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Siemens SIMATIC NET PROFIBUS User Manual

Page 148

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Passive Components for RS-485 Networks

4-50

PROFIBUS Networks SIMATIC NET

6GK1970-5CA20-0AA1 Release 2 05/2000

Table 4-10 Pinout of the Sub D Connector

Pin

Signal

Meaning

1

PE

Protective earth

2

NC

Not used

3

B (RXD/TXD-P)

Data line B (receive/transmit data P)

4

NC

Not used

5

M5V2 (DGND)

Data ground

6

P5V2 (VP)

+ 5V voltage plus

7

NC

Not used

8

A (RXD/TXD-N)

Data line A (receive/transmit data N)

9

NC

Not used