Siemens SIMATIC ET 200AL System Manual page 181

Connecting
5.5 Wiring
Connecting M8 connectors
To connect M8 connectors, proceed as follows:
1. Insert the plug into the respective round socket on the module.
Ensure the correct alignment between plug and socket.
2. Tighten the connector using the knurled screw with a torque of 0.4 Nm.
The figure below shows the connection of the M8 plugs, using the example of the IO-Link
digital input module DI 8x24VDC 8xM8..
Figure 5-6
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
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Connecting M8 connectors
Connecting M12 connectors
IO-Link I/O modules
System Manual, 08/2021, A5E48755395-AB