cooling air to reach the front panel and allow  
minimum 50mm of unrestricted air space at the rear of the unit for the air exhaust.  
17.6 AC SOURCE REQUIREMENTS  
Refer to Sect 3.6 for details.  
17.7 CONNECTING THE LOAD  
WARNING  
Turn off the AC input power before making or changing any rear panel connection.  
Ensure that all connections are securely tightened before applying power. There is a  
potential shock hazard when using a power supply with a rated output greater than 40V.  
17.7.1 Load Wiring  
Refer to Sec. 3.7.1, 3.7.2 and 3.7.3 for details.  
17.7.2 Inductive loads  
To prevent damage to the power supply from inductive kickback, a diode should be connected across the  
output. The diode voltage and current rating should be greater than the power supply maximum output  
voltage and total current rating. Connect the cathode to the positive output and the anode to the negative  
output. Where positive load transients such as back EMF from a motor may occur, connect a surge  
suppressor across the output to protect the power supply. The breakdown voltage rating of the suppressor  
must be approximately 10% higher than the maximum output voltage of the power supply.  
41  
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17.7.3 Making the load connections  
WARNING  
!
Hazardous voltages may exist at the outputs and the load connections  
when using a power supply with a rated output greater than 40V. To  
protect personnel against accidental contact with hazardous voltages,  
ensure that the load and it's connections has no accessible live parts.  
Ensure that the load wiring insulation rating is greater than or equal to  
the maximum output voltage of the power supply.  
The load wires should be properly terminated with terminals securely attached. DO NOT use unterminated  
wires for load connection at the FPS-T1U.  
17.7.4 Rear panel description  
1
2
3
4 5  
1
Module C  
Module B  
Module A  
Fig. 17-1: FPS-T1U Rear panel  
1. Mounting brackets. Use M6x12 screws to fix the FPS-T1U to the rack.  
2. Output voltage terminals rugged busbars. Use M5x12 screws for load wires recommended  
Tightening torque 24~31 Kgf.cm.  
3. Micro-Fit 3.0TM Dual Row Right Angle 16pins (Molex) connector for control and monitoring signals.  
4. Ground stud M4 (three place).  
5. IEC320 AC inlet ,shown for FPS-T1U. For FPS-T1U/P there are no IEC320 inlets on the rack.  
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17.7.5 Rear Panel In/Out Connector Pins Function Description J1(A), J2(B), J3(C)  
Pin No  
1
Function  
Description  
Serial Data used in the I2C interface option. Refer to the I2C interface description in the  
FPS1000 Instruction Manual.  
SDA (I2C)  
Serial Clock used in the I2C interface option. Refer to the I2C interface description in the  
FPS1000 Instruction Manual.  
2
3
SCL (I2C)  
Return for the following control and supervisory signals: On/Off, DC_OK, Over_temperature  
Alarm, AC_Fail, Auxiliary 12V supply. The Signal return is isolated from the output terminals.  
SIGNAL_RETURN  
On/Off control. To use this input, pin#12 and pin#13 must be shorted together.  
Short between On/Off_2 to pin#3: Off. Open On/Off_2: On.  
The maximum source current is 1.2mA  
ON/OFF_2 (*1)  
DC_OK  
4
5
6
7
8
Open collector signal, referenced to pin 3 (Signal Return). On when the output  
voltage of FPS1000 unit is higher than Vout ≥ 80% +/-5%.The maximum sink current:  
10mA and the maximum external voltage is 15V.  
Connection for output voltage trimming of FPS1000 unit. The voltage can be trimmed within  
its range specifications.  
V_TRIM  
Negative sensing. The -Sense signal should be connected to the negative terminal of the load.  
The -Sense and +Sense leads should be twisted pair to minimize noise pick-up effect. The  
maximum load wires drop compensation is 1V/wire.  
-SENSE  
Positive sensing. The +Sense signal should be connected to the positive terminal of the load.  
The +Sense and -Sense leads should be twisted pair to minimize noise pick-up effect. The  
maximum load wires drop compensation is 1V/wire.  
+SENSE  
Auxiliary voltage output, 11.2~12.5V, referenced to pin 3 (Signal Return). The maximum  
load current is 0.25A. This output is not controlled by the On/Off control.  
9
+12V_AUX  
CS  
Current sharing signal. When FPS1000 units are connected in parallel, the CS pins of the  
units should be connected to allow current balance between units.  
