POE issue with TP-link Switch and Ubiquiti Rocket 5AC Lite

Mason64 · 1 May 2022 at 21:35

Hey All

I have got 3 x Rocket 5ac lite running on POE injectors but i am going to swap them out for a TP-Link-TL-SG1016PE (first 8 ports are POE)

I have checked and the rocket 5AC lites need 24c .5amp to run and take about 8 to 10w, the switch takes a load of 130w which would be fine for 3 rocket 5ac.

the cable runs are properly under 50m each run. They work perfect on the POE 24v injectors but i cant seem to get them powered with this switch.

I tested the switch on a Unifi ac lite and it powered it fine. that uses the same 24v injectors - i just cant seem to see why the switch wont power them (tried with just 1 rocket lites but no luck)

Any ideas?

Thanks
dave

Steveocee · 2 May 2022 at 00:16

The rocket's use a 24v poe by design as they are destined for outdoor and WISP usage so lower power is better.
I can't quite explain the AC Lite however I know my old AC-LR was specced either 24v or 48v input as they are more enterprise spec.

You're kind of going between the lines. Have you looked at something like a CRS112-8P switch? will be a bit more but should give the PoE switching you want.

Mason64 · 2 May 2022 at 06:58

Hey Steveocee

Thanks for the quick reply and help.

Rockets do use 24v POE by design but i cant get my head around why the switch wont power the rockets as they power other poe devices.

I have already have the TP link switch but will have another at the CRS112-8p thanks
dave

Mason64 · 2 May 2022 at 07:23

Not sure if i have answered my own question but is it because the switch i have purchased does not support passive poe and the rockets need passive poe?

Its not very clear at all but want to make sure before i order another switch like the CRS112-8P and being down another £200 odd

thanks
dave

the-evaluator · 2 May 2022 at 09:43

Mason64 said:
Not sure if i have answered my own question but is it because the switch i have purchased does not support passive poe and the rockets need passive poe?

Pretty much, but you need to consider voltage too. The Rockets will want 24v passive PoE and your switch is an 802.3af switch so it's outputting 48v. There's a few different standards for PoE.

If you want to power a 24v passive PoE device from an 802.3af switch port then look at getting an INS-3AF-I-G for each Rocket. They'll take in 802.3af from the switch and output 24v to the Rocket.