"The Ferrogard FRS 1, 2, 20 and 21 are magnetically actuated non-contact safety switches which offer reliability and a high tolerance to misalignment. Designed to be installed on a guard door, the action of the magnetic actuator being removed from the switch opens the N.C. safety contacts therefore isolating the control power to the machines primary control element. Made from moulded ABS with a rectangular housing and sealed to IP67 (NEMA 6P), these non-contact switches are ideal for wet environments.Non-contact actuation. High tolerance to misalignment. Plastic rectangular housing. Cable or quick-disconnect (QD) connections. M4 mountable in any position. Operating distance for safety contacts - make,12mm, break,23mm. Operating temperature range: -10°C to +65°C. Sealed to IP67. Cat. 1 device per EN 954-1 dual channel interlocks suitable for Cat. 3 or 4 systemsSupply Voltage = 250 V acSafety Contacts = NCHousing Material = PlasticAuxiliary Contacts = NOConnection Type = 4-Pin Micro QDRange = FerrogardSeries = 440NIP Rating = IP67Actuator Included = YesDepth = 15mm"