HIKVISION DS-7204HUHI-K1 Manuel de l'utilisateur - Page 6
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White Paper of Power over Coaxial (PoC)
Chapter 2
PoC and Analog Surveillance
Wiring
PoC is a coaxial cable-based transmission technology of video, coaxitron and power supply. A PoC
DVR has a built-in PoC power module and operates by power supply of 48 VDC and 52 VDC with
DC current-based video signals. The technical barrier of PoC module is how to overlap DC current
and video signals without causing interference to video signals. The patented technology of
Hikvision effectively separates AC and DC current so that electricity and video signals are
transmitted harmoniously together on coaxial cables.
With the PoC technology, the wiring of analog surveillance becomes much easier and more
efficient while the cost is lower.
Below is a comparison of different wiring methods:
Traditional wiring: Both separate and centralized power supply require power and coaxial cable
connection to the cameras.
Figure 2-1
Traditional Wiring
PoC 1.0 wiring: The PoC unit is powered through power cables and is connected to cameras
through coaxial cables that transmit power and video signals. Then the video signals are
transmitted from the PoC unit to DVR through coaxial cables.
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