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11 FAQ
PoC Power Supply 11.1
PoC XVR supports PoC function.
PoC camera can be divided into AT camera and AF camera. Power consumption of AT camera is less
than 12W, and power consumption of AF camera is less than 6W.
You need to check the maximum power of PoC before use. Assuming that the maximum power of
one XVR is 48W, the XVR can connect AT cameras up to 48/12=4 and AF cameras up to 48/6=8.
When the device is in the condition of PoC power supply, do not connect any other device between
the device and PoC XVR or PoC transceiver such as UTC, Balun, optical transceiver, distributor and
convertor and so on; otherwise, the device might get burned.
PoC power supply is with high voltage. Do not dismantle the device during normal operation;
otherwise it might cause danger to both device and users due to high voltage.
Long Distance Power Supply 11.2
In many scenarios, our clients adopt long distance power supply, transmitting 12V DC to cameras
located over 100 m. Such long distance power supply might cause problems.
Q1: Recurrent restart of devices or even ICR Failure.
Possible reasons: The long power supply cable leads to a large voltage drop on the equipment power
supply cable, and turning on the IR light at night leads to a further increase of the voltage drop,
resulting in restart of the device. After the device is restarted, the ICR is switched to the Day mode by
default. By judging the ambient light at night, the device will operate in Night mode, and then the
infrared light is turned on, which causes the device to restart again because of undervoltage. Thus,
ICR is switched to every 2 seconds, impacting its switching lifespan.
Q2: Unable to restart devices at night, and black screen or restart occurs when switching ICR.
Possible reasons: The long power supply cable leads to a large voltage drop on the equipment power
supply cable, and turning on the IR light at night leads to a further increase of the voltage drop,
resulting in restart of the device and black screen.
Solution: During construction, when the camera location is far from the power supply, you need to
adopt long distance separate power supply or purchase –DP dual power supply to use 24V AC power
supply.
Centralized Power Supply 11.3
The typical problem of centralized power supply is that there are obvious black stripes on the device
screen, which interferes with the display.
The principle of centralized power supply is as follows:
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