Siemens S5-135U/155U System Manual page 236

CPUs, Memory Cards, Memory Submodules, Interface Submodules
Pin Assignments
Given in the following table are the pin assignments of the 15-pin
of the PG
subminiature D-type connector in the front plate of the PG submodule:
Submodule
Pin
8
15 15
9 9
1
: From partner to CPU
: From CPU to partner
5-96
Designation
1 Housing/GND/GND
ext
2 – RxD
3 VPG + 5 V_
4 + 24 V from bus
5 0 V GND/GND
int
6 + TxD
7 – TxD
8 Housing/GND/GND
ext
9 + RxD
10 24 V GND
11 20 mA
12 GND/GND
int
13 20 mA
14 VPG + 5 V_
15 0 V GND/GND
int
Current Remarks
Direction
Current return
Current source, transmitter
Current source, receiver
System Manual
C79000-G8576-C199-06