The DUOX Relay allows a potential-free relay to be available in DUOX installations, with several configurable modes of operation and activation: (1) Activation of the relay by means of commands generated from the house terminals, boards or guard units. (2) External activation by push buttons, additional external switches, etc ... The DUOX Relay can be installed anywhere on the duox bus. It is possible to install one or more relays: per apartment, block or installation. Input voltage: 18 VDC.