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Siemens S5-135U/155U User Manual

Page 236

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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