Last time I talked about how to choose a network cable for a POE switch? Then, many friends wondered how to connect, but it is actually very simple. Directly use the RJ45 network cable interface to directly supply power to the equipment that supports POE power supply.
If you ask which RJ45 crystal plugs are used for power supply, the answer is as follows: 1236 (white orange, orange, white green, green) running data (currently only four types of network cable connections are used), 45 (blue, white) Blue) Power supply positive 78 (white-brown, brown) power supply negative.
The POE power supply system uses twisted-pair cables (also known as network cables) to carry out communication signals and power transmission. Generally speaking, digital network signals are transmitted through differential cables through network cables above CAT.5 (including). At the same time, power is supplied to the PD end.
The first type requires an 8-core network cable, which is powered by the idle ports 4, 5, 6, and 7, while the other data ports are used to transmit digital network signals. In this network cable, the signal and power are actually transmitted through different lines. It’s just not visible on the surface.
The second type, if a 4-core network cable is used, the digital network signal and power are simultaneously transmitted through the 1, 6 data terminals, where the digital network signal and power are transmitted in the same line.
In addition to wireless bridges, other devices that need to transmit communication signals and power at the same time can use the POE power supply method, such as web cameras and other digital network equipment.
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