PoE splitter/extender/injector to supply with 5V and pass-through data and PoE

[ViliusM]

Hi has anyone know a cheap solution how to power a device with 5V or 3.3V (approx. 2-3 Watts) and pass-through data and PoE to the IP camera. Please see scheme attached. Answers would be much appreciated.

Thank you.

Sincerely,
Vilius

 

[FreddyNurk]

The most obvious solution is to upgrade the switch so it supports PoE, although that won't give you the +5V, which I'm assuming you need for the device indicated. Ubiquiti has PoE injectors capable of providing the function of a PoE switch, but still won't get you the +5V, although they don't require you replacing the whole switch.

Probably not that helpful, but Raspberry Pi is developing an add on board that will do what you're after, but its obviously designed for integration with the Raspberry Pi, and its not released to market yet. PoE is, as far as I'm aware, 48V, so its not so likely that you'll find a device that drops it to 5V for connection to an external device, particularly when you already need to connect ethernet to the device anyway. Having said that, there might well be other devices like the Pi unit.

EDMS Australia

 

[JG2828]

How many PoE ports do you need? This Gigabit switch has 5 ports, 4 are active PoE ports for under $50.

https://www.amazon.com/TP-Link-TL-SG1005P-Gigabit-Ethernet-Desktop/dp/B076HZFY3F

If your cameras support passive PoE you could go with an injector like this one, power supply not included:

https://www.amazon.com/WS-POE-8-ENC-Injector-Ethernet-INCLUDED-External/dp/B0075F7F2O/

By the way, PoE is supposed to be 44v to 57v dc. Don't attempt to feed any other voltage directly into the RJ45 PoE port of a device.

If you are not really using it for the PoE standard you could use something like this. You could inject any voltage you want at one end and remove it at the other end. Again, you will need to provide a separate power supply.

https://www.cctvcamerapros.com/ProductDetails.asp?ProductCode=POE-PA2

 

[ViliusM]

Hmmm... Maybe you have any suggestions how to power up the Device in scheme while passing-through data and power to the IP camera?

Thanks

 

[FreddyNurk]

What's the device?
How far away is it from the Camera?
Does it also use ethernet, or are you just attempting to use the PoE as a pseudo power supply because its near the camera? I'm assuming the camera is PoE compatible?

EDMS Australia

 

[JG2828]

If you provide the model number of the camera we could probably give you a good idea of what you need.
With standard 10/100mbit ethernet POE, the DC is sent over the 2 unused pairs in the cat5 cat6 cable. Gigabit ethernet requires all 4 pairs and a different scheme is required for PoE. Gigabit PoE devices are harder to find and cost much more.

Image from

https://en.wikipedia.org/wiki/Power_over_Ethernet

 

[ViliusM]

The device is on PoE compatible camera. Please see attached. Thanks.

 

[JG2828]

Can you provide the model number or a link to the camera? The image you supplied doesn't give any details on what voltage needs to be supplied to the "Mounted device", whatever that is.

 

[ViliusM]

Device needs 5V or 3.3V to power up.

Thank you.