Omega Vehicle Security Welding System DRA RTM 8 User Manual

Use r’s Gu id e  
http://www.omega.com  
e-mail: info@omega.com  
DRA-RTM-8  
AN ALO G MULTIPLEXER  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Contents  
1. GENERAL DESCRIPTION  
2. MOUNTING INSTRUCTIONS  
3. REPLACING FUSES  
4. ASSEMBLY  
5. CURRENT INPUTS  
6. CONNECTING TRANSMITTERS TO THE MULTIPLEXER  
7. CONNECTING Pt-100 TO THE MULTIPLEXER  
8. CONNECTING THE MULTIPLEXER TO A PLC  
9. CONTROL  
9.1 Enable  
9.2 Address  
9.3 Address Polarity  
9.4 Control Tables  
10. CALIBRATION  
10.1 Calibration Procedure  
10.2 Calibration Tables  
10.2.1 "ZERO" - Coarse Calibration Tables  
10.2.2 "SPAN" - Coarse Calibration Tables  
11. MULTIDROP CONFIGURATION  
12. SPECIFICATIONS  
1
Download from Www.Somanuals.com. All Manuals Search And Download.  
1. GENERAL DESCRIPTION  
The DRA-RTM-8 is a multiplexer for 16 analog inputs - eight of which, marked  
1-8, are direct inputs for Pt-100 sensors, while the remaining (9-16), are for 4-  
20mA current loops.  
The DRA-RTM-8 output format is a 4-20mA current loop, with a 28mA limitation.  
Each Pt-100 input has its own signal conditioner, allowing each input to be  
calibrated separately. Each signal conditioner includes six DIP switches for coarse  
calibration and two potentiometers for fine tuning.  
2. MOUNTING INSTRUCTIONS  
The DRA-RTM-8 is designed for standard DIN rail mounting.  
Place the unit on the upper part of the mounting rail with the fastening tab facing  
down. Using a suitable flat screwdriver loosen the tab slightly and attach the unit  
to the rail. Once the tab is loosened, ensure that the unit is fastened securely in  
place.  
3. REPLACING FUSES  
To replace a blown fuse, disassemble the unit as follows:  
a. Take off both terminal strips by removing the four screws at the edges.  
Note: This does not require disconnecting the cables connected to the strips.  
b. Remove the front panel using a suitable flat screwdriver. Press down gently on  
the plastic springloaded tabs located in the slots on either side of the unit.  
c. Disconnect the flat connectors which connects the front panel printed circuit.  
d. Replace the blown fuse.  
WARNING: Never install a fuse rated more than 800mA  
4. ASSEMBLY  
The DRA-RTM-8 unit includes two printed circuit cards designated as P.N 7020  
and P.N 7021. The two printed circuit cards should occupy the slots in the  
enclosure according to fig 1.  
2
Download from Www.Somanuals.com. All Manuals Search And Download.  
Insert the two printed cards into their slots.  
Connect the flat cable between them.  
Connect the front panel flat cables. The  
panel must be inserted into the grooves on  
both sides of the case while pressing down  
until a distinct "click" is heard. Assembly is  
completed by laying the terminal strips in  
place.  
Figure 1.  
Note: The terminal strips are polarized and must not be placed backwards.  
5. CURRENT INPUTS  
The eight 4-20mA current inputs are marked as channels 9-16. These inputs are  
for current only. The "COM" input is the return for all the current channels. It is  
possible to connect any current source, as long as a closed loop is maintained.  
WARNING: Voltage sources should not be connected to the current  
inputs,as permanent damage might occur.  
6. CONNECTING TRANSMITTERS TO THE MULTIPLEXER  
6.1 TWO WIRE TRANSMITTER  
A Two-Wire transmitter is connected so that its  
positive terminal is connected to the positive  
terminal of the power supply, and its negative  
terminal is connected to the "I" terminal.  
(see fig 2)  
Figure 2.  
6.2 FOUR WIRE TRANSMITTER  
A Four-Wire transmitter is connected so that its  
positive terminal is connected to the "I" terminal,  
and its negative terminal is connected to the  
"COM" terminal. (see fig 3)  
3
Figure 3.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
7. CONNECTING Pt-100 TO THE MULTIPLEXER  
The Pt-100 probe should be connected according to fig 4. The  
three wires connecting the probe should be identical.  
The distance of the probe can be up to 200 meters.  
