Power cable net with PoE or Power Over Ethernet
PoE or Power Over Ethernet is a technology through which we can carry electricity through the net cables for powering devices like: surveillance cameras, Wireless access points, phones VoIP and more. The technology is relatively young, but in the future it may be the basis for connecting devices directly to each other, in the great network called the "Internet of Things".
Why is good PoE?
Any device that connects to the network requires data connection and power supply. PoE or Power Over Ethernet and data help us and to transport electricity over a single cable at the net.
How can I use PoE?
First, we need PoE receivers, such as: surveillance cameras, Wireless APs, etc.
If you have capable devices PoE, PoE injectors automatically we need that will put current through wires. These can be switches
PoE deployment types.
PoE 802.3af - with a maximum power of 15W per port
PoE 802.3at (PoE Max) - with a maximum power of 30W per port
It should be noted that any PoE device PoE going on at instead af PoE only works on devices with maximum consumption 15W.
Port PoE devices in normal?
There is no problem, non PoE devices can connect to the ports of PoE switch. If you switch a PoE device feels a cable, current will not start on that port.
On PoE go the distance?
Cable Quality (CAT5e and over) can achieve and 100 meters, provided that the device does not consume much energy. With current through wires, amps and losses are proportional distance.
Solution cameras and APs with PoE support.
If your device does not support PoE, PoE can use a kit consisting of two parts, an injector and a splitter. Splitter will be installed next to the camera; it will take over from current injection and data via a single UTP cable, then will break up and flow data, which will connect the camera. Although this solution is not the most elegant works!
Power cable net with PoE or Power Over Ethernet
- video tutorial
View Comments (11)
at this network-powered camera it doesn't matter how much power the modem provider gives etc? like if he gives less than the room asks?
The camera draws as needed, and voltage and amperage. The injector can provide up to 48 volts and amps request provided they do not exceed 15W on af PoE and PoE at 30W on. For example a room at 12V, can shoot up to 2.5 amps. One of 5V can shoot 6 amps.
Hi Cristi, do all POE surveillance cameras get as much voltage as they need? I have a POE Aevision camera, it also works on POE at 12 V but I didn't have the courage to insert a 48 V POE injector, consequently I chose the splitter cable method, what do you say, I can try to connect it directly to the injector ? Thank you !
Bag it carelessly. If af PoE compliant injector or at, you have no problem. The injector has a maximum 48V and the camera pulls as needed.
Cornel @
The two are not related to each other, one is the signal and the other is voltage.
Hello
What model is room in the tutorial?
Dahua SD3282D-GNPTZ exterior.
Hello. I studied a bit about an Annke NVR system with 8 complete poe cameras including cat5 cables
I bought cables separately and for longer distances and outdoor use in frost and sun, the cables that came with the system were extremely thin and the outer shell already seemed brittle.
Everything is ok so far. Care should be taken that although theoretically comply with ONVIF standard rooms do not meet all the producers and the POE.
As NVR system I recommend Annke
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good quality cable matter? ie I have seen it 7 I have one quality cables Belkin
This tutorial is very interesting and very helpful. I really want to install surveillance cameras and I have problems with the power supply because the electrical installation is a bit long ago and I did not provide power for those surveillance cameras. With this tutorial I largely solved the problem.
Thanks a lot for the tutorial.