Thanks Alex! Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373
On Jun 28, 2017 8:20 PM, "Alex Pavlos via Ubnt_users" <[email protected]> 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 <(209)%20543-1800> | Fax - 209-545-1469 <(209)%20545-1469> | 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 list [email protected] http://lists.wispa.org/mailman/listinfo/ubnt_users
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