FERMAX-3390 - VDS Basic Loft White Telephone

The Fermax 3390 is a wall-mounted audio handset telephone for VDS digital door entry systems. Part of the LOFT range, it provides reliable two-way audio communication with outdoor panels and electric lock release via a single combined button that also functions as a guard unit call when the handset is on the hook. Manufactured from impact-resistant white ABS plastic with UV protection, the handset features an internal magnet to secure it to the base unit when not in use. The VDS 3-wire bus system eliminates the need for individual call wires per dwelling, simplifying installation considerably. Key Features VDS digital bus system compatible (3-wire) Combined door release and guard unit call button Internal magnet for secure handset positioning Two selectable electronic call tones Three-position volume switch (Off / Low / Full) LED status indicator Apartment door call pushbutton input (P1) Extension call connection for call prolongator (ref. 2040) Conversation privacy as standard Maximum conversation time: 90 seconds Maximum ring time: 30 seconds Technical Specifications Power supply: 16-20 Vdc (18 Vdc nominal) Current draw standby: 6 mA Current draw call: 215 mA Current draw audio active: 11 mA Speaker: 1.75 inch, 16 Ohm Microphone: Electret, 50 Ohm dynamic resistance Operating temperature: -10 to +60 degrees C Mounting type: Wall mount, screw-on surface assembly F1/F2 max current: 50 mA at 12 Vdc Wiring: +, - (18 Vdc power), L (data and audio), T/- (apartment door call P1), A/+ (extension call)