Do you really understand the knowledge about PoE switches?
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At this point, the best method is the PoE power supply method, which is different from the common way of taking power from the wires, but it is powered by the network cable. Someone wonders: If the network cable is not transmitting network data, can it also transmit electricity? This will talk about this PoE technology.
PoE translated into Chinese is Power over Ethernet, which means that through the cable system power supply, through the cable can be transmitted to the power needs of the device, and no longer need the traditional way of power supply.
As we all know, network monitoring is a monitoring system based on the network. It is natural to use network cables to transmit video data. At this time, the same cable can transmit data and transmit power. Is it convenient? No longer worry about powering the surveillance camera.
Let's talk about PoE switches. It is a type of switch. It differs from common switches. Ordinary switches only transmit data. PoE switches can transmit and transmit power. Slightly larger-scale monitoring systems generally use switches. We only need to replace PoE switches with ordinary ones.
The voltage supplied by the PoE switch is generally 44 to 57 VDC, typically 48V, and 52V. But also to follow the power supply standard, there are two kinds of af and at, the former allows to provide 15.4W of power, the latter allows the provision of 30W of power, the choice of what standard PoE switch to be determined based on the power of the camera.
And there are still some non-standard PoE switches. Feng Runda, a leading brand of professional PoE switches, reminds everyone to try not to use them. Otherwise, you may be able to burn out some of your equipment that needs to be powered. You must use standards.
Remember, not all surveillance cameras can be powered by PoE switches, but those that support PoE power. Otherwise, add other devices. Here is the monitoring system application collocation mode:
PoE switch ----- PoE camera PoE switch ------PoE separator ----- ordinary camera ordinary camera ------ PoE power supply ----- PoE camera ordinary camera --- ---PoE power supply ------PoE separator ------common camera Of course, everything has two aspects, although PoE switch to the surveillance camera power supply comparison, but the construction is more flexible, but there are A bad place is that the distance of power supply cannot exceed 100 meters.
The above is not to say that PoE power supply is powered by a network cable, that is to say the distance between the surveillance camera and the PoE switch cannot exceed 100 meters, otherwise it will cause video data transmission problems.