What is POE power supply
POE refers to the technology of providing DC power for such devices while transmitting data signals for some IP-based terminals without any changes to the existing Ethernet Cat.5 cabling infrastructure. POE, also known as LAN-based power supply system or active Ethernet, sometimes also referred to as Power over Ethernet, is the latest standard specification for the simultaneous transmission of data and electrical power using existing standard Ethernet transmission cables, and is maintained with existing ones. Ethernet system and user compatibility.
Therefore, the premise of POE power supply: There must be a power supply (generally a POE switch). Most of the current POE power supply equipment on the market is 48 V DC.
In principle, the pickups cannot be directly powered by POE because most of the pickups on the market are powered by 12V. In addition, the pickups (analogues) must rely on the webcam as a transmission and therefore cannot be designed to conform to RJ45 sockets. Therefore, if you use POE to power the pickups, you must use some transformation equipment.
POE separator: The POE separator is opposite to the POE power supply and separates data signals from power.
POE separator
The current that separates the data from the power can supply power to the pickup, and the data continues to connect to the network camera. If the separated current supplies only one pickup, then it loses the meaning of POE power supply, so in order to power the pickup and the camera at the same time, other accessories are needed.
Connected equipment
The more common camera on the market:
Most of the pickups on the market are three-wire.
Through the above accessories, a complete POE power supply audio monitoring system is formed; the overall wiring diagram is as follows.
special reminder:
At present, the POE power supply has very obvious advantages in weak current monitoring systems. At the same time, because the effect of the splitter is different, in the course of separating the power supply and the signal, some of the splitters may not be able to provide a clean power supply for the pickups, which may affect the pickup (problems such as current noise). Therefore, it is very important to use POE to select the separator. (From Guangzhou Sizheng Electronic Technology Co., Ltd.
Leather Care
The fundamental reason why leather is soft is that when leather is made, oil is introduced into the interior of animal skin to form an oil film that completely covers the surface of the fibers inside the skin, that is, a layer of oil film with appropriate thickness is used to separate the surface of the fibers inside the skin. In this way, the friction between the fibers inside the leather is equivalent to the friction of the oil molecules, so the leather will be very soft. Its principle is similar to that of sponge, but the difference is that the inner surface fibers of dermis are separated by oil film, which makes the inner surface of dermis have sliding pores, but its pores are smaller than that of sponge, and the distribution of the inner surface fibers of dermis is not as regular as that of sponge.
Leather cleaner is used to clean leather clothes, leather sofas, leather bags, leather chairs, leather shoes and other leather products. Leather cleaning generally refers to the cleaning of the surface of leather products, excluding the cleaning inside.
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