User manual

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8
1、Do not stay in the turn-on state for a long time.
2、Keep the computer display normal working by demagnetizing regularly.
3、Stay away from the electro magnetic Interference.
TV is not a credible replacement as a video output. It demands reducing the use time and control the
power supply and the interference introduced by the nearby equipments strictly. The creepage of low
quality TV can lead to the damage of other equipments.
2.3.3 Audio signal input
Connect the pickup with audio input interface on IP camera.Then add the ip camera on nvr.
2.3.4 Audio signal output
Commonly the output parameter of NVR audio signal is greater than 200mv 1KΩ(BNC) which can
connect the low impedance earphone and active sound box or other audio output equipments
through power amplifier.
2.4 Alarm input and output connections
１、Alarm input
A. Alarm input is grounding alarm input.
B. Alarm input demand is the grounding voltage signal.
C. When the alarm is connected with two NVRs or connected with NVR and other equipments, it
should be isolated by relay.
２、Alarm output
Alarm output can not be connected with high-power load(no more than 1A).When forming the output
loop it must prevent the big current from relay damage. Use the contact isolator when there is a
high-power load
３、PTZ decoder connections
A. The grounding of the PTZ decoder and NVR must be shared otherwise the common-mode
voltage will lead to the PTZ control failure. The shielded twisted pair is recommended.
B. Avoid the entrance of high voltage. Make the layout reasonably. Take precaution from the
thunder.