Yeah, when we talk 4-pair power, it's two pairs positive and two pairs
negative. Each pair carrying 1A. So it is effectively 2A total on the
port, or as Forrest said, 96W @ 48VDC. With a 2-pair power (one +, one
-) radio, all you'd be able to get to it is 48 watts.
In the case of Trango's crazy POE scheme, assuming worst case of about
80 watts, you have ~200ma on each conductor. Ignoring minute differences
anyway. But the return path (aka shield & drain) is carrying all 1.67A
of return current. Which is the least of my concerns with decent cