Manual Door intercom devices a / b series 20 / 30 / 40 / 50 / 20-0028A/-0028B
Connection
GB
63www.behnke-online.com
Grounding
Telephone line
Analogue landline connection or analogue
telephone extension
Wire a
Wire b
6 - 24 V =
Alarm input
Not used in this device
–
+
Relay 1
Relay switch power: max. 60 VA/24 W:
0,5 A 120 V~ or 1A 24V=
Relay 2
Relay switch power: max. 60 VA
24 W 0.5 A 120 V~ or 1A 24V=
Operating contact
Control contact
Rest contact
Operating contact
Control contact
Rest contact
Pushbutton 1 + 2 (potential-free closing
contact)
Microphone (please maintain the polarity!)
Speakers
Number keypad
Connection for additional boards
EEprom
Master CPU
Internal configuration keyboard
MLM A (Main MLM) – Microphone /
Speaker module (configuration
step 22 / button 2)
12 V - 15 V=
Additional power supply
potential-free voltage e.g. from
a Behnke power supply unit
–
+
Universal electronics 20-0006/-0018/-0026 (from first quarter of 2019 onwards)
MLM B (Additional MLM) – Microphone /
Speaker module (configuration
step 23 / button 3)
MLM C (Additional MLM) – Microphone /
Speaker module (configuration
step 24 / button 4)
Please note: When connecting multiple MLMs, the maximum distance between MLM and basic electronics is decreased:
1 MLM = 25 m / 2 MLMs = 12.5 m each / 3 MLMs = 8.5 m each
Suitable installation material for adaptation of speaker, microphone and buttons at the door: Branch-off box 20-9208
alternatively patch cable 20-9309
Telephone number configuration
Yellow: Configuration step 22
Blue: Configuration step 23
Red: Configuration step 24
Please note: Please compare your connection boards of the delivered device/rep. kit to the con-
nection boards in the picture. You can find further configuration steps from page 72 onwards.
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