Siemens S5-155U System Manual page 506

System Manual
C79000-T8576-C199-03
Assignments of the front connector for the coordinators
Pin No. Designation
1 Housing/0 V/0 V
2 Receiver TTY(-)
3 Private line
4 +24 V
5 Private line
6 Transmitter TTY (+)
7 Transmitter TTY (-)
8 Housing/0 V/0 V
9 Receiver TTY (+)
10 24 V ground (20 mA (-) current sources)
11 20 mA (+) current source
12 Private line
13 20 mA (+) current source
14 Private line
15 Private line
Connector Assignments
ext
ext
10
10 - 19