JOBAID
TOTAL ACCESS 4303 PLUS DC POWER SUPPLY
61202335L1-22A
0401
FRONT PANEL LEDs
ALARM RELAYS
DC SUPPLY
There are eight alarm relays that provide normally open or normally closed
contacts for each of the following alarms:
POWER G Off
Both –48 VDC fuses blown, power not supplied to the shelf,
or incorrect polarity on the voltage supplied to the shelf
CLEI: SLPOCDBC_ _
G Green
G Amber
G Red
Power supplied is the correct voltage and polarity; backplane
and hot insertion voltages correct
–48 VDC input and hot insertion voltage present; no back-
plane voltage
–48 VDC input present; no backplane voltage and no hot
insertion voltage
I Visual Critical
I Visual Major
I Visual Minor
I Audible Critical
I Audible Major
I Audible Minor
I Auxiliary 1
TEMP
G Off
G Red
Normal
Over-temperature condition
I Auxiliary 2
DESCRIPTION
®
POWER SUPPLY 48 PIN CONNECTOR PINOUT
The Total Access 4303 Plus DC Power Supply is a removable assembly that provides
the voltages necessary for proper system operation. The unit features LEDs for over-
temperature and DC output, an input fuse, and the ability to be hot-swapped when
used with another DC supply in the same chassis. The supply interfaces to the Total
Access backplane through a 48-pin connector. The unit accepts one or two –48 VDC
inputs from the backplane and supplies –48 VDC fused output for use with external
input logic, +5 VDC as hot insertion bias voltage for modules, and +2.1 VDC for back-
plane termination. In addition, the Total Access 4303 Plus DC Supply provides alarm
relay ouputs when installed in slot PS-A.
Pin #
1
2
3
4
5
6
7
8
Row A Signal
AUD_CRIT_NO
AUD_MAJ_NO
AUD_MIN_NO
VIS_CRIT_NO
VIS_MAJ_NO
VIS_MIN_NO
AUX1_RLY_NO
AUX2_RLY_NO
–48V_A
Row B Signal
AUD_CRIT_COM
AUD_MAJ_COM
AUD_MIN_COM
VIS_CRIT_COM
VIS_MAJ_COM
VIS_MIN_COM
AUX1_RLY_COM
AUX2_RLY_COM
PS_OK
Row C Signal
AUD_CRIT_NC
AUD_MAJ_NC
AUD_MIN_NC
VIS_CRIT_NC
VIS_MAJ_NC
VIS_MIN_NC
AUX1_RLY_NC
AUX2_RLY_NC
PS_TEMP
The following features are supported on the Total Access 4303 Plus DC Power Supply:
9
I Thermal limit indicator with open collector output
10
11
12
13
14
15
16
–48V_B
2.1V
–48V_AB_RTN
GND
GND
2.1V
2.1V
2.1V
GND
GND
PSRLY_LOAD
–48V
PS_PRESENT
2.1V
VCC
I DC status indicator on the 2.1 and 5 volt outputs with open collector output
I Short circuit protection
GND
I Compatible with existing Total Access DC Power Supplies (P/N 1200335L1)
PSRLY_CLK
PSRLY_DATAIN
PSRLY_DATAOUT
GND
FR_GND
SPECIFICATIONS
Specifications
Input Voltage
Operating Temperature
Storage Temperature
–42 VDC to –56 VDC
–40°C to +65°C
–40°C to +85°C
Relative Humidity
Up to 95% noncondensing
90°C 5%
Fused 1-amp slow blow
Self-mending
FCC Part 15, UL 60950, NEBS Level III,
GR-1089-CORE
Over Temperature Indication
–48 VDC Short Circuit Protection
Backplane Voltage Short Circuit Protection
Compliance
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
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