Siemens S5-155U System Manual page 497

Connector Assignments
Connector X1
Connector X2
10 - 10
Connector assignments of the power supply units
The terminals for the supply lines between the power supply unit and
the backplane are in an 8-way connector (Connector X1) at the rear of
the unit.
The following figures show the connector assignments.
5V/18A power supply units
Pins 4 to 6 are not fitted.
M2 (0V)
1 2 3 4
5V/40A power supply units
M2 (0V)
1 2 3 4
The signal terminals of the power supply unit are in a 37-way
connector (Connector X2) at the rear of the unit.
The following figure shows the connector assignments. Pins 8 and 9
are reserved.
GEP
RESET A DSI
reserved
NAU
1 2 3 4 5 6 7 8
BASPA BAU
RESET U-BATT
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
5V/18A
5 6 7 8
5V/40A
5 6 7 8
9 10 11 12 13 14 15 16 17 18 19
M2 (0V)
+15V
System Manual
C79000-T8576-C199-03
24V