Distributor installation, power supply unit, 2-wire for audio-video door intercom system with integrated video adapter, for top-hat rail mounting. Can be used for audio and video systems from the bticino brand. Contains 3 BUS connections for input video door station, input audio door station and riser cablethe house stations as well as 1 connection (1 - 2) for additional voltage supply built-in PTC protection input: 230 V AC 50 Hz | terminals BUS TK, BUS PI, SCS, 1-2 | output for BUS line 27 V DC 1,2A.