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]
<mailto:[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 <mailto:[email protected]>
*Sent:* Tuesday, June 27, 2017 1:52 PM
*To:* Ubiquiti Users Group <mailto:[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 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
_______________________________________________
Ubnt_users mailing list
[email protected] <mailto:[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