10  
11  
Open collector signal, referenced to pin 3 (Signal Return). On when the input voltage of  
FPS1000 unit is ≥85Vrms. The maximum sink current is 10mA, and the maximum external  
voltage is 15Vdc.  
AC_FAIL  
Turns the output of FPS1000 unit to On and Off by electrical signal or dry contact between  
pin 12 and pin 3 (Signal Return). 0~0.6V or Short: On, 2~15V or Open: Off.  
12  
ON/OFF_1 (*1)  
The maximum sink current is 2.6 mA (when using pin#12, it should be disconected from pin#13).  
Input used to select the On/Off control logic.  
Short this input to pin#12 when using On/Off_2 as On/Off control.  
Leave this input open when using On/Off_1 as On/Off control.  
ON/OFF LOGIC  
SELECT  
13  
14  
Open collector signal, referenced to pin 3 (Signal Return). On when the internal temperature  
of FPS1000 unit is within safe limit, Off approx. 10°C below Thermal shut down.The maximum  
sink current is 10mA and the maximum external voltage is 15V.  
TEMP_ALARM  
When working in local sense mode, connect -Local Sense to -Sense (pin#7).  
When working in Remote sense mode, this input should be open.  
15  
16  
- LOCAL SENSE  
+ LOCAL SENSE  
When working in local sense mode, connect +Local Sense to +Sense (pin#8).  
When working in Remote sense mode, this input should be open.  
Rear In/Out connector pins function description (J1), (J2), (J3)  
Note:  
*1: On/Off_1 and On/Off_2 are reversed logic inputs.  
CONNECTOR PINOUT (REAR PANEL VIEW)  
16  
9
J1(A), J2(B), J3(C) CONECTOR DESCRIPTION  
MALE HEADER:  
FEMALE HOUSING (PLUG):  
FEMALE TERMINAL:  
P/N-43045-1600 (MOLEX)  
P/N-43025-1600 (MOLEX)  
P/N-43030 (MOLEX)  
8
1
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17.7.6 Modules location  
Up to three FPS1000 modules can be plugged into an FPS-T1U rack.  
Refer to Fig 17-2 for the modules location.  
PS MODULE “A”  
PS MODULE “B”  
Air flow direction  
Front side  
see note 1  
PS MODULE “C”  
Fig 17-2: FPS1000 modules location  
Note 1: Forced air cooling allow minimum 50mm of unrestricted air space at the rear of the unit. Do not  
obsruct air flow to the unit front panel.  
17.7.7 Blank panels  
Each FPS-T1U rack is supplied with two blank panels in the package. Use the blank panels to close the  
front panel opening in places where FPS1000 power supplies are not installed. Use M3x6 screws to fix  
the blank panel to the chassis. Refer to the outline drawings in chapter 18 for details.  
17.7.8 Repackaging for shipment  
Refer to Sec. 3.7.8 for details.  
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FPS-T1U Instruction Manual  
CHAPTER 18 FPS-T1U AND FPS-T1U/P OUTLINE DRAWINGS  
18.1 FPS-T1U Outline Drawing  
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18.2 FPS-T1U/P Outline Drawing  
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FPS-T1U Instruction Manual  
CHAPTER 19 BASIC CONNECTIONS FOR OPERATION FPS-T1U RACK  
19.1 Connecting Single Load, Remote Sensing  
Remote sensing is used in cases where the load regulation is important at the load terminals. Use twisted  
or shielded wires to minimize noise pick-up. If shielded wires are used, the shield should be connected  
to the ground at one point, either the power supply side or the load. The optimal point for the shield ground  
should be determined by experimentation. Refer to the power supply specifications for the maximum  
voltage drop allowed at the load wires.  
Load line. Up to 1V drop.  
+V  
+S  
+V  
FPS-T1U  
J1-8  
J1-7  
LOAD  
LOAD  
LOAD  
FPS-1000 Module A  
-S  
-V  
-V  
+V  
+S  
+V  
FPS-1000 Module B  
J2-8  
J2-7  
-S  
-V  
-V  
+V  
+S  
+V  
FPS-1000 Module C  
J3-8  
J3-7  
ON/  
OFF_1  
C
ON/  
OFF_1  
A
ON/  
OFF_1  
B
-S  
-V  
-V  
Load line.  
Up to 1V drop.  
Sense lines  
Twisted pairs  
Fig 19-1: Remote sensing, three load.  
