HIKVISION DS-7208HQHI-K2 Benutzerhandbuch - Seite 9
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When powered by PoC and connected to 12 VDC, if PoC is disconnected, the camera will turn
to 12 VDC power supply and will not restart.
3.3 Dual-power Supply
For a PoC camera, dual-power supply (self-supplied power and PoC DVR power) ensures that the
camera can be accessed during power exceptions. When the self-supplied 12 VDC power failed,
the camera will switch to PoC power supply (video signal may stop for a period of time); when PoC
power supply failed, the camera will switch to 12 VDC power.
3.4 AT/AF Mode
With reference to PoE standards, Hikvision has introduced AT and AF mode for PoC to distinguish
the power level of PoC cameras: the max. operating power of AT and AF are 10 W and 6 W
respectively. These two modes are not related to IEEE 802.3 IP standard.
3.5 PoC Access Capability
PoC Device
4-ch PoC device
8-ch PoC device
16-ch PoC device
16-ch PoC device is connected to 8 AT cameras through 8 random channels rather than fixed ones.
The access scenarios of a 16-ch PoC device are listed in the table below:
AT camera access
AF camera access
3.6 Insufficient PoC Power
If the power of a DVR channel is not enough to support a PoC camera, the prompt of "Insufficient
Power For PoC" will be displayed in the live view window.
White Paper of Power over Coaxial (PoC)
Allowed AT/AF Camera Access
4 AT cameras
8 AT cameras
8 AT cameras + 8 AF cameras
Or up to 12 AT cameras
12
11
0
2
8
10
9
8
4
6
8
N (0 to 7)
16-N