Siemens S7-1200 PROFIBUS - Pinout of the D-Sub Socket

Technical data
6.2 Pinout of the D-sub socket
SIMATIC CM 1242-5
42 Operating Instructions, 01/2023, C79000-G8976-C245-06
6.2 Pinout of the D-sub socket
PROFIBUS interface
Table 6- 2 Pinout of the D-sub socket
Pin
Description
Pin
Description
1
- not used -
6
VP: Power supply +5 V only for bus
terminating resistors;
not for supplying external devices
2
- not used -
7
- not used -
3
RxD/TxD-P: Data line B
8
RxD/TxD-N: Data line A
4
CNTR-P: RTS
9
- not used -
5
DGND: Ground for data signals
and VP
Housing
Ground connector
PROFIBUS cable and connector
NOTICE
Contacting the shield of the PROFIBUS cable
The shield of the PROFIBUS cable must be contacted.
To do this, strip the insulation from the end of the PROFIBUS cable and connect the shield to
functional earth.
Note
If you use a 180° PROFIBUS or a PG connector, the lower panel cannot be completely closed.