20
Adjust the layout to reduce happening of the squeaking.
Please refer to Figure 3-10. It is for audio and video output.
Figure 3-10
Audio/video output cable is shown as below. See Figure 3-11. You can use it when your monitor
port is general BNC port.
Figure 3-11
Please refer to the following sheet for detailed information.
Audio/Video Output Cable (Aviation-level port 4p male socket )
Socket
Color and Definition
1
Yellow BNC male port
（
Video input
）
2
White BNC male port
（
Audio input
）
3.7 Alarm Input and Output Connection
There are two alarm input types for you to select: normal open (NO) and normal close (NC).
1. Alarm input
a. Alarm input supports 6V-36V voltage signal alarm input.
b. When the alarm device is connecting one DVR and one other device, please use a relay to
separate them,
2. Alarm output
The alarm output port should not be connected to high power load directly (It shall be less than
1A) to avoid high current which may result in relay damage. Please use the co contactor to
realize the connection between the alarm output port and the load.
3. How to connect PTZ decoder
a. Ensure the decoder has the same grounding with DVR, otherwise you may not control the PTZ.
Shielded twisted wire is recommended and the shielded layer is used to connect to the grounding.
b. Avoid high voltage. Ensure proper wiring and some thunder protection measures.
