HIK VISION DS-7204HQHI-K1 User manual

User Manual of Storage Prod and Solution
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PoC (Power over Coaxial)
White Paper

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User Manual
COPYRIGHT © 2018 Hangzhou Hikvision Digital Technology Co., Ltd.
ALL RIGHTS RESERVED.
Any and all information, including, among others, wordings, pictures, graphs are the properties of
Hangzhou Hikvision Digital Technology Co., Ltd. or its subsidiaries (hereinafter referred to be
“Hikvision”). This user manual (hereinafter referred to be “the Manual”) cannot be reproduced,
changed, translated, or distributed, partially or wholly, by any means, without the prior written
permission of Hikvision. Unless otherwise stipulated, Hikvision does not make any warranties,
guarantees or representations, express or implied, regarding to the Manual.
About this Manual
This Manual is applicable to PoC products.
The Manual includes instructions for using and managing the product. Pictures, charts, images and
all other information hereinafter are for description and explanation only. The information
contained in the Manual is subject to change, without notice, due to firmware updates or other
reasons. Please find the latest version in the company website (http://overseas.hikvision.com/en/).
Please use this user manual under the guidance of professionals.
Trademarks Acknowledgement
and other Hikvision’s trademarks and logos are the properties of Hikvision in various
jurisdictions. Other trademarks and logos mentioned below are the properties of their respective
owners.
Legal Disclaimer
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE PRODUCT DESCRIBED, WITH ITS
HARDWARE, SOFTWARE AND FIRMWARE, IS PROVIDED “AS IS”, WITH ALL FAULTS AND ERRORS,
AND HIKVISION MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT
LIMITATION, MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A PARTICULAR PURPOSE,
AND NON-INFRINGEMENT OF THIRD PARTY. IN NO EVENT WILL HIKVISION, ITS DIRECTORS,
OFFICERS, EMPLOYEES, OR AGENTS BE LIABLE TO YOU FOR ANY SPECIAL, CONSEQUENTIAL,
INCIDENTAL, OR INDIRECT DAMAGES, INCLUDING, AMONG OTHERS, DAMAGES FOR LOSS OF
BUSINESS PROFITS, BUSINESS INTERRUPTION, OR LOSS OF DATA OR DOCUMENTATION, IN
CONNECTION WITH THE USE OF THIS PRODUCT, EVEN IF HIKVISION HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.

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REGARDING TO THE PRODUCT WITH INTERNET ACCESS, THE USE OF PRODUCT SHALL BE WHOLLY
AT YOUR OWN RISKS. HIKVISION SHALL NOT TAKE ANY RESPONSIBILITIES FOR ABNORMAL
OPERATION, PRIVACY LEAKAGE OR OTHER DAMAGES RESULTING FROM CYBER ATTACK, HACKER
ATTACK, VIRUS INSPECTION, OR OTHER INTERNET SECURITY RISKS; HOWEVER, HIKVISION WILL
PROVIDE TIMELY TECHNICAL SUPPORT IF REQUIRED.
SURVEILLANCE LAWS VARY BY JURISDICTION. PLEASE CHECK ALL RELEVANT LAWS IN YOUR
JURISDICTION BEFORE USING THIS PRODUCT IN ORDER TO ENSURE THAT YOUR USE CONFORMS
THE APPLICABLE LAW. HIKVISION SHALL NOT BE LIABLE IN THE EVENT THAT THIS PRODUCT IS USED
WITH ILLEGITIMATE PURPOSES.
IN THE EVENT OF ANY CONFLICTS BETWEEN THIS MANUAL AND THE APPLICABLE LAW, THE LATER
PREVAILS.

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Contents
CHAPTER 1 OVERVIEW....................................................................................................... 4
CHAPTER 2 POC AND ANALOG SURVEILLANCE WIRING ....................................................... 5
CHAPTER 3 THE BASICS OF POC.......................................................................................... 7
3.1 CAMERA CONNECTION............................................................................................................7
3.2 CAMERA POWER SUPPLY SCENARIOS .........................................................................................7
3.3 DUAL-POWER SUPPLY .............................................................................................................8
3.4 AT/AF MODE .......................................................................................................................8
3.5 POC ACCESS CAPABILITY .........................................................................................................8
3.6 INSUFFICIENT POC POWER ......................................................................................................8
3.7 CAMERA ACCESS TIME............................................................................................................9
CHAPTER 4 POC CONNECTION AND TRANSMISSION DISTANCE.......................................... 10
4.1 CONNECTION METHOD.........................................................................................................10
4.2 TRANSMISSION DISTANCE......................................................................................................10
4.3 EXTEND TRANSMISSION DISTANCE ..........................................................................................10
CHAPTER 5 POC DEVICE MODEL ....................................................................................... 11
5.1.1 DVR..........................................................................................................................11
5.1.2 Camera ....................................................................................................................11
5.1.3 PTZ Dome................................................................................................................11
CHAPTER 6 GUI, EXCEPTION AND LOG OF POC DVR........................................................... 12
6.1 POC INFORMATION ..............................................................................................................12
6.2 POC MODULE EXCEPTION .....................................................................................................12
6.3 LOG...................................................................................................................................13
CHAPTER 7 POC SAFETY FEATURES ................................................................................... 15

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Chapter 1 Overview
From 2017, Hikvision released Turbo 4.0 DVR products. It is a big technical improvement from
previous ones and the function of PoC (Power Over Coaxial) is a highlight. In this white paper, the
theory of PoC, as well as its application and possible exceptions, will be explained.

