Electrical Connections - Siemens SIMATIC NET S7-1200 Operating Instructions Manual

2.3

Electrical connections

Power supply
The 3-pin socket for the external 24 V DC power supply is located on the top of the module.
The matching plug ships with the product.
You will find the pin assignment of the socket in section Pin assignment of the socket for the
external power supply (Page 42).
Figure 2-2
9-pin D-sub female connector (PROFIBUS)
The PROFIBUS connector is located behind the lower cover of the module. The interface is a
9-pin D-sub female connector operating according to the RS-485 standard.
You also have the option of connecting to optical PROFIBUS networks via an Optical Bus
Terminal OBT or an Optical Link Module OLM.
You will find the pin assignment of the D-sub socket in section Pinout of the D-sub socket
(Page 43).
More detailed information on the electrical connections
For technical information on the electrical connections, refer to the section Technical
specifications (Page 41).
SIMATIC CM 1243-5
Operating Instructions, 01/2023, C79000-G8976-C246-06
Socket for the 24 V DC power supply
LEDs and connectors
2.3 Electrical connections
21