GB
Manual Door intercom devices a / b series 20 / 30 / 40 / 50 / 20-0028A/-0028B
Technical Specifications
GB
90
www.behnke-online.com
9.
technical specifications
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)
