POE power parameters
1. Product name/model: 100M POE power supply
2. Number of interfaces/purpose: 1 POE power supply port, 1 LAN port; POE = power + signal, LAN = signal
3. Input voltage: 100-240V/AC 50-60Hz
4. The output voltage: 12V 1A
5. Full power: 12W
6. Transmission distance: Effective transmission distance is within 1-100 meters (the higher the voltage, the farther the transmission distance)
7. Power supply: 45+(positive pole);78-(negative pole)
8. POE protocol standard: IEEE802.3af/at
9. Network bandwidth: 10/100Mbps
10. Operating temperature: -50C~+75C
11. Scope of application: Applicable to POE-powered IP phones/wireless APs/bridges/POE cameras and other network equipment
12. Product Size: 83.5mmx47mmx31mm
12V1A POE parameter example:
1. INPUT CHARACTERISTICS
1. Strong power supply type = power supply can be supplied by plugging in, without detecting the receiving end first and then supplying power
Notes
1. Use distance: It is related to the quality of the network cable, the power supply voltage, and the voltage adaptability of the powered device.
2. Generally speaking, the distance is 10-30 meters for pure copper network cables and a 12V power supply.
3. The higher the voltage, the better the network cable quality and the longer the effective power supply distance.
4. Because the general network only uses 1236 to transmit DATA (network data), and 4578 is idle, so many merchants who produce network cables mostly have 4 iron wires and not pure copper wires when producing network cables. Such wires are used in the POE power supply. This will result in a large supply voltage drop.
5. the network cable is very thin and has uneven quality, and some are iron wire, and copper-clad aluminum wire, the resistance of the network cable is very high, and the loss is very serious. Actual test results: When the general network cable is 12V, it will drop by about one V for 10 meters. So the voltage is about 12V and the distance is within 20 meters
How to distinguish the quality of network cables:
1. Check the material from the outer skin: Use your hand to touch the outer skin of the network cable. If it is soft and seems a little hollow, it is of poor quality. The better ones feel fuller.
2. Determine the tension of the network cable: If the outer skin is very elastic, it is not very good. If you pull the cable hard, it is easy to cause the inner core to break.
3. Go deep into the copper core to see the composition: Use scissors or network cable pliers to cut a small section of the network cable and take a look.
4. If the outer core of the network cable is copper, but the inner core is a silver-white steel core, it is relatively poor. If the inside and outside are all yellow copper, it is relatively good.
5. In addition, you also need to look at the thickness of the copper core. Some use less material and the copper core is relatively thin, while others are relatively thick.
6. For Category 5e network cables, just look at the above points. Category 6 and Category 7 also have shielding functions, so you also need to look at the shielding layer in the network cable. Some of them wrap all 8 network cables in an outer sheath, while others wrap each pair of network cables with a shielding layer. This is the difference.
