Check the listing for details. 3pcs Poe separator / combiner / synthetic power supply module CPE AP 5-48v. Condition: New. Listed at 7.17 USD. Detailed description of 100m Poe power supply combiner:1. The data transmission of Poe combiner separator will use (1 / 2; 3 / 6) pin transmission above CAT5, while the POE power supply will use (4 / 5; 7 / 8) pin transmission technology for operation.2. It has simple wall hanging and simple connection mode, which provides a better solution for difficult power supply setting, provides a simple erection mode for complex environment, and saves unnecessary wiring cost.3. DC external negative electrode 5.5 * internal positive electrode 2.1mm, which can be powered by DC 5 ~ 48V4. Maximum current 3000ma; Poe power synthesizer is also called combiner (excluding power supply part); Number of ports: 25. RJ45 interface with shield6. It can be fixed on the wall with self tapping screws, and those without sleeve ears can also be stuck on the wall with double-sided adhesive at will for simple installation7. Optional LED light to ensure voltage and current8. Package: PC film bagSuitable for network telephone, network video head, AP, bridge, Poe network switch, network cable power supply, etcDC = power adapter (using 5V power adapter for power supply, the power supply distance of network cable shall not exceed 10m, and that of 9V, 12V and 15 power adapters; the power supply distance of network cable shall not exceed 30m, and that of 24V power adapter; the power supply distance of network cable shall not exceed 80m, and that of 48V adapter; the power supply distance of network cable can reach 100m.1. Why choose 15V Poe power supply?Because the power supply of the network cable will produce voltage drop, when the power supply voltage of most APS is 12V, the voltage will drop below 12V after power supply with the network cable of more than 10m, which will give the AP normal operation. If it is 12vpoe, the voltage may be insufficient and affect the normal operation of the AP. On the contrary, if the voltage is too high, it will burn the machine, so it is appropriate to comprehensively consider the 15V voltage.2. Power supply distance: Generally speaking, in the case of pure copper network cable and 12V or 15V power supply, the distance is about 30m (the actual use distance is related to the network cable quality, power supply voltage and voltage adaptability of power receiving equipment). The higher the voltage, the OK network cable quality and the farther the effective power supply distance.Because the general network only uses 1236 to transmit data (network data) and 4578 is idle, most of the merchants of many production network lines produce network lines with four iron wires and non pure copper wires. If such wires are used for POE power supply, the power supply voltage drop will be very largeBecause the network cable is very thin, the quality residual is uneven, and some are iron wire, copper-clad aluminum wire. The resistance of the network cable is very large and the loss is very serious. The actual test results: when the general network cable is 12V, the voltage is about 12V and the distance is within 20m3. How to distinguish the quality of network cable:1. Look at the material from the outer skin: push out the outer skin of the network cable by hand. The soft one looks like a little hollow. It is of poor quality, and the one with good quality feels full.2. Judge the tension of the mesh cable: if the elasticity of the outer skin is very large, but the quality is poor, it is easy to break the inner core when pulling the wire with force.3. Go deep into the copper core to see the composition: cut off a small section of network cable with scissors or network cable pliers. If the core of the network cable is copper, but the inner core is silver white steel core, it is relatively poor, 1 yuan per meter. If there is yellow copper inside and outside, the quality is OK, 2-3 yuan per meter.4. In addition, the thickness of the copper core should also be considered. Some use less materials, the copper core is relatively thin, and some are relatively thick. For category 5 network cables, just look at the above. For Category 6 and 7 network cables with shielding function, it also depends on the shielding layer in the network cable. Some of the eight network cables are uniformly wrapped in the outer skin, while others are wrapped with shielding layer for each pair of network cables. This is Differences.Why do some people say that a few meters of power supply is not enough? (network cable material is important)Tips on network cable self detection:1. Iron wire can generally be checked with a strong magnet, which cannot be used;2. Zinc copper wire (also known as brass, the zinc content is about 32% ~ 39%, and people in computer city are generally called pure copper). This kind of copper wire is generally softer than iron wire and harder than oxygen free copper. The inspection method is to scrape with a blade. If there is an obvious color difference between the scraped internal color and the outer skin, it must be zinc copper, or even copper plated.3. Oxygen free copper wire (also known as phosphor copper), which is generally made of soft material. After being cut short, it looks at the cross section, and the color is the same as the skin. This kind of wire is generally the super class 5 wire of the national standard, which is generally 9 cores (one of which is the grounding wire) For example, Anpu's. because the profit of network cable is not too high, the network cable sellers in the electronic city generally sell zinc copper as oxygen free copper. If they only use the Internet, oxygen free copper can be 180 meters, but zinc copper can only be 130 ~ 150 meters.In addition, there are four copper and four iron network cables. Generally, 1236 is copper and 4578 is iron. This kind of cable can not be used for wireless bridge! Unless you swap 1236 and 4578, you must ask clearly when buying this kind of cable. 4578 is iron, and you can't buy itPOE (power over Ethernet) refers to some IP based terminals (such as IP telephone, wireless LAN access point AP, network camera, etc.) without any change to the existing Ethernet cat. 5 cabling infrastructure While transmitting data signals, Poe technology can also provide DC power supply for such equipment. Poe technology can ensure the normal operation of the existing network and minimize the cost while ensuring the safety of the existing structured cabling.Poe is also known as power over LAN (POL) or active Ethernet (active Ethernet), and sometimes referred to as Ethernet power supply. It is the latest standard specification for transmitting data and electric power simultaneously by using the existing standard Ethernet transmission cable, and maintains the compatibility with the existing Ethernet system and users.IEEE 802.3 standard is a new standard based on POE of Ethernet power supply system. It adds relevant standards of direct power supply through network cable on the basis of IEEE 802.3. It is not only an extension of the existing Ethernet standard, but also the first international standard on power distribution.Quantity: 3pcs