What are the advantages of PoE network HD cameras?
PoE is also known as the power supply system based on LAN (POL, Power over LAN (Active Ethernet) or active Ethernet), is sometimes referred to as the power of Ethernet, PoE can use the existing standard Ethernet cable in the transmission of data signals at the same time, can also provide DC power supply technology for this kind of network equipment. IEEE 802.3af standard is a new standard Ethernet power supply system based on PoE, which based on the IEEE 802.3 increased by standard direct power supply cable, we all know that the five cable standard of four twisted pair, but in the l0M BASE-T and 100M BASE-T in only two of them on.
By providing power to the device via PoE, the IEEE80 2.3af allows for two uses: idle power supply and data leg power supply. When the idle pin is used for power supply, the 4 and the 5 pins are connected to the positive electrode, and the 7 and the 8 feet are connected to the negative electrode. When the data foot is used for power supply, the transmission of the power supply is different from that of the Ethernet data signal so that the transmission of data is not affected. In this way, the 1, the line and the line pair 3, 6, and 2 can be arbitrary polarity.
A complete PoE system consists of two parts: the power supply end device (PSE, Power Sourcing Equipment) and the receiving end device (PD, Power Device). The PSE device is a power supply device for an Ethernet client device, and is also the manager of the entire PoE Ethernet power supply process. The PD device is receiving power PSE load, namely the POE system client devices, such as network camera, so that the camera position is no longer required by another arrangement of power socket and power line of the power supply network camera. Hong Ruiguang Xiang PoE switch can be a good realization of PoE network HD camera.
The main power supply parameters:
1 voltage in the range from 44 to 57V, the typical value is 48V;
2 allow the maximum current of 550mA, the maximum starting current is 500mA;
3 typical operating current of 10 ~ 350mA, overload detection current of 350 ~ 500mA;
4 under no-load condition, the maximum current is 5mA;
5 for PD equipment to provide 3.84 ~ 12.95W electric power requirements of five grades, the maximum not more than 13W.
Camera network camera or POE network camera compared with the traditional, only one cable can work normally, simple and convenient installation, minimize construction costs, reduce the risk caused by power supply problems, make the network equipment more convenient management. POE network camera can be used to set up the power cord or the need for frequent movement of indoor and outdoor places.