Introduction
AHD Hybrid DVR User Manual
5
Audio Connections
Audio Input: Connect to microphone, pickup, etc.
Audio Output: Connect to headphone, sound box or other audio output devices.
Alarm Connections
Some models may support this function. Take 16 CH alarm inputs and 1 CH alarm output for
example.
Alarm Input:
Alarm IN 1~16 are 16 CH alarm input interfaces. There are no type requirements for sensors.
NO type and NC type are both available.
The way to connect sensor and the device is as shown below:
The alarm input is an open/closed relay. If the input is not an open/closed relay, please refer to
the following connection diagram:
Alarm Output:
The way to connect alarm output device:
Pull out the green terminal blocks and loosen the screws in the alarm out port. Then insert the
signal wires of the alarm output devices into the port of NO and COM separately. Finally,
