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Option to buy security monitoring power supply
time2006/12/08
- As the power source of the whole security system, consumers must be cautious when choosing. If you choose a little carelessness, it will cause security risks. How to buy it? Pay attention to the following points when purchasing security monitoring power supply
As the power source of the whole security system, consumers must be cautious when choosing. If you choose a little carelessness, it will cause security risks. How to buy it? Pay attention to the following points when purchasing security monitoring power supply:
First, clear use, correct choice
First, determine the input voltage and input current type of the surveillance camera used. Generally speaking, the input voltage of the surveillance camera is mostly 12V or 24V, the input current type is mostly DC power, the input current of a few ball machines is AC power, and some cameras are common to AC and DC power.
Second, determine the power supply method. At present, the main power supply modes include independent power supply mode and centralized power supply mode. There are many disadvantages in centralized power supply. For example, surveillance cameras in centralized power supply mode may cause different actual input power sources due to different distances, which are not detailed here.
After determining the input voltage and input current type required for the surveillance camera, the appropriate power supply safety number is selected according to the power of the surveillance camera. Generally, it is most suitable to select a security monitoring power supply with a slightly higher security. The number is too low, can not afford to monitor the camera or affect the life of the surveillance camera. The higher the security monitoring power supply number is, the higher the price is. If you choose the security monitoring power supply with too high security, it will increase the unnecessary cost.
Second, understand the use of the environment and the protection of the power supply
The use environment of the surveillance camera mainly includes indoor and outdoor. The surveillance camera installed outdoors should pay special attention to the waterproof function of the security monitoring power supply. In addition to the waterproof function, it is also necessary to pay attention to the lightning protection function and heat dissipation performance of the security monitoring power supply. The thermal performance of the security monitoring power supply is especially important. In general, the camera is basically 24 hours of uninterrupted work, which means that the security monitoring power supply is also 24 hours of continuous operation. The better the thermal performance of the security monitoring power supply, the longer the working life of the electronic components, which ensures that the monitoring system continues to work and reduces the operating cost of the monitoring system. The thermal performance of the security monitoring power supply has a lot to do with its circuit design. The more reasonable the circuit design is the security monitoring power supply, the higher the conversion efficiency, the less heat it radiates. In addition, the thermal performance of the security monitoring power supply is also closely related to its outer casing, and the metal outer casing has better thermal conductivity than the plastic outer casing.
Third, a reasonable budget, do not lose because of small
At present, there are a large number of power supplies for cutting corners in the security market, and even some poor manufacturers use a large amount of recycled materials to produce power. The price of these inferior power supplies is often unreasonably low. From the appearance, there is not much difference with high-quality power supply. However, the housing is removed, and the wiring and components of the circuit board can clearly see the low-cost reason for the inferior power supply. Customers are advised to perform tests before purchasing the power supply. If conditions permit, it is best to open the case and carefully check the internal structure.
Only when a suitable security monitoring power supply is selected can the entire security monitoring system be stabilized. Shenzhen Lianyunda electronic professional power supply manufacturer, the joint power supply "finely crafted" "appearance fashion" "stable performance" "good quality" with the intermodal power supply, OK!