Siemens S5-135U/155U - Manual (Page 250)

5-110
System Manual
C79000-G8576-C199-06
Connecting Cable: CPU - IM 512
To generate loop current, the IM 512 must be supplied with 24 V at the
subminiature D-type connector in the front plate.
Shield
CPU
Transmitter
13
Receiver
14
Transmitter
+ 24 V
+ 24 V
IM 512
12
13
23
11
24
25
Device ID
1
Receiver
19
10
Housing, GND Housing
0
14
5
2
17
6
18
15
3
2
2
+ RxD
– RxD
+ TxD
– TxD
+ 20mA
– 20mA
– RxD
+ 20mA
+ TxD
– TxD
– 20mA
+ RxD
2
Figure 5-23 TTY Submodule: Connecting Cable CPU - IM 512
CPUs, Memory Cards, Memory Submodules, Interface Submodules