RHINO MNVR Series, Руководство пользователя

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20
SN Function
1
12V external power supplying.
Less than 1.5A.
2 GND
3 Audio port
4 Video port
2.7 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 grounding alarm input.
b. Alarm input supports 12V voltage signal alarm input.
c. When the alarm device is connecting one NVR and one other device, please use a relay to
separate them,
2. Alarm output
The alarm output max load shall be less than 0.5A. It should not be connected to high power load
directly 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
 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.
 Avoid high voltage. Ensure proper wiring and some thunder protection measures.
 For too long signal wires, 120Ω should be parallel connected between A, B lines on the far
end to reduce reflection and guarantee the signal quality.
 Device A/B cable cannot parallel connect with the 485 port of other device.

The voltage between of A,B lines of the decoder should be less than 5v.
4. Please make sure the front-end device has soundly earthed.
Improper grounding may result in chip damage.
5. Alarm input type
NO (Normal open)/NC (Normal close).
2.7.1 Alarm Input and Output Details
Alarm input and output interface is shown as in Figure 2-23.