I looked it up, you are correct that everything you listed is +48v. The
CCR uses a bullet connector so there is no ground from the power source
but since it can also be powered via PoE, I expect it to be +48.
The site has a Dragon Wave and that old Cambium radio that are both
-48v. Oh the joys of moving away from AC power bricks to straight DC.
Gilbert
On 8/19/2016 1:16 PM, George Skorup wrote:
AF5 and 24's. Virtually any 802.3af or at device. Multiple MikroTik
products. Other UBNT stuff. I'm sure there's more.
On 8/19/2016 11:11 AM, Gilbert T. Gutierrez, Jr. wrote:
I believe both my Netonix Switch and Mikrotik CCR both are +48v.
Gilbert
On 8/19/2016 7:06 AM, Chuck McCown wrote:
Curious, what types of things use +48?
-----Original Message----- From: Gilbert T. Gutierrez, Jr.
Sent: Thursday, August 18, 2016 7:19 PM
To: af@afmug.com
Subject: [AFMUG] 48v and -48v
I have a site that I am converting to DC from AC. All of the gear
powers
at traditional 48v with a negative ground. I have a PTP800 though
that I
am told is -48v (ground tied to positive). How do I get -48v for the
PTP800?
The site has a NewMar DIN-UPS 48-10. It states that the outputs are
isolated (it has 2) but I do not think they are isolated from each
other, just from ground. To tell you the truth I am lost. I was
thinking
maybe a DC to DC converter of some sort.
Thank you,
Gilbert