Indoor beam break detector  A twin beam, infrared detector for indoor perimeter protection. The system has a range of 30 metres and triggers when both the infrared beams are simultaneously broken, reducing the likelihood of false alarms. Enclosed in white metal cases. Requires 12V power adaptor (not included).  Inside the Receiver 1 = - 2 = +12V 3 = Sync (only used if connecting more than 1 beam break sensor kit together) 4 & 5 = Tamper (only used if connected to alarm panels that support Tamper) 6 & 7 = Normally Open 7 & 8 = Normally Closed  Inside the transmitter 1 = - 2 = +12V 3 = RX Inhibit (Not normally used) 4 = Sync (only used if connecting more than 1 beam break sensor kit together)  Approved
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