PoE is called Power over Ethernet. A complete PoE system consists of PSE(Power Sourcing Equipment) and PD(Powered Device). In this article, we will introduce several connection methods of PoE Switch to show you how it connects to terminal devices such as IP cameras.
4 Methods of Connecting PoE Switch to IP Camera (Terminals)
1. Both switch and terminal devices support PoE.
In this case, the PoE switch can connect to wireless AP and IP cameras via cable directly. This is the easiest way but you should also notice:
● Make sure the PoE switch, wireless AP, or IP camera are the standard PoE devices.
● Reconfirm the specification and quality of the cable. The bad cable will result in restarting constantly or being unable to receive power.
2. The switch supports PoE but the terminal does not support PoE.
On this occasion, the PoE switch should connect 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, which is a common network cable. The power output is 5V/9/12V, etc., which supports the IEEE 802.3af/802.3at standard and can match various non-PoE powered terminals with DC input. The data signal output line that is the ordinary network cable can be directly connected to the Ethernet port of the non-PoE powered terminal.
3. The switch doesn’t support PoE while the terminal equipment supports PoE.
Under this circumstance, the switch can be connected to the PoE injector. Then the PoE injector powers the terminal equipment and transmits data to it via cable. This solution is conducive to expanding the original wiring network and there is no impact on the original network.
4. The Ethernet switch and the terminals don’t support PoE.
In this scheme, the switch is connected to the PoE injector, the PoE splitter, and the terminals in sequence. Case 3 and 4 are suitable for the transformation of traditional networks, in which the original switch does not support PoE power supply but requires taking advantage of PoE power supply.
How is the PoE Power supply connected?
In practical application, some people may have some understanding of POE power supply technology and know the power supply line sequence problems such as 1/2(+),3/6(-) or 4/5 (+),7/8(-). Therefore, they are afraid that in case of wrong connection, it will lead to serious consequences such as equipment burnout.
The POE power supply standard requires POE switches, POE power supply modules (POE power supply) and other PSE equipment as long as they support one of the 1/2(+),3/6(-) or 4/5 (+),7/8(-) power supply line sequences. Of course, the latest 802.3at 4 pair standard requires that both kinds are supported simultaneously. The requirement for PoE PD is to support two power supply modes at the same time.
● If your PoE switch and PoE power supply module are standard PSE devices, then the cable will not be burnt whether you connect it to the wireless AP or IPC. The standard POE power supply process has a detection process, which will ensure that the non-standard power receiving equipment will not be powered.
● If your PSE device is a forced supply type, you must carefully check the manual before wiring to see if the power supply PIN is 1/2(+),3/6(-) or 4/5 (+),7/8(-). If there is no manual around you, you can also use a multimeter to test. The stable 12V/24/48V output is the power supply pin. After figuring out the power supply PIN pin, it cannot be directly connected to the terminal device. The wireless AP or IPC at the other end needs to find out what the input voltage is and whether the network port circuit has been modified. If the circuit is not modified, a PoE splitter is required.