In Local sense applications, the +/- sense have to be connected to the  
+/-Local Sense terminals of the FPS-T1U prior to operating the FPS1000 units plugged in.  
*
19.2 On/Off control  
Fig 19-2 and Fig 19.3 shows typical connection for individual On/Off control of each installed FPS1000 unit.  
ON/OFF Control_1  
FPS-T1U  
ON/OFF Control_2  
FPS-T1U  
J1(A)-12  
J1(A)-4  
OFF  
ON  
OFF  
ON  
ON  
ON  
FPS-1000 Module A  
FPS-1000 Module A  
J1(A)-3  
J1(A)-3  
J2(B)-4  
J2(B)-12  
FPS-1000 Module B  
FPS-1000 Module C  
FPS-1000 Module B  
ON  
OFF  
OFF  
J2(B)-3  
J2(B)-3  
J3(C)-4  
J3(C)-12  
FPS-1000 Module C  
ON/  
OFF1  
C
ON/ ON/  
ON/  
OFF  
SLCT  
ON/  
OFF  
SLCT  
ON/  
OFF1  
B
ON  
OFF  
OFF  
OFF1 OFF  
A
SLCT  
J3(C)-3  
J3(C)-3  
Fig 19-2  
Fig 19-3  
Connection for negative logic:  
Closed: On  
Open: Off  
Connection for positive logic:  
Closed: Off Open: On  
Factory default: ON/OFF Control_1  
47  
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19.3 Output Voltag Trimming  
Fig 19-4 shows typical output voltage trimming connection for FPS1000 unit ‘A’ inside the rack  
Units ‘B’ and ‘C’ connections - Refer to 17.7.5  
J1(A)  
FPS1000-12:  
FPS-T1U  
R2=0.0324*V2out -1.1298*Vout+9.9342  
R1(KΩ)=5(KΩ)-R2(KΩ)  
J1(A)-8  
+S  
V_TRIM  
-S  
FPS1000  
Module A  
R1  
R2  
J1(A)-6  
FPS1000-24:  
R2=0.0785*V2out -5.819*Vout+105.132  
R1(KΩ)=20(KΩ)-R2(KΩ)  
J1(A)-7  
R1&R2:0.5W  
FPS1000-32:  
R2=0.0463*V2out -4.5805*Vout+109.49  
R1(KΩ)=20(KΩ)-R2(KΩΩ)  
FPS-1000 Module B  
FPS-1000 Module C  
J2(B)  
J3(C)  
FPS1000-48:  
R2=0.0497*V2out-7.2795*Vout+259.04  
R1(KΩ)=50(KΩ)-R2(KΩ)  
Fig 19-4 Output Voltag Trimming  
19.4 Supervisory Signals  
Signals are accessible at the J1(A), J2(B), J3(C) connectors on the rear panel of the rack  
Fig 19-5 shows typical connection for FPS1000 unit ‘A’. inside the rack  
Units ‘B’ and ‘C’. connections - Refer to 17.7.5  
J1(A)  
9
FPS-T1U  
12V AUX  
AC_FAIL_A  
FPS1000  
Module A  
10K 10K  
11  
5
Application  
Monitoring  
and Control  
circuits  
DC_OK_A  
10K  
14  
3
TEMP.ALARM_A  
SIGNAL RET  
FPS-1000 Module B  
FPS-1000 Module C  
J2(B)  
J3(C)  
Fig 19-5 Supervisory Signals  
Note: AC_FAIL, DC_OK and TEMP.ALARM are open collector signals  
19.5 Grounding outputs  
Either the positive or negative output terminals can be grounded. To avoid noise problems caused by  
common-mode current flowing from the load to ground, it is recommended to ground the output terminal  
as close as possible to the power supply's output. Always use two wires to connect the load to the power  
supply regardless of how the system is grounded.  
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FPS-T1U Instruction Manual  
CHAPTER 20 PARALLEL AND SERIES OPERATION  
20.1 Parallel operation  
Up to 3 x FPS-T1U racks with up to 8 x FPS1000 installed units of the same output voltage rating can be connected  
in parallel. The built-in Oring diodes on the main output and on the +12V auxiliary voltage in each FPS1000 unit  
allow N+1 operation. By connecting the CS signal between the paralleled units, automatic current balance is achieved,  
with +/-10% accuracy. For input voltages less than 100Vac, maximum output Power derated by 10% of the Power  
rating. Refer to Fig 20-1 for output Power derating in parallel operation.  