A shielded cable is recommended.  
The shield should be grounded at one point. When possible,  
connect the ground at the multiplexer's end.  
Figure 4.  
8. CONNECTING THE DRA-RTM-8 TO A PLC  
The multiplexer output should be connected to 4-20mA input of the PLC analog  
module (see fig 5).  
The DRA-RTM-8 multiplexer generates the output current, therefore the PLC analog  
module should be configured for four wire transmitter connection.  
WARNING: NEVER apply 24Vdc to the DRA-RTM-8's +Io terminal  
as in two-wire connection, and make sure that the PLC's  
analog module is configured as a passive input.  
9. CONTROL  
The DRA-RTM-8 unit is controlled via four  
address lines and one E (Enable) line.  
The control terminals (Address and  
Enable), were designed to receive control  
signals from TTL levels up to 60V so that  
almost any PLC's DC output module can  
be used. (see fig 5)  
Figure 5.  
9.1 ENABLE  
The unit is enabled when a logical "1" (5V < E < 60V) is connected to the E  
Terminal. In a disabled state, the DRA-RTM-8 outputs no current and reflects a  
Hi-Z state. This feature allows the connection of several DRA-RTM-8 units by tying  
their outputs and control in parallel and addressing them by controlling the  
individual Enable terminals.  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
9.2 ADDRESS  
The required channel is selected by  
four address lines.  
The operating voltages are:  
Logical "1" 5V < Vi < 60V  
Logical "0" 0V < Vi< 0.5V  
Figure 6.  
9.3 ADDRESS POLARITY (see fig 6)  
Address polarity is controlled by three internal pins and a jumper over two of them,  
located on PN 7021 printed circuit board, accessible behind the Enable terminal.  
The unit is supplied with the jumper set for "true high" control logic, i.e. "0000"  
selects channel #1, and "1111" selects channel #16.  
Moving the jumper to the second alternative, reverses the logic.  
Note: If the address contros voltages are generated from different power  
supplies, then its negative terminal should be connected to the  
DRA-TM-8's "COM" terminal.  
9.4 CONTROL TABLES  
9.4.1 "TRUE LOW" SETTING  
ADDRESS BUS  
A3 A2 A1 A0  
ADDRESS BUS  
A3 A2 A1 A0  
OUTPUT  
CHANNEL  
OUTPUT  
CHANNEL  
E
E
0
0
0
0
0
0
0
0
x
0
0
0
0
1
1
1
1
x
0
0
1
1
0
0
1
1
x
0
1
0
1
0
1
0
1
x
1
1
1
1
1
1
1
1
0
16  
1
1
1
1
1
1
1
1
x
0
0
0
0
1
1
1
1
x
0
0
1
1
0
0
1
1
x
0
1
0
1
0
1
0
1
x
1
1
1
1
1
1
1
1
0
8
15  
7
14  
6
13  
5
12  
11  
4
3
10  
2
9
1
NO OUTPUT  
NO OUTPUT  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
9.4.2 "TRUE HIGH" SETTING  
ADDRESS BUS  
A3 A2 A1 A0  
OUTPUT  
CHANNEL  
ADDRESS BUS  
A3 A2 A1 A0  
OUTPUT  
CHANNEL  
E/ T  
E/ T  
0
0
0
0
0
0
0
0
x
0
0
0
0
1
1
1
1
x
0
0
1
1
0
0
1
1
x
0
1
0
1
0
1
0
1
x
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
1
x
0
0
0
0
1
1
1
1
x
0
0
1
1
0
0
1
1
x
0
1
0
1
0
1
0
1
x
1
1
1
1
1
1
1
1
0
9
2
10  
3
11  
4
12  
5
6
13  
14  
7
15  
16  
8
TEST MODE  
TEST MODE  
Note: The unit includes three internal potentiometers. These potentiometers  
are carefully adjusted and sealed in the factory. It is not recommended  
to alter these calibration potentiometers.  
10. CALIBRATION  
To calibrate the DRA-RTM-8, the limits must be defined.  
Tmin is the temperature at which the output current is 4mA.  
Tmax is the temperature at which the output current is 20mA.  
Tspan is the difference between Tmax and Tmin.  
