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Video Door Phone User Manual
5
3.2 Wiring Description
Purpose:
A four-wire video intercom system is mainly composed of the indoor station and the door station.
You can connect the analog camera to the indoor station, and connect the electric bolt to the door
station.
Up to 2 door stations are supported simultaneously in the intercom system.
Up to 3 indoor stations are supported simultaneously in the intercom system.
Here take 3 wirings as example.
Note
● According to different transmission distances among door stations and indoor stations,
different RVV4 cable specifications are demanded.
Transmission Distance (TD)
RVV4 Cable Specification
TD ≤ 10 m
RVV4 * 0.2 mm ^2
10 m < TD ≤ 30 m
RVV4 * 0.5 mm ^2
30 m < TD ≤ 50 m
RVV4 * 0.75 mm ^2
50 m < TD ≤ 100 m
RVV4 * 1.5 mm ^2
● On the rear panel of the indoor station, four-wire interface A and four-wire interface C
compose a cascading group; and four-wire interface B and four-wire interface D compose a
cascading group.
● The communication between A and B/D cannot be realized.
● The communication between C and B/D cannot be realized.
Caution
Do not connect the power wire of the four-core cable to the V pin (video wire) or A pin (audio
wire) of the four-wire interface.
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