Siemens SIMATIC Panel PC 870 Equipment Manual page 110

Hardware Information
Pin assignment of the ATX power supply connector, X50
Pin No. Short Name
1
3.3V
2
3 GND
4 5V
5 GND
6 5V
7 GND
8 PowerGood
9 AUX-5V
10 12V
11 3.3V
12 –12V
13 GND
14 PSOFF
15
16
GND
17
18 –5V
19
5V
20
7-20
Meaning
3.3 V power supply
Ground
5 V power supply
Ground
5 V power supply
Ground
5 V auxiliary voltage
12 V power supply
3,3 V power supply
-12 V power supply
Ground
Ground
-5 V power supply
5 V power supply
Panel PC 870 Computing Unit Equipment Manual
Input / Output
Input
-
Input
-
Input
-
Input
-
Output
-
Input
Edition 12/01