The 4 IO-LINK HF electronic module is used together with the CM IO-LINK 4 X M12 P connection module. Sensors and actuators are integrated using commercially available 3 or 5-pin M12 connectors on the CM IO-LINK 4 X M12 P.

IO-Link devices (e.g. sensors) with a Class A port are connected using a 3-wire cable. IO-Link devices that require additional supply voltage and have a Class B port (e.g. actuators) are connected using a 5-wire cable.