Use of Poe switch! Four points for attention in practical monitoring engineering
發(fā)布時(shí)間：2021-03-15 瀏覽量：1029
Today, let's talk about Poe switches that are widely used in security monitoring. Now network digital surveillance camera often uses Poe switch, because Poe switch is a common switch based on the power supply module.
Poe switch can supply power to the network camera through the network cable. It not only has all the functions of the switch, but also provides power supply for the camera. The general output power is 15.4W (16W) - 25.5w (30W), which is in line with ieee802.3af/802.3at standard.
The use of Poe switch, four points of attention in the actual monitoring project
① The key technology of Poe switch is Poe power supply technology. In the process of application, the terminal equipment of webcam depends on whether it supports Poe power supply. If it supports Poe power supply, it can be directly connected with POE switch and network cable.
② If the webcam does not support Poe power supply, then directly lay the power cable + network cable. However, many engineering companies like to use Poe switches when they install them. What should we do? Xiaobian has a coup to add a Poe separator. Look at the picture
Poe separator is added at the other end of the POE switch output, which splits the data signal and power. After splitting, there will be a power supply and a network cable, which will be connected to the network surveillance camera.
③ How does the POE switch work?
The working process of Poe switch needs to go through the following processes: detection PD end equipment classification power supply power failure. The first detection is to detect the connection of cable terminal. The second step is to classify the power receiving equipment that supports IEEE standard, and then start to supply 48V DC power supply to meet the power consumption of no more than 15.4W.
④ There are standard Poe and non-standard POE in Poe power supply market. The difference is the cable selection of crystal head. Standard Poe power supply is 1-2-3-6 four core simultaneous transmission of data and current. Non standard Poe uses 1-2-3-6 to transmit data and 4-5-7-8 to transmit current, so you have to know which one to use, because if you need to use supporting equipment, such as Poe separator, you also need to choose the corresponding one. Standard Poe separator, non-standard Poe separator.
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