10.1 CALIBRATION PROCEDURE  
a. Remove the terminal strips to get access to the coarse calibration switches.  
b. Set the channels DIP switches to the desired calibration ranges according to the  
calibration tables.  
c. Re-install the terminals strips. The terminal strips are polarized and should be  
returned to their original position.  
d. Connect a Pt-100 calibrator* set for Tmin to the proper input terminals.  
e. Apply the proper channel selection code by connecting those which according  
the table should be "1" to the +PWR terminal.  
f. Start calibrating by adjusting the proper "Z" potentiometer to obtain an output  
current of 4.000mA.  
g. Set the calibrator for Tmax and adjust the "S" potentiometer to obtain an output  
current of 20.000mA.  
h. Repeat this procedure until satisfactory results are obtained.  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
i. Change the address to the next channel to be calibrated.  
j. Repeat steps b to h  
* The calibrator is set according to DIN 43760 Pt-100 table (a = 0.00385)  
10.2 CALIBRATION TABLES  
Note: Logic state of "0" is when the DIP switch lever is down.  
10.2.1 "ZERO" - COARSE CALIBRATION TABLES  
CHANNELS 1-4  
CHANNELS 5-8  
O
ZERO TEMP C  
SW6 SW5 SW4  
SW1 SW2  
SW3  
1
1
1
1
0
0
1
1
0
0
-50.....10  
8.....75  
1
1
1
0
0
1
1
0
0
1
1
1
1
0
0
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
74...140  
1
1
139...206  
205...272  
270...338  
336...404  
401...470  
0
0
0
0
10.2.2 "SPAN" - COARSE CALIBRATION TABLES  
CHANNELS 1-4  
CHANNELS 5-8  
O
SPAN C  
SW1  
1
SW6  
1
SW2 SW3  
SW4  
1
SW5  
1
50.....76  
1
0
1
1
0
0
1
1
1
0
1
0
1
1
0
0
0
1
1
0
0
65...115  
1
0
0
1
0
1
110...180  
135...225  
215...440  
400...800  
0
0
0
0
0
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
11. MULTIDROP CONFIGURATION  
In the disabled state (E=0), the multiplexer outputs no current and exhibits a high  
Z state. This mode allows the connection of several DRA-RTM-8 units to one PLC's  
analog input, by tying their output terminals and the address lines in parallel, and  
applying individual Enable lines to select the desired multiplexer by disabling all  
but one (see fig 7).  
ANALOG  
ANALOG  
+
-
PLC  
ANALOG  
INPUT  
MODULE  
ENABL  
E
1
2
ENABL  
E
MSB  
DISCRETE  
OUTPUT  
MODULE  
LSB  
Figure 7.  
12. SPECIFICATIONS  
8, Pt-100 Channels a=0.00385  
ANALOG INPUTS:  
8, 0/ 4-20mA Channels  
RTD INPUT:  
50 to +200 oC  
Zero adjustability:  
Span adjustability:  
Lead Compensation Error:  
Max Lead Resistance:  
Pt-100 linearization:  
50 to 750 oC  
0.025 oC for 10W lead resistance  
120  
W
two ways  
0.1% of span max.  
CURRENT INPUT  
30 mA  
Max Input Current:  
Yes  
Reverse Polarity Protection:  
Output Accuracy (Refer to Current Input):  
0.1% of span max.  
4 Address  
1 Enable input  
CONTROL INPUTS:  
True High or True Low (User selectable)  
Low: "0" < 0.5V High: 5 < "1" < 60V  
Logic:  
Logic Levels:  
4-20mA, Current Loop  
OUTPUT:  
< 20mSec (into a resistive load)  
1 Yellow LED, Power-On indicator  
8 Red LEDs, current activity indicators  
SWITCHING TIME:  
INDICATORS:  
24 10% Vdc (regulated)  
120 mA 10mA  
SUPPLY VOLTAGE:  
SUPPLY CURRENT CONSUMPTION:  
FUSE:  
150 mA, Fast Blow (5x20mm)  
0.01% of span/ 1 oC  
TEMPERATURE STABILITY:  
OPERATING TEMPERATURE:  
STORAGE TEMPERATURE:  
HUMIDITY:  
0 to 60 oC (32 to 140 oF)  
-25 to +85 oC (-13 to 185 oF)  
5 to 95% Relative humidity, non-condensing  
Plastic Polycarbonate  
According to IP50 DIN 40050  
According to IP20 DIN 40050  
HOUSING:  
Box:  
Terminal:  
0.9 Kg. (2.0 lb.)  
WEIGHT:  
73Hx200Wx121mmD (2.88"x7.88"x4.76")  
DIMENSIONS:  
8
Download from Www.Somanuals.com. All Manuals Search And Download.  
