Suited to connecting sensors to PLC inputs. Sensor connections on same interface relay input with simple cable assignment. Bridgeable for multiple sensors/NOCs for sensors with 2 connections or when controlling via NOC BB = + (plus), A1 = single sensor/NOC output. Bridgeable for multiple sensors for sensors with 3 connections, A2 = – (minus) bridgeable for multiple sensors, A1 = single sensor output. Terminals A2, BB & 13+ are bridgeable.