How to wire 5-wire intercom doorbell

The connection mode of five-core intercom doorbell is as follows:

The five-core wires from the host are red (+V)+ 12V, white (TXD) data transmission, black (RXD) data reception, green (GND) ground wire and blue (ALM) network signals, and the cables to the extension are black, red, yellow, green and white (+12.

Extended data:

Generally, the five lines are: audio line, video line, unlock line, positive power supply and negative power supply. Lines with the same function on the host can be connected to the corresponding extension lines respectively. If you don't know the function of each line, you can judge the function of each line by the following methods:

1. Under normal circumstances, the audio cable is also used as a call input line. Use a multimeter to measure the voltage from 5V to 12V to the ground wire, or short each line with wires. If the host has a bell, it means that these two lines are negative power supply and audio line.

2. After the call is triggered in the first step, the lead of 12V voltage output is the positive pole of power supply (generally, the host only provides the extension power supply when there is a call).

3. Connect the positive and negative poles of the power supply and the audio cable measured in the last two steps, and press the unlock key (with a lock pattern on it) on the host. At this time, the line with voltage output is the unlock output line.

References:

Baidu encyclopedia-wireless visual doorbell