Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


steve98

1332 posts

Uber Geek

Trusted

#288841 27-Jul-2021 12:08
Send private message

I currently have a Unifi AC Lite which came with a POE Injector

 

Would that same POE Injector power a AC Pro? If not, would this work (or can you point me to something that would)? https://www.pbtech.co.nz/product/NETUBI91105/Ubiquiti-U-POE-af-Passive-PoE-Injector-Only-work-w 

 

Cheers!

 

 


Create new topic
Affiliate link
 
 
 

Affiliate link: Norton 360 antivirus provides enhanced security for your connected devices, a secure VPN for online privacy, Password Manager, Firewall, SafeCam, PC Cloud Backup, Dark Web Monitoring, Parental Control, and more. An all-in-one cybersecurity solution backed by 100% Virus Protection Promise and 60 Day Money Back Guarantee.
OzoneNZ
101 posts

Master Geek


  #2750588 27-Jul-2021 12:35
Send private message

Pretty certain that UAP-AC-PRO models are all 48V 802.3af (active) PoE

 

 

 

Earlier UAP-AC-LITE models only came with 24V passive injectors so you should check the box of your UAP-AC-LITE to see if it lists support for 802.3af.

 

I'd be very careful to confirm that your existing injector from the UAP-AC-LITE is not one of the 24V passive ones before trying to use it on your UAP-AC-PRO, because the UAP-AC-PRO doesn't list 24V passive support as far as I can see

 

 

 

From the UBNT website:

 

> "UAP-AC-LITEs with a date code prior of 1634 or board revision before 33 only support 24V passive PoE."

 

 

 

EDIT: that injector you linked is super weird, it lists itself as 802.3af compliant but says it is passive-only so it always supplies 48V without the device needing to request power

 

I'd avoid it and get a proper active 802.3af injector

 

 

 

Here's a sad story from someone who bought one of those non-compliant 802.3af injectors and fried their hardware 

 

https://www.reddit.com/r/Ubiquiti/comments/o7kjxj/the_upoeaf_doesnt_support_8023af_its_an_passive/


steve98

1332 posts

Uber Geek

Trusted

  #2750651 27-Jul-2021 13:11
Send private message

OzoneNZ:

 

Pretty certain that UAP-AC-PRO models are all 48V 802.3af (active) PoE

 

 

 

Earlier UAP-AC-LITE models only came with 24V passive injectors so you should check the box of your UAP-AC-LITE to see if it lists support for 802.3af.

 

I'd be very careful to confirm that your existing injector from the UAP-AC-LITE is not one of the 24V passive ones before trying to use it on your UAP-AC-PRO, because the UAP-AC-PRO doesn't list 24V passive support as far as I can see

 

 

 

From the UBNT website:

 

> "UAP-AC-LITEs with a date code prior of 1634 or board revision before 33 only support 24V passive PoE."

 

 

 

EDIT: that injector you linked is super weird, it lists itself as 802.3af compliant but says it is passive-only so it always supplies 48V without the device needing to request power

 

I'd avoid it and get a proper active 802.3af injector

 

 

 

Here's a sad story from someone who bought one of those non-compliant 802.3af injectors and fried their hardware 

 

https://www.reddit.com/r/Ubiquiti/comments/o7kjxj/the_upoeaf_doesnt_support_8023af_its_an_passive/

 

 

 

 

OK thanks. Have checked the box for the AC-Lite and it says "Supports Gigabit 24V and 802.3af/A PoE" and says that the injector in the box is "Gigabit PoE Adapter (24V, 0.5A)" --- so do you think it would power the AC-Pro? Sorry, I find this part of it a bit confusing.


sbiddle
30853 posts

Uber Geek

Retired Mod
Trusted
Biddle Corp
Lifetime subscriber

  #2750672 27-Jul-2021 13:18
Send private message

UniFi hardware falls into 4 different categories - products powered by 24V passive POE, products powered by 48V passive PoE, products powered  by 24V passive PoE + 48V 802.3af and products powered by 48V passive PoE and 48v 802.3af

 

The UniFi AC Lite comes with a 24V passive PoE adapter. Depending on the age of the AP this can also be powered by a 802.3af power supply (first year or so of this product was 24V only, subsequent versions support both).

 

The UniFi AC Pro is a 48V passive PoE / 48V 802.3af compatible device. It cannot be powered by the 24V AC lite power adapter, but will work with the 48V or 802.3af adapter

 

Without checking that PB Tech part number I can't guarantee that is the correct model (UBNT make multiple 48V adapters, some which will not work) but I'm pretty sure it's the correct one.

 

 




OzoneNZ
101 posts

Master Geek


  #2750675 27-Jul-2021 13:26
Send private message

I don't blame you, PoE is a fragmented mess and Ubiquiti hasn't done anything to simplify it by releasing non-compliant injectors haha

 

Sounds like you have a 24V passive PoE injector even though your UAP-AC-LITE supports 802.3af active PoE, so unfortunately I don't think it will work with your UAP-AC-PRO

 

 

 

I think this should do the job nicely but I'll wait for someone else on here to sanity-check my choice:

 

https://www.pbtech.co.nz/product/NETTPL0150/TP-Link-TL-POE150S-Gigabit-PoE-Injector-8023af--15

 

 

 

For future reference the most common types of PoE hardware you'll find today are:

 

- 24V passive PoE

 

- 48V passive PoE

 

- 802.3af (48V active, up to 15.4 Watts)

 

- 802.3at (48V active, up to 30 Watts)

 

 

 

Stay away from passive PoE when possible, it's an old spec that has lead to countless people frying their hardware because it constantly supplies power even when not requested by the connected device.

 

Active PoE requires the connected device to actually negotiate how much power it requires before any is supplied, so it's much safer.


Create new topic





News and reviews »

D-Link G415 4G Smart Router Review
Posted 27-Jun-2022 17:24


New Zealand Video Game Sales Reaches $540 Million
Posted 26-Jun-2022 14:49


Github Copilot Generally Available to All Developers
Posted 26-Jun-2022 14:37


Logitech G Introduces the New Astro A10 Headset
Posted 26-Jun-2022 14:20


Fitbit introduces Sleep Profiles
Posted 26-Jun-2022 14:11


Synology Introduces FlashStation FS3410
Posted 26-Jun-2022 14:04


Intel Arc A380 Graphics First Available in China
Posted 15-Jun-2022 17:08


JBL Introduces PartyBox Encore Essential Speaker
Posted 15-Jun-2022 17:05


New TVNZ+ streaming brand launches
Posted 13-Jun-2022 08:35


Chromecast With Google TV Review
Posted 10-Jun-2022 17:10


Xbox Gaming on Your Samsung Smart TV No Console Required
Posted 10-Jun-2022 00:01


Xbox Cloud Gaming Now Available in New Zealand
Posted 10-Jun-2022 00:01


HP Envy Inspire 7900e Review
Posted 9-Jun-2022 20:31


Philips Hue Starter Kit Review
Posted 4-Jun-2022 11:10


Sony Expands Its Wireless Speaker X-series Range
Posted 4-Jun-2022 10:25









Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.