Audio Intercom for 4 Apartments

Multi-User Audio Door Phone (4A ~ 8A)

1. Terminals 1,2,3,4 of the outdoor station (main unit) are connected to terminals 1,2,3,4 of the indoor station separately. The positive pole (+) is connected to the positive pole (+) of the power supply, and the negative pole (-) is connected to the negative pole (-) of the power supply.
Terminal 1 is connected to the open power supply.

2. The lock power supply is connected to the electric control lock. The red wire to the positive pole (+) and the black to the negative pole (-).

3. Terminal 5 of the indoor station is connected to the corresponding number of outdoor stations.
For example, terminal 5 of indoor station 1 is connected to terminal L1 of the outdoor station.

4. The volume of the indoor and outdoor unit can be adjusted by the knob on the back of the outdoor unit. Outdoor volume.
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