Page 1 of 1

RB750 no POE  [SOLVED]

Posted: Tue Sep 17, 2024 8:24 pm
by mworsnop
I have one camera in my testing environment. I have a active Poe injector. The camera plugged into the Poe injector works great.

I then put the RB750UPr2 hEX PoE lite into the mix. The cable coming from the Poe injector I put into the first port POE in. The RB 750 powers on and is functioning as I can connect to it. I put the camera into ether 2. In winbox I went to the interfaces for ether 2 and enabled the Poe on all the time. However the camera does not work. I can plug an external power source to the camera and everything works properly.

Something in the RB750 is stopping the POE power from getting to the camera properly. I really don't know what else to check.

Any ideas?

Re: RB750 no POE

Posted: Tue Sep 17, 2024 8:42 pm
by Kanta
You used PoE Out: forced on on ether2?

What is the PoE Out Status? It's on the same tab under the poe settings

Re: RB750 no POE

Posted: Tue Sep 17, 2024 11:35 pm
by mworsnop
I had left it at auto on originally. Then I tried forced on. That didn't make any difference.

Here is a screen shot. The info under the POE status seems to be the same even if the camera isnt plugged in

Re: RB750 no POE

Posted: Wed Sep 18, 2024 12:09 am
by mworsnop
I think I need a different injector for the power. It powers the RB750 ok. But not the camera.

I will order a different injector I guess. I have a passive injector that powers the RB750 but doesn't get to the camera. The other one I have is 802.3/af/at but it does not seem to work either.

Using the active POE injector I put the setting back to auto on. Now the status says waiting for load.

If the active POE injector works the camera ok but the Mikrotik RB750 does something with the POE, maybe I need a different switch?

Re: RB750 no POE

Posted: Wed Sep 18, 2024 1:07 am
by jaclaz
Which camera?
Most cameras are either non-PoE (and need a splitter/converter) or 802.3af.
To extremely simplify, 802.3af means 48V.
That Hex PoE lite is passive PoE, which - again extremely simplified - means 24V.
They talk very different languages.
The power adapter coming with the Hex is 24V 2.5A, and from your screenshot It provides 23.8V out on ether2.
If the camera is 802.3af, It needs 48V (that you cannot give to the Hex, which is 30V max).
Usually such cameras have another power in via jack socket, either 12V or 24V, and splitter/converters can be used to extract the power from the ethernet cable to a jack plug (and if needed convert It from 24 to 12V)

Re: RB750 no POE

Posted: Wed Sep 18, 2024 1:58 am
by mworsnop
The camera works with a 12 V plug directly at the camera. It also works if I plug it into the 24 V - 802.3/af/at power supply via POE.

I was hoping to have all Mikrotik equipment but Im going to get a different brand that handles the POE cameras well.

Oh well.

Thank you everyone for your input.

Re: RB750 no POE

Posted: Wed Sep 18, 2024 2:39 am
by jaclaz