Siemens S7-300 - Connector for PROFIBUS

Connector pinout
A.4 Connector for PROFIBUS
Configuring and commissioning S7 CPs for Industrial Ethernet
Configuration Manual, 09/2013, C79000-G8976-C182-13
225
A.4
Connector for PROFIBUS
9-pin D-sub female connector for PROFIBUS (used with IE/PB Link)
Pin no.
Signal name
PROFIBUS name
Used with RS-485
1
PI
Protective earth
yes
2
-
-
-
3
RxD/TxD-P
Data line B
yes
4
RTS (AG)
Control A
-
5 M5V2 Data reference
potential
yes
6
P5V2
Supply plus
yes
7
BATT
-
-
8
RxD/TxD-N
Data line A
yes
9
-
-
-