The ATH-OD8 is a module that ahs been designed to be installed on a DIN rail inside the electrical or domotics switch box, consisting of eight digital inputs, maximum 48 V and 1 A, for interconnecting systems or attacking high-powered circuits via contacts. The relays are usually in open mode, with the output status memorised in case of a power failure. Equipped with its own power source. The dimensions of this device are for six items, per DIN rail regulations.