Siemens SIMATIC NET PROFIBUS Manual Do Utilizador
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