The power supply mode of network camera is somewhat point-to-point power supply, centralized power supply and PoE power supply, which can be reasonably selected according to the specific situation of network monitoring. PoE power supply has developed rapidly in recent years, and is popular for its convenient installation, convenient management and energy saving. You can refer to the PoE power supply switch of fengrunda, which has many kinds, excellent performance and high cost performance. In addition to PoE power, centralized power is also a good option.
When connecting the monitor camera to power in the centralized power supply scheme, do not connect the remote monitor camera to the same power source as the closer monitor camera. If connected to the same power source, the power supply voltage is high, it will burn the camera at close range, the power supply is low, and the camera at a far distance has no image. If the monitoring distance is too far, higher voltage power supply needs to be configured, such as 30V, 36V and so on, or even 220V ac power supply directly, and the voltage will be changed to the front end.
Network camera power supply configuration taboo
The whole monitoring system shares one power source. All surveillance cameras share one power source, and when the power fails, the entire closed-circuit system is paralyzed. In particular, some important entrance images cannot be monitored, which may cause unnecessary trouble.
So what's the right thing to do? System maintenance, often need to turn on and off the power. All cameras start at the same time when the power is turned on, and the starting current is particularly large, which has a great impact on the power supply and will seriously burn the power supply.
Network camera power supply power configuration
The problem often embarrassed inexperienced young engineers, many solutions when implementing are found that the original design of power supply capacity is insufficient, need additional equipment, and party a stalling phenomenon. In fact, because the cameras are starting moment, the starting current is very big, plus project of long distance transmission loss, so the network surveillance cameras need power supply, put all the power rating of the camera is not a simple addition. The correct approach is to add the rated power of the camera of the whole monitoring system and multiply it by 1.3 times, which is the actual power required by the camera, and then add about 30% loss. Finally, add the remaining 30% for future expansion.
The choice of power supply, you should already know, the last is about more than domestic power and inferior, the actual less than 1 a, 2 a purchasing power to choose the brand, to bring load test, is the so-called foot Ann.