WARRANTY/DIS CLAIMER  
OMEGA ENGINEERING, INC. w a rra n ts th is u n it to b e fre e o f d e fe cts in m a te ria ls a n d workm anship  
fo r a p e rio d o f 1 3 m o n t h s fro m d a te o f p u rch a s e . OMEGA Wa rra n ty a d d s a n a d d itio n a l o n e (1) m o n th  
g ra ce p e rio d to th e n o rm a l o n e (1 ) y e a r p r o d u c t w a r r a n t y to cover handling and shipping tim e. This  
ensures that OMEGA’s custom ers receive m axim um coverage on each product. If the unit should m alfunction,  
it m ust be returned to the factory for evaluation. OMEGAs Custom er Service Departm ent will issue an Authorized  
Return (AR) num ber im m ediately upon phone or written request. Upon exam ination by OMEGA, if the unit is  
found to be defective it will be repaired or replaced at no charge. OMEGAs WARRANTY does not apply to defects  
resulting from any action of the purchaser, including but not lim ited to m ishandling, im proper interfacing,  
operation outside of design lim its, im proper repair, or unauthorized m odification. This WARRANTY is VOID if  
the unit shows evidence of having been tam pered with or shows evidence of being dam aged as a result  
of excessive corrosion; or current, heat, m oisture or vibration; im proper specification; m isapplication; m isuse  
or other operating conditions outside of OMEGAs control. Components which wear are not warranted, including  
but not lim ited to contact points, fuses, and triacs.  
OMEGA is p le a s e d t o o ffe r s u g g e s t io n s o n t h e u s e o f it s va rio u s p ro d u c t s . Ho w e ve r,  
OMEGA n e it h e r a s s u m e s re s p o n s ib ilit y fo r a n y o m is s io n s o r e rro rs n o r a s s u m e s  
lia b ilit y fo r a n y d a m a g e s t h a t re s u lt fro m t h e u s e o f it s p ro d u c t s in a c c o rd a n c e  
w it h in fo rm a t io n p ro vid e d b y OMEGA, e it h e r ve rb a l o r w rit t e n . OMEGA w a rra n t s  
o n ly t h a t t h e p a rt s m a n u fa c t u re d b y it w ill b e a s s p e c ifie d a n d fre e o f d e fe c t s .  
OMEGA MAKES NO OTHER WARRANTIES OR REP RES ENTATIONS OF ANY KIND  
WHATS O EVER, EX P RES S ED O R IM P LIED , EX C EP T THAT O F TITLE, A N D A LL  
IM P LIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND  
FITNES S FOR A PARTICULAR P URP OS E ARE HEREBY DIS CLAIMED. LIMITATION  
OF LIABILITY: Th e re m e d ie s o f p u rc h a s e r s e t fo rt h h e re in a re e xc lu s ive a n d t h e  
t o t a l lia b ilit y o f OMEGA w it h re s p e c t t o t h is o rd e r, w h e t h e r b a s e d o n c o n t ra c t ,  
w a rra n t y, n e g lig e n c e , in d e m n ific a t io n , s t ric t lia b ilit y o r o t h e rw is e , s h a ll n o t e xc e e d  
t h e p u rc h a s e p ric e o f t h e c o m p o n e n t u p o n w h ic h lia b ilit y is b a s e d . In n o e v e n t  
s h a ll O M EG A b e lia b le f o r c o n s e q u e n t ia l, in c id e n t a l o r s p e c ia l d a m a g e s .  
CONDITIONS: Equipm ent sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic  
Com ponent” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in m edical  
applications or used on hum ans. Should any Product(s) be used in or with any nuclear installation or activity,  
m edical application, used on hum ans, or m isused in any way, OMEGA assum es no responsibility as set forth  
in our basic WARRANTY / DISCLAIMER language, and additionally, purchaser will indem nify OMEGA and  
hold OMEGA harm less from any liability or d a m a g e w h a t s o e v e r a r is in g o u t o f t h e u s e o f t h e  
P r o d u c t (s ) in s u c h  
a
m a n n e r.  
RETURN REQUES TS / INQUIRIES  
Direct all warranty and repair requests/inquiries to the OMEGA Custom er Service Departm ent.  
