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Registered: ‎11-23-2018

Which PoE injector for UAP-AC-LR

I have read various threads on this, but struggling to find a definitive answer...

 

I noticed the other day that I have a UAP-AC-LR which is only connected at 100Mbs on the uplink...further investigation shows that the PoE in use is GP-A240-050 which is only good for 100Mbs, however the UAP-AC-LR can handle a 1000Mbs uplink with a 450Mbs 2.4GHz radio rate (correct me if i'm wrong!)

 

Now the tricky part is finding a Gigabit injector suitable for the UAP-AC-LR...I have 2 - GP-D480-050G and UBI-POE-48-5G but I don't know if the AP is an "early" model only supporting 24V passive or if it's a newer one (I didn't provide the AP) so i'm unsure if these are likely to fry the AP?

 

Can anyone shed any light/assistance? Thanks in advance..

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Re: Which PoE injector for UAP-AC-LR

[ Edited ]

Hello @joeski,

 

Welcome to the community!

 

What are the first 5 numbers/letter of your MAC ID? ( You can find that on the back of the unit. )

 

If you want to be save use a 24V PoE Injector.

 

 

Regards,

Glenn R.

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Re: Which PoE injector for UAP-AC-LR

It doesnt matter if it is the old (24v only one) or the new (802.3af capable version) the injector that comes with they Lite/LR/Mesh is 24v Gigabit version.

 

https://www.ubnt.com/downloads/datasheets/unifi/UniFi_AC_APs_DS.pdf

 

UAP-AC-LR
Dimensions 175.7 x 175.7 x 43.2 mm (6.92 x 6.92 x 1.70")
Weight
With Mounting Kits
240 g (8.5 oz)
315 g (11.1 oz)
Networking Interface (1) 10/100/1000 Ethernet Port
Buttons Reset
Power Method 802.3af/A PoE
24V Passive PoE (Pairs 4, 5+; 7, 8 Return)
Power Supply 24V, 0.5A Gigabit PoE Adapter*
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Re: Which PoE injector for UAP-AC-LR

Here is the PoE Injector Datasheet - https://dl.ubnt.com/datasheets/poe/PoE_Adapters_DS.pdf

 

Per the document all 2 pair injectors (24v and 48v) output on Pairs 4, 5+; 7, 8 Return so the 48v injectors you have would likely kill the AP (I wouldn't try it with my stuff) as the LR is expecting 24v on those pairs.

New Member
Posts: 3
Registered: ‎11-23-2018

Re: Which PoE injector for UAP-AC-LR

[ Edited ]

Thanks for the prompt replies and welcome!

 

I don't think the injector supplied was one which came with the AP (it's all a bit of a mess which i'm trying to untangle) and i'm completely new to Ubiquiti equipment so this is a bit of a learning curve for me....soo many injectors!

 

Going on your comments and that datasheet it's simply a case of ordering a POE-24-12W-G which supplies 24V on the same pairs

 

Thanks again

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Re: Which PoE injector for UAP-AC-LR

Hello @joeski,

 

You can see the model of the PoE Injector on the back of the unit ( under the montage bracket )

 

 

Regards,

Glenn R.

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Registered: ‎11-23-2018

Re: Which PoE injector for UAP-AC-LR

Hi Glenn,

 

Thanks for that, i'm 99% sure it's a POE-24-12W but it's in a remote site (around 1.5hrs away) and fairly inaccessible (above a false ceiling) where the site contacts are far from being technically minded....you can see my predicament!

 

So to avoid further unnecessary site visits i'm hoping to get the injector ordered and installed all in one go.

 

I've ordered a POE-24-12W-G-WH....hope that will do the trick!

 

Thanks again for your help, I quite like what i've seen so far of the Ubiquiti kit so hopefully be making a nuisance of myself on these forums in the future Man Happy

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Re: Which PoE injector for UAP-AC-LR

Hello @joeski,

 

Goodluck, please keep us posted!

 

 

Regards,

Glenn R.

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