Hi guys, Just updated the KB article to include more information about power input options for airFiber radios: https://help.ubnt.com/hc/en-us/articles/215999457?flash_digest=39fe6fbf92d2e372f6764eb4ac73ac471636e8d5
On Thu, Jun 29, 2017 at 1:42 PM Kristian Hoffmann <[email protected]> wrote: > Perfect. Thanks Alex. > > > -Kristian > > > On 06/28/2017 05:19 PM, Alex Pavlos via Ubnt_users wrote: > > The AF-24 and AF-24HD *WILL* support -48VDC since its supply is > isolated. AF-5(*not X* the large full duplex radio) also will support > -48VDC. > > *AF-5X, AF-4X, AF-3X, AF-2X and AF-11FX WILL NOT ACCEPT -48VDC (positive > on Earth/chassis/tower ground) AT ALL! If an “X” radio has been powered by > -48VDC with respect to case (tower ground) it will surely be damaged!* > > Regards, > Alex > > On Jun 28, 2017, at 6:30 PM, Kristian Hoffmann <[email protected]> > wrote: > > Can someone from Ubnt answer this question? I'm getting yes, no, and > maybe in even numbers. To complicate matters, I did actually power one up > with -48V and it didn't explode. And that wasn't on a bench, isolated from > ground. That's on a metal tower with other -48V non-isolated radios. > > Thanks, > > -Kristian > > On 06/27/2017 11:47 AM, Kristian Hoffmann wrote: > > I'm reading that as "yes, you can power it with -48VDC." > > Thanks, > > -Kristian > > On 06/27/2017 11:00 AM, [email protected] wrote: > > Input 48v is transformer isolated, individual on-board voltage converters > have DC negative directly coupled to chassis ground. > > AF24 reads 0 ohms from board DC- (also digital ground) to chassis > plate, “no” path between input DC- and chassis plate. > > 24HD shares the same PCB, so the same applies for that. > > *From:* Kristian Hoffmann <[email protected]> > *Sent:* Tuesday, June 27, 2017 1:52 PM > *To:* Ubiquiti Users Group <[email protected]> > > Hi, > > Is the AF24's internal power supply isolated in such a way that it can > be powered with -48VDC, like other telco equipment with a positive > ground, or will this cause a short when mixed with other -48VDC > equipment on the same ground plane? > > Thanks, > > -- > Kristian Hoffmann > Fire2Wire > [email protected] > http://www.fire2wire.com > > Office - 209-543-1800 | Fax - 209-545-1469 | Toll Free - 800-905-FIRE > > _______________________________________________ > Ubnt_users mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/ubnt_users > > > _______________________________________________ > Ubnt_users mailing > [email protected]http://lists.wispa.org/mailman/listinfo/ubnt_users > > > > > _______________________________________________ > Ubnt_users mailing > [email protected]http://lists.wispa.org/mailman/listinfo/ubnt_users > > > _______________________________________________ > Ubnt_users mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/ubnt_users > > > > _______________________________________________ > Ubnt_users mailing > [email protected]http://lists.wispa.org/mailman/listinfo/ubnt_users > > > _______________________________________________ > Ubnt_users mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/ubnt_users >
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