Telecom Behnke 20 Series - Technical Specifications

GB
Manual Door intercom devices a / b series 20 / 30 / 40 / 50 / 20-0028A/-0028B
Technical Specifications
GB
90 www.behnke-online.com
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Connection type: analogue telephone line, a / b port
Power supply: via the a / b port
Coil tension: 20-70 VDC
Coil current: 20-60 mA
Additional power supply: 12-15 V= potential-free
Behnke power supply unit or any other additional power supply
in connection with a Behnke DC-DC converter; one Behnke door
intercom device per power supply unit
Terminal: ZR according to TBR 21
Recognised caller signal: cannot be specified exactly, as it depends on the signal’s
amplitude, frequency and interval
Recognised busy signal: 400-450 Hz sinus
Recognised busy signal interval: Signal tones for 160-700 ms or pauses for 160-700 ms respectively
Permitted cable length: max. 10 m each (for MLM A, +MLM B, +MLM C, LS, MIC, T1,andT2)
or max. 25 m each (for LS, MIC, T1,andT2, if no other MLM is con-
nected)
Dialling methods: DTMF dialling, 50/50 ms (tone/pause)
Built-in relays: 2 pcs. (2 switch relays)
Relay switch power: max. 60 VA/24 W: 0,5A, 120V~ or 1A, 24V =(resistive load)
Additional power supplies
on MLMs: max. current draw 30 mA per MLM
Memory: EEprom, non-volatile
IP protection class: 54
Operating temperature: -20 °C to +50 °C
Tested according to: TBR 21 as well as EC 201 121 (EU-wide network access) EN 55022,
EN55024 (Electromagnetic
Compatibility)
EN60950 (Product Safety)