Mounted in a standard white plastic single gang enclosure complete with front and back acting tamper switch. A unique labelling system allows for the onsite labelling of the enclosure. Universal timer module with two timing ranges 1 - 60 sec's & 1 - 60 mins. Volt free DPCO relay contacts are rated at 2A/30vdc resistive. Multiple trip modes. A-stable operation for pulsing sounders etc. This versatile unit can also be used as a commutating relay i.e. one pulse energises the relay and a further pulse de-energises the relay.