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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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Figure 2-2 PoC 1.0 Wiring
PoC 2.0 wiring: The cameras are connected to DVR through a coaxial cable that transmits video
signals, control signals and power supply.
Figure 2-3 PoC 2.0 Wiring

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Chapter 3 The Basics of PoC
3.1 Camera Connection
Figure 3-1 Camera Connection
Only Hikvision PoC camera can be connected to a PoC DVR. A self-powered PoC camera can
be connected to a non-PoC DVR.
Turn off the PoC power supply function of the DVR before connecting to a non-PoC camera.
The image can be displayed if the non-PoC camera uses DC (direct current) coupling. If the
non-PoC camera use AC (alternating current) coupling, it cannot display image.
Do not connect optical transceiver or third-party PoC camera to the DVR.
Please turn off the PoC function if the camera does not support PoC, or the camera is not produced
by Hikvision. Otherwise, it may result in damage to the camera or DVR
3.2 Camera Power Supply Scenarios
First connect the camera to 12 VDC power supply, then to a DVR. The DVR detects that the
camera is connected to power and will not supply power to the camera.
First connect the camera to DVR, then add 12 VDC power supply. The power supply will not
be changed.
When powered by 12 VDC, if the power supply is stopped, the camera will shut down and
stop outputting video signals. The DVR then detects the PoC camera and provides power
supply, and the camera will restart.

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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
Allowed AT/AF Camera Access
4-ch PoC device
4 AT cameras
8-ch PoC device
8 AT cameras
16-ch PoC device
8 AT cameras + 8 AF cameras
Or up to 12 AT cameras
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
12
11
10
9
8
N (0 to 7)
AF camera access
0
2
4
6
8
16-N
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.

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Figure 3-2 Insufficient Power For PoC
3.7 Camera Access Time
Time to access single channel PoC camera: approx. 30 sec
Time to access multiple channel PoC camera: within 1 min

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Chapter 4 PoC Connection and
Transmission Distance
4.1 Connection Method
Use BNC cable
4.2 Transmission Distance
Transmission distance is related to cable material and power of the connected PoC camera. Details
are listed below.
PoC AF Camera
(2 MP)
PoC AT Camera
(2 MP)
PoC AF Camera
(4 MP)
PoC AT Camera
(4 MP)
RG6(75-5)
200m
200m
150m
150m
RG59(75-4)
200m
100m
150m
100m
Better cable material (less resistance), longer transmission distance.
4.3 Extend Transmission Distance
A PoC unit can be used to extend the transmission distance between a DVR and a PoC camera. In
the case below, the DVR can be a non-PoC DVR. The released PoC unit models are: DS-1TP04I/AT,
DS-1TP08I/AT, etc.
DVR(non-PoC)BNC
(Signal) PoC Unit BNC
(Signal+Power) PoC Camera
Figure 4-1 Extended Transmission Distance

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Chapter 5 PoC Device Model
5.1.1 DVR
Models for access of 2 MP PoC cameras: DS-7204HQHI-K1/P, DS-7208HQHI-K2/P, DS-
7216HQHI-K2/P.
Models for access of 4 MP PoC cameras: DS-7204HUHI-K1/P, DS-7208HUHI-K2/P, DS-
7216HUHI-K2/P.
5.1.2 Camera
2 MP PoC models: D0T, D8T, D9T models with "E".
4 MP PoC models: H0T, H1T, H5T models with "E".
5.1.3 PTZ Dome
Considering high power consumption of the PTZ dome, currently there is no schedule for the
release of PoC-compatible PTZ domes.

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Chapter 6 GUI, Exception and Log of PoC
DVR
6.1 PoC Information
To check PoC connection status, go to Camera Management -> Camera -> PoC Information.
You can click the channels in Poc Channel to turn on/off the PoC power supply. Turn on the
PoC power supply only when the DVR connects to Hikvision PoC camera, otherwise please
turn off the PoC power supply.
You can see the type of currently connected cameras. The icon of the channel that is
connected to an AT/AF cameras will be lit and display AT or AF accordingly.
You can see the number of currently connected and connectable AT/AF cameras under
channel information.
In PoC information, the power consumption of currently connected cameras and remaining
available power is displayed.
Figure 6-1 PoC Information
6.2 PoC Module Exception
PoC Module Exception can be selected under Exception Type, and the DVR will detect PoC
exceptions such as PoC module exception, PoC and motherboard communication exception, and
PoC camera exception.

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Figure 6-2 Exception Configuration
You can also configure different linked actions for PoC exception.
6.3 Log
Three types of exceptions will be recorded in the logs:
PoC module communication exception
Possible cause: Communication exception between PoC module and motherboard.
PoC module does not exist
Possible cause: PoC board is not tightly connected or has been removed, or the PoC module is not
detected by motherboard.
PoC module short circuit exception
Possible cause: PoC camera exception.

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Figure 6-3 Log Information

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Chapter 7 PoC Safety Features
The safety features of PoC include:
1. Overcurrent protection. The PoC system monitors the output current in real-time and will cut
off power output to protect the system in case of overcurrent.
2. Undervoltage protection. When a PoC camera or the cables short-circuited, the PoC module
will actively cut off its power supply while power supply of other channels is not affected.
3. Auto-adaptive. When a camera is connected, the PoC device will detect whether it is an AT or
AF model so that the camera will not be damaged as a result of mismatched power supply.

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