Siemens S5-135U/155U - Manual (Page 259)

5-119
System Manual
C79000-G8576-C199-06
Shown in the following figure are the pin assignments of the 15-pin
subminiature D-type connector in the front plate of the SINEC L1
submodule:
Pin Designation Current
Direction Remarks
1 Housing/GND/GND
ext
2 – RxD
³
8
15
3 VPG + 5 V_
8
15
4 + 24 V from bus
5 24 V ground
6 + TxD
²
7 – TxD
³
8 Housing/GND/GND
ext
9
1
9 + RxD
²
1
10 24 V ground
²
Current return
11 20 mA
³
Current source, transmitter
12 24 V ground
13 20 mA
³
Current source, receiver
14 VPG + 5 V_
15 24 V ground
²
: from partner to CPU
³: from CPU to partner
Pin Assignments
of the SINEC L1
Submodules
CPUs, Memory Cards, Memory Submodules, Interface Submodules