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED  
RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID  
PROCESSING DELAYS). The assigned AR num ber should then be m arked on the outside of the return  
package and on any correspondence.  
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent  
breakage in transit.  
FOR WARRANTY RETURNS, please have the  
following inform ation available BEFORE contacting  
OMEGA:  
FOR NON-WARRANTY REPAIRS, consult  
OMEGA for current repair charges. Have the  
following inform ation available BEFORE  
contacting OMEGA:  
1. P.O. num ber under which the product was  
PURCHASED,  
1. P.O. num ber to cover the COST  
of the repair,  
2. Model and serial num ber of the product under  
warranty, and  
2. Model and serial num ber of product, and  
3. Repair instructions and/or specific  
problem s relative to the product.  
3. Repair instructions and/or specific problem s  
relative to the product.  
OMEGA’s policy is to m ake running changes, not m odel changes, whenever an im provem ent is possible.  
This affords our custom ers the latest in technology and engineering.  
OMEGA is a registered tradem ark of OMEGA ENGINEERING, INC.  
©
Copyright 1996 OMEGA ENGINEERING, INC. All rights reserved. This docum ent m ay not be copied,  
photocopied, reproduced, translated, or reduced to any electronic m edium or m achine-readable form , in  
w h o le o r in p a r t , w it h o u t p r io r w r it t e n c o n s e n t o f O M EG A EN G IN EERIN G , IN C.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
W h e re Do I Fin d Eve r y th in g I N e e d fo r  
Pro ce ss Me a su re m e n t a n d Co n tro l?  
O MEGA…O f Co u rse !  
TEMPERATURE  
ߜ
 Thermocouple, RTD & Thermistor Probes,  
Connectors, Panels & Assemblies  
ߜ
 Wire: Thermocouple, RTD & Thermistor  
ߜ
 Calibrators & Ice Point References  
ߜ
 Recorders, Controllers & Process Monitors  
ߜ
 Infrared Pyrometers  
PRESSURE, STRAIN AN D FO RCE  
ߜ
 Transducers & Strain Gauges  
ߜ
 Load Cells & Pressure Gauges  
ߜ
 Displacement Transducers  
ߜ
 Instrumentation & Accessories  
FLO W / LEVEL  
ߜ
 Rotameters, Gas Mass Flowmeters & Flow Computers  
ߜ
 Air Velocity Indicators  
ߜ
 Turbine/ Paddlewheel Systems  
ߜ
 Totalizers & Batch Controllers  
p H/ CO N DUCTIVITY  
ߜ
 pH Electrodes, Testers & Accessories  
ߜ
 Benchtop/ Laboratory Meters  
ߜ
 Controllers, Calibrators, Simulators & Pumps  
ߜ
 Industrial pH & Conductivity Equipment  
DATA ACQ UISITIO N  
ߜ
 Data Acquisition & Engineering Software  
ߜ
 Communications-Based Acquisition Systems  
ߜ
 Plug-in Cards for Apple, IBM & Compatibles  
ߜ
 Datalogging Systems  
ߜ
 Recorders, Printers & Plotters  
HEATERS  
ߜ
 Heating Cable  
ߜ
 Cartridge & Strip Heaters  
ߜ
 Immersion & Band Heaters  
ߜ
 Flexible Heaters  
ߜ
 Laboratory Heaters  
EN VIRO N MEN TAL  
MO N ITO RIN G AN D CO N TRO L  
ߜ
 Metering & Control Instrumentation  
ߜ
 Refractometers  
ߜ
 Pumps & Tubing  
ߜ
 Air, Soil & Water Monitors  
ߜ
 Industrial Water & Wastewater Treatment  
ߜ
 pH, Conductivity & Dissolved Oxygen Instruments  
M2614/ 0197  
Download from Www.Somanuals.com. All Manuals Search And Download.  

National Instruments Network Card NI PXI 7831R User Manual
NEC CRT Television PF32W503 User Manual
Nikon Camera Lens 2164 User Manual
NordicTrack Treadmill NTL11920 User Manual
Omnimount TV Video Accessories Prism 50 User Manual
OPTI UPS Power Supply LAN Box User Manual
Panasonic Switch EVQ11 User Manual
ParaBody Home Gym 893101 User Manual
Paradyne Network Card 3160 A3 User Manual
Parkside Paint Sprayer PFSP 100 User Manual