2 x PoE Devices, One Cable With a RJ45 Splitter

theboyrob · 4 Mar 2014 at 15:12

We have a long run of Cat5e from a PoE switch at one end to an IP camera at the other.

The customer wants to add another camera next to the existing one so my question is would the following setup work:

PoE Switch ---------Cat 5e---------> RJ45 Splitter----> 2 x IP Cameras

The PoE switch supports up to 53w, each camera draws 5w. With the above setup he'd have a total of 5 cameras, therefore 25w.

Any thoughts?

bremen1874 · 4 Mar 2014 at 15:31

What sort of PoE?

If you're going to try and use splitters they'll need to used at both ends of the cable.

theboyrob · 4 Mar 2014 at 15:32

A TP Link 8 Port PoE Switch

bremen1874 · 4 Mar 2014 at 15:37

There are PoE standards (e.g. 802.3af), and also different modes for the power (phantom vs spare pairs). There are also non-standard implementations.

You need to know what you're using.

theboyrob · 4 Mar 2014 at 15:42

erm... god knows!

The switch:

http://uk.tp-link.com/products/details/?model=TL-SF1008P

The cameras:

http://www.cctvempire.co.uk/AMB-EYE-2MP

bledd · 4 Mar 2014 at 15:46

I'd go with no

Caged · 4 Mar 2014 at 15:47

Your customer needs to pay someone to run a second cable.

theboyrob · 4 Mar 2014 at 15:48

Yes I agree, thanks for the backup. I'll put it to him as the only option as its going to more reliable that way.

bremen1874 · 4 Mar 2014 at 15:59

That PoE switch appears to only support 802.3af mode B (it uses the spare pairs for power). To have any chance you'd need injectors that support mode A (phantom power).

As already mentioned it makes more sense to run another cable.

ci_newman · 5 Mar 2014 at 10:40

The majority of cheaper PoE requires all 4 pairs of copper within the Cat5e cable, therefore a splitter will not give you sufficient pairs to carry both power and data to two cameras.