With inductive couplers, energy and data are transmitted contactlessly via an air gap. This makes mechanical plug contacts superfluous. If our bidirectional coupling system with IO-Link is used, the data can also be transmitted in both directions. Function=IO-Link, signal form=bidirectional, transmission distance=0...5 mm, component=base, connection=plug connector, M12x1 connector, 4-pin, rated operating voltage Ue=24 VDC, housing material=PBT, dimensions=40 x 40 x 63 mm, ambient temperature=-5...55 °C, protection class=IP67, transmission rate=COM2 (38.4 kBaud), process data IN=0.32 bytes, process data OUT=0.32 bytes, SIO mode=no