Siemens S5-135U/155U System Manual page 522

Connector Assignments
Connector assignments of the 6ES5 955-3NA12 power supply unit
Connector X1
The terminals of the supply lines between the power supply unit and the
backplane are in an 8-way connector (subminiature, fitted with 8 high-current
contacts, Series D to MIL-C24308).
Connector X2
The signal terminals of the power supply unit are in a 37-way connector
(plug connector, 37-way, Series D to MIL-C24308).
11-10
M2 (0V)
1 2 3 4 5 6
RESET A
DSI
GEP
RESET
NAU HOLD
DS
1 2 3 4 5 6 7 8
BASP IR
BASP A U BATT
CPKL BAU RLSA
RESIN
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
5V/10A
7 8
9 10 11 12 13 14 15 16 17 18 19
24V/0.8A
+15 V
M2 (0V) –15V
unas-
signed
C79000-G8576-C199-06
System Manual