13.3 Power supply module PSM3.1
13.3.1 Power supply module PSM3.1
The power supply module provides power to all the hardware modules in the rack. The rack status and alarms activate the PSM's
three relay outputs. There are two ports for internal communication with I/O extension units.
PSM3.1 manages the hardware module self-checks for the rack and includes a power LED. The power supply terminals include
circuit protection against load dump transients and JEM177 surge transients (rugged design). These terminals also include battery
voltage measurement.
Table 13.6
PSM3.1 terminals
Module
Count Symbol Type
Name
1
2
3
4
5
6
7
8
F/G
PSM3.1
M
ul
ti
‐
lin
e
30
0
+
‐
1
Ground
Frame ground
1
+
-
12 or 24 V
Power supply
3
Relay output
1 × Status OK (fixed), and 2 × configurable
2
Internal communication
(RJ45)
DEIF internal communication connections (to connect to
extension unit)
(The LEDs are on the front of the hardware module. The
connections are at the bottom of the hardware module.)
Table 13.7
PSM3.1 technical specifications
Category
Specification
Frame ground
Voltage withstand: ±36 V DC to the power supply positive (terminal 1)
Voltage withstand: ±36 V DC to the power supply negative (terminal 2)
Controller power supply
+
-
Input voltage: 12 or 24 V DC nominal (8 to 36 V DC continuously)
UL/cUL Listed: 10 to 32.5 V DC
0 V DC for 50 ms when coming from at least 8 V DC (cranking dropout)
Consumption: Typical 20 W, maximum 35 W
Voltage measurement accuracy: 0 to 30 V: ±1 V; 30 to 36 V: +1/-2 V
The power supply inputs are internally protected by a 12 A fuse (not replaceable) (fuse size
determined by load dump requirements).
Voltage withstand: ±36 V DC
Load dump protected by TVS diodes.
Start current
DESIGNER'S HANDBOOK 4189340911K UK
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