Today the POE supplier takes you to understand several power supply methods and connection methods of POE.
Four connection methods of POE switches
First, both switches and terminals support POE
In this method, the POE switch is directly connected to the wireless AP and network camera that support POE power supply through a network cable. This method is the simplest, but it also needs to pay attention to the following two points:
1. Determine whether the POE switch and 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. Poor quality network cables will cause the AP or IPC to fail to receive power or keep restarting.
Second, the switch supports POE, and the terminal does not support POE.
In this solution, the POE switch is connected to a POE splitter. The POE splitter for wireless APs 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 is 5V / 9 / 12V, etc., which can match various DC input non-POE powered terminals, and supports IEEE 802.3af / 802.3at standards. 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.
Third, the switch does not support POE, the terminal supports POE
In this solution, the switch comes out and connects to the POE power supply. The POE power supply adds power to the network cable and transmits it to the terminal. This solution is beneficial to the expansion of the existing wiring network and has no impact on the original network.
Fourth, the switch does not support POE, and the terminal does not support POE
In this solution, the switch comes out to connect to the POE power supply, then to the POE splitter, and finally transmits to the terminal. Solution three and solution four are suitable for the transformation of traditional networks, that is, the original switches do not support POE power supply, but want to take advantage of the benefits of POE power supply.
Connection method of POE power supply
In actual application, how should the network cable be connected? Many friends have some knowledge of POE power supply technology, knowing the power supply line sequence problems such as 1 2 3 6 or 4 5 7 8.
The requirements of the POE power supply standard for PSE equipment such as POE switches, POE power supply modules (POE power supplies) are as long as it supports one of the 1 2 3 6 and 4 5 7 8 power supply line sequences. Both are supported simultaneously. The requirement for POE power receiving equipment is that it must support two power supply methods at the same time.
How to pick it up
1. If your POE switch and POE power supply module are standard PSE devices, then the network cable can be connected to the wireless AP or IPC connected below without burning. The standard POE power supply process has a testing process, which will ensure that power is not supplied to non-standard powered devices.
2. If your PSE device is a strong supply type, you must check the manual very carefully before wiring to see if the power supply PIN is 1 2 3 6 or 4 5 7 8. If there is no manual nearby, you can also use a multimeter to detect it. The stable 12V / 24 / 48V output is the power supply pin. After clearing the power supply PIN, you cannot directly connect to the terminal device. The wireless AP or IPC at the other end needs to know what the input voltage is, and whether the network port circuit has been modified. If it has not been modified, the network port circuit may be burned after being connected. If the circuit is not modified, a POE separator is needed.