Siemens SIMATIC ET 200AL System Manual page 40

Connecting M12 connectors
To connect M12 connectors, proceed as follows:
1. Insert the plug into the respective round socket on the module.
Ensure the correct alignment between plug and socket (groove and spring).
2. Tighten the connector using the knurled screw with a torque of 1 Nm.
The figure below shows the connection of the M12 plugs, using the example of the IO-Link
digital input module DI 16x24VDC 8xM12..
Figure 5-7
Pin assignment of the sockets
The pin assignment of the sockets can be found in the equipment manuals of the I/O modules
(https://support.industry.siemens.com/cs/ww/en/ps/14247/man) in the section on pin
assignment and on the side surface of the module.
Y-cable
The Y-cable allows you to connect two actuators or sensors to the inputs or outputs.
The use of a Y-cable is recommended in particular if two channels are occupied per socket of
an I/O module. The Y-cable distributes the channels to two circular connectors.
IO-Link I/O modules
System Manual, 10/2020, A5E48755395-AA
Connecting M12 connectors
Connecting
5.5 Wiring
39