| Bell button extension Built in bell button extension for up to 32 flats 32 further bell buttons can be added with the bell button extension TCKE. The TCU door loud speaker can be connected with it. : for up to 32 flats : Interconnection of up to 4 TCKE extensions to TCU possible : Installation behind the front panel : each bell button can be assigned to 1 ln-house station : acknowledgement tone when bell button Is pressed : bell button can be used for light switch on : plug-In memory to exchange Identical front-door stations : 2-wlre technique : Input current: I (a) = 1.0 mA standby : operating temperature range: -20°C to 50°C : dimensions: H 80 mm x W 104 mm x D 25 mm |