"The PSEN cs2.2p safety switch is fully coded and the coding is unique which means it will only switch with the supplied actuator. If the actuator\/switch is lost or broken, you will need to buy a new set.Series connection - you can connect more than 10 safety switches in sequence to Cat 4 of EN954-1. Unique assignment of switch and its actuator. They are coded only to each other for their operational life. 5 directions of actuation. M12 connection, 8-pinSupply Voltage = 24 V dcHousing Material = PlasticSeries = PSENmagSwitching Distance = 15 mmIP Rating = IP67Actuator Included = YesActuator Type = Unique Coded, Uniquely CodedWidth = 40mmSensor Principle = MagneticDepth = 40mm"