... relay ,can provide NPN,PNPoutput,can come true single face and long distance region protection,or fit reflector ... protected zone.(2)Light curtain form:Plane mirror reflect(3)Standard configuration:2 sides protection:Emitter ... /1,Mirror/1,Receiver/1,W type controller/1, ... fittings/1 set;3 sides protection:Emitter/1,Mirror/2,Receiver/1,W type controller/1,Signal ...