Three minutes to figure out the three main power supply modes of the monitoring system

In the video surveillance project, you need to consider the power supply mode of the camera. What kind of power supply can achieve the ideal monitoring effect and save engineering cost as much as possible? First, you need to understand several ways to power 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 communication power is distributed and distributed to each communication device.

The advantage of the centralized power supply scheme is to uniformly control and manage the power supply scheme, reduce the use of engineering cables, and beautify the engineering route. However, please note that when using the centralized power supply scheme, ensure that the total capacity of the centralized power supply equipment is greater than the sum of the service capacity of the downstream load. At the same time, it should also be considered that the cable diameter of the front-end cable should meet the current demand and wire diameter requirements of all the loads in the latter stage.

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.

Advantages: Convenient construction, easy maintenance, unified control and management.

Disadvantages: DC low-voltage power supply transmission distance is too high, the voltage loss is high, and the anti-interference ability during transmission is poor.

The data center management object mainly includes two parts of infrastructure and IT infrastructure. The infrastructure includes power supply and distribution, UPS, air conditioning, fire protection, security, environmental monitoring and other computer room systems; the infrastructure includes network equipment, host equipment, and storage equipment. Wait for IT equipment.

The goal of centralized monitoring is to be able to monitor the operation of infrastructure and IT infrastructure through management and technology applications, real-time discovery and notification of faults and anomalies; in addition, it can collect and organize monitoring data for capacity. Management, event management, problem management, and compliance management provide the basis for analytics and ultimately the goal of high availability in the data center.

Second, point-to-point power supply

Point-to-point power supply means that 220V AC is directly taken from the monitoring room, and a separate DC12V power supply is connected next to the camera. Then it is connected to the surveillance camera and the bracket can be installed.

Advantages: 220V AC has low voltage loss during transmission and strong anti-interference ability.

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 to the existing Ethernet Cat.5 cabling infrastructure. This method is mainly applied to high-definition network digital monitoring systems.

Advantages: Reduced cost, flexible deployment, single-port power up to 30W.

Disadvantages: The quality of the network cable is high and the transmission distance is limited.

Fourth, matters needing attention

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.

Point-to-point power supply, near power, can save the use of the line, is a big savings, but after-sales maintenance, extremely difficult to repair; this is a certain, centralized power supply has a benefit, future maintenance is easy, not easy to go wrong, but not If you are doing this, you will use the peer-to-peer power supply if you are finished doing this. It is a long-term one that uses centralized power supply.

If there are more outlets, use separate power to draw power. If there is not much, use centralized ones. If it is indoors, use a good sheathed power cord.

When the number of cameras is relatively large and the distance of power supply does not exceed 100 meters, it is recommended to use PoE power supply. It is convenient and quick to use without special construction, but pay attention to the choice of PoE power supply equipment.