Siemens S5-135U/155U - Manual (Page 236)

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