% of rated Power  
100  
90  
Input voltage  
(Vrms)  
265  
85  
100  
Fig 20-1  
20.1.1 Parallel operation with Remote sensing  
Fig 20-2 shows typical connection of parallel operation with Remote sensing. The CS signal wires should be as short  
aspossible and with the same length.  
+V  
+S  
FPS-T1U  
+S  
-S  
-S  
-V  
FPS-1000 Module A  
CS  
+S  
+V  
+S  
+V  
-V  
+S  
-S  
LOAD  
FPS-1000 Module B  
FPS-1000 Module C  
-S  
-V  
CS  
CS  
-S  
+V  
+S  
+S  
-S  
ON/  
OFF_1  
C
ON/  
OFF_1  
A
ON/  
OFF_1  
B
-S  
-V  
Fig 20-2 Parallel operation with Remote sensing  
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20.2 Series operation  
Up to three FPS1000 with the same output voltage rating can be connected in series to increase the output voltage  
or to create a bipolar voltage source. It is recommended to connect diodes in parallel with each output to prevent  
reverse voltage in case of failure in one of the power supplies.  
Each diode should be rated to at least the power supply rated output voltage and output current.  
Refer to Fig 20-3 for a typical series connection of power supplies.  
CAUTION  
Series operation is not applicable for units with I2C bus option.  
FPS-T1U  
+S  
+V  
+S  
(*)  
FPS-1000 Module A  
-V  
-S  
+V  
-V  
LOAD  
+S  
+V  
FPS-1000 Module B  
FPS-1000 Module C  
(*)  
(*)  
-V  
-S  
-S  
+S  
+V  
(*) Diodes are user supplied  
ON/  
OFF_1  
ON/  
OFF_1  
A
ON/  
OFF_1  
B
-V  
-S  
C
Fig 20-3 Series operation  
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FPS-T1U Instruction Manual  
CHAPTER 21  
FPS-T1U I2C BUS INTERFACE OPTION  
21.1 Introduction  
The FPS-T1U rack provides access to the I2C Bus interface in each installed FPS1000/S unit via the rear  
panel MOLEX female connector located at the rear panel. The Clock is connected to pin 2 and the Data  
is connected to pin 1. The specifications of the I2C of the FPS1000/S power supplies are kept when they  
are installed in the FPS-T1U rack. Refer to Chapter 7 for the specifications and all operating details.  
21.2 Addressing (A0, A1, A2).  
The address line of the FPS1000/S units installed in the FPS-T1U rack are internally fixed  
Refer to the following table for detailes:  
A0  
1
A1  
1
A2  
1
Module “A”  
Module “B”  
Module “C”  
0
1
1
1
0
1
Note: Address are applicable when modules FPS1000/S (I2C option) are used  
CAUTION  
The I2C bus address lines, serial clock and data are  
referenced to the -Sense potential. When using series  
connection of FPS-T1U racks, do not connect the  
I2C lines of the units together.  
51  
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CHAPTER 22 FPS-T1U MAINTENANCE  
22.1 Introduction  
This chapter contains information about maintenance, calibration and troubleshooting of the FPS-T1U  
rack.  
22.2 Units under warranty  
Units requiring repairs during the warranty period should be returned to Densei-Lambda authorized service  
office. Unauthorized repairs performed by other than the authorized service facilities may void the warranty.  
22.3 Periodic maintenance  
No routine maintenance of the FPS-T1U rack is required except for periodic cleaning. To clean, disconnect  
the unit from the AC supply and allow 30sec. for discharging internal voltage. The FPS-T1U should be  
cleaned using mild solution of detergent and water. The solution should be applied onto a soft cloth, and  
not directly to the surface of the unit. Do not use aromatic hydrocarbons or chlorinated solvents for cleaning.  
Use low pressure compressed air to blow dust from the unit.  
22.4 Adjustments and Calibration  
No internal adjustment or calibration are required. Units that are returned for repair will be calibrated at  
the service office In any case ,opening the cover is not allowed.  
22.5 Parts replacement and repair  
As repairs are made only by the manufacturer or by its authorized service offices, no parts replacement  
information is given in this manual. In case of failure, unusual or erratic operation of the unit, contact your  
nearest Densei-Lambda sales and service office.  
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Notes  
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Notes  
56  
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