Is hEX PoE capable to power up hAP ac2 via PoE In?

jonsbun · February 3, 2021, 11:57am

Hello,

I want to update my home network. Idea is to use hEX PoE as AP controller and power source for two hAP ac² devices.

However, according to hEX PoE specifications, I am not sure my mentioned configuration is valid?

bpwl · February 3, 2021, 12:16pm

hEX PoE with 24V adaptor 2.5 A

MAX output per port: 1A
MAX output : 2A

hAP ac2 with 24V adaptor 0.8 A or PoE.
MAX power =21W (16W without USB) = 0.875A (0.66A without USB)
I see here 3.5W = 150mA with idle hAP ac2 via PoE (from RB260GSP with 24V adaptor)

So your setup is valid.

jonsbun · February 3, 2021, 12:34pm

Thanks for the answer. However, the situation still looks a little bit unclear for me.

hEX PoE power out interfaces are based on 802.3af/at, while hAP ac2 is Passive PoE and has PoE in input voltage 18-28 V.
According to hEX PoE description, it can power at/af mode B (4,5+)(7, compatible devices, if 48-57 input voltage is used.
If I am right, looks like I cannot powering hAP ac2 from hEX PoE directly?

quackyo · February 3, 2021, 12:39pm

From https://mikrotik.com/product/RB960PGS
“It also supports passive PoE input and passive or 802.3af/at PoE output.”

Your setup is valid and should work fine.

mkx · February 3, 2021, 3:06pm

AFAIK all MT devices can do passive PoE (either IN or OUT if they are PoEout) even if quick specs say 802.3 af/at. OTOH MT devices won’t do voltage conversion for PoE out. If they are powered with voltage outside normal 802.3 af/at range (44-57V), they’ll provide PoE out without 802.3 af/at negotiation with same voltage as on input. So, if you’re going to power your hEX PoE with 24V adapter, its PoE out won’t be 802.3 af/at.

birdsky · February 3, 2021, 10:54pm

Yes. hex POE can power hap ac2. I use that setup everyday. My setup uses 4W from hex POE to power hap ac2.

Elans · February 5, 2021, 7:33am

Hello,

To sum up:
All MikroTik devices which provide compatibility with 802.3 af/at standard also support Passive PoE. Most of 1-4 poe-out port devices do not have any onboard voltage converter - they can power other PoE capable devices with the same voltage as applied to the unit (e.g. if you power the device with 24V PSU, then you will get “.. > 24V” on poe-out port (depends on cable quality, length etc.)). If you need to power 802.3 af/at device from, as example, HeX PoE, then you will need at least 48V PSU.

Please note that there are power output limits, see detailed description in device specification.
If you have any questions regarding PoE capabilities, you can always write to support@mikrotik.com