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Some friends have some questions about poe power supply. This has been asked by many friends before, so today we use pictures and texts to learn about several power supply methods and connection methods of poe.
First, switches and terminals support PoE
In this way, the PoE switch is directly connected to the wireless AP and the network camera supporting the PoE power supply through the network cable. This method is simple, but also needs to pay attention to the following two points:
1. Determine whether the PoE switch and the wireless AP or network camera are standard PoE devices.
2. Carefully confirm the specifications of the purchased network cable. The quality of the network cable is critical. A poor quality network cable will cause the AP or IPC to be unable to receive power or restart.
Poe switch connection
Second, the switch supports PoE, and the terminal does not support PoE.
The PoE switch is connected to the PoE splitter. The PoE splitter separates the power supply into data signals and power. There are two output lines, one is the power output line, and the other is the network data signal output line, that is, the ordinary network cable. The power output has 5V/9/12V, etc. It can match various DC input non-PoE powered terminals and supports IEEE 802.3af/802.3at standard. The data signal output line, that is, the ordinary network cable, can be directly connected to the network port of the non-PoE power receiving terminal.
Poe separator connection
Third, the switch does not support PoE, and the terminal supports PoE.
The solution switch comes out to the PoE power supply, and the PoE power supply adds power to the network line and transmits it to the terminal. This kind of scheme is conducive to expanding the original wiring network and has no impact on the original network.
Poe camera + poe power supply connection
Fourth, the switch does not support PoE, and the terminal does not support PoE.
The switch of this solution comes out to the PoE power supply, then to the PoE splitter, and finally to the terminal. Solution 3 and Option 4 are suitable for the transformation of the traditional network, that is, the original switch does not support PoE power supply, but wants to take advantage of PoE power supply.
Poe power supply connection method
In the actual application, how should the network cable be connected? Many friends have some understanding of the POE power supply technology, and know the power supply sequence problems such as 1 2 3 6 or 4 5 7 8 , so they are afraid of the wrong connection, resulting in serious consequences such as equipment burning. .
POE power supply standard requirements for PSE equipment such as POE switches and POE power supply modules (POE power supplies) are as long as one of the 1 2 3 6 and 4 5 7 8 power supply lines is supported. Of course, the new 802.3at 4pair standard requires Both are supported at the same time. The requirement for POE powered devices is that they must support both power supply modes.
How to pick it up
1. If your POE switch and POE power supply module are standard PSE devices, then the network cable will not be burned if you connect the wireless AP or IPC below. In the standard POE power supply process, there is a detection process that ensures that power is not supplied to powered devices that are not standard. How to distinguish between standard equipment and non-standard equipment, see how to distinguish between standard POE power supply and non-standard POE power supply.
2. If your PSE device is a strong supply type, you must be very careful to check the manual before wiring. See if the power supply PIN pin is 1 2 3 6 or 4 5 7 8. If there is no manual, you can also use a multimeter to detect if there is The stable 12V/24/48V output is the power supply pin. I figured out the power supply PIN pin and I can't directly connect to the terminal device. The wireless AP or IPC at the other end should figure out what the input voltage is, and whether the network port circuit has been modified. If it has not been modified, it will probably burn the network port circuit after it is connected. If the circuit is not modified, a POE separator is required.
Understand the above two points, in the engineering application, before the wiring, the chest is full. There are a lot of non-standard equipment on the market, so be very careful before wiring.