... (3)Standard configuration:Emitter/1,Receiver/1,N type controller/1,Signal cable 3m/1 root, 5m/1 root ,Installation fittings/1 set;It is allowed ... to choose W type controller,at ... signal cables are 2.5m/1 root,4.5m/1 root,(4)Controller:N type, inside installation,control 1 set light curtain,the powersource ...