How to choose the three power supply modes in the security monitoring project?

October 11 12:15:38, 2020

In the video surveillance project, you need to consider the power supply mode of the camera. What power supply method can achieve the best monitoring effect? How to maximize the cost of engineering? First, you need to understand several ways of powering the camera in the video surveillance project.
 
First, centralized power supply
 
Centralized power supply refers to the way in which the source equipment is centrally installed in the power room and the battery room, and the power is uniformly distributed and distributed to each communication device.
 

Centralized power supply: Connect 12V centralized power supply at 220V power supply, and then connect to the camera with 2*1.0 red and black power cables respectively. The 12V power supply distance should not exceed 100 meters. Connect a single power cord connector and connect a single power cord connector to the surveillance camera power connector. The centralized power supply mode refers to the centralized power supply to the front-end load by using a 12V switching power supply in the monitoring room or at an intermediate point.
 
Centralized monitoring
 
The data center management object mainly includes two parts of infrastructure and IT infrastructure, such as power distribution, network equipment, security, etc. The purpose of centralized monitoring is to be able to run the infrastructure and IT infrastructure through management and technology applications. The situation is monitored to realize real-time discovery and notification of faults and abnormalities. In addition, the monitoring data can be collected and organized to provide an analysis basis for capacity management, event management, problem management, and compliance management, and finally achieve high availability of the data center. aims.
 
Advantages: Convenient construction, easy maintenance, unified control and management.
 
Disadvantages: The previous configuration is complicated, the DC low-voltage power supply transmission distance is too high, the voltage loss is high, and the anti-interference ability during transmission is poor.
 
　 Second, point-to-point power supply
 
Point-to-point power supply: refers to 220V AC directly from the monitoring room, connected to a separate DC12V power supply next to the camera, and then connected to the surveillance camera, the bracket can be installed.
 


Advantages: 220V AC has low voltage loss and strong anti-interference ability during transmission.
 
Disadvantages: Each point must be installed with a power supply, which is more troublesome to construct.
 
Third, PoE power supply
 
PoE power supply refers to the technology of providing DC power to other devices without any modification of the existing Ethernet Cat.5 cabling infrastructure. This method is mainly applied to high-definition network digital monitoring systems.


Advantages: Reduce cost, flexible deployment, convenient and fast, beautiful and beautiful, single port maximum power up to 30W.
 
Disadvantages: The quality of the network cable is high, the transmission distance is limited, and the power of the powered device cannot exceed 30W.
 
Precautions
 
1. When using an infrared camera, centralized power supply is not recommended. Because the current is large when the infrared is turned on, it is difficult to ensure the infrared effect of all the cameras by the centralized power supply mode.
 
2, point-to-point power supply, near power, can save the use of the line, is a big savings, but after-sales maintenance, extreme maintenance is difficult; this is affirmative, centralized power supply has a benefit, future maintenance is easy, not easy to go wrong, But if you don't worry about the wire, if you just pat the butt and leave, you can use the point-to-point power supply. It is good for the long-term use of centralized power supply.
 
3, if the socket is more, use the separate to draw power, if not much then use the centralized, if it is indoors, you can use a good sheathed power cord.
 
4, when the number of cameras is relatively large, the distance of the power supply does not exceed 100 meters, it is recommended to use PoE power supply, no special construction, convenient and fast, but pay attention to the choice of PoE power supply equipment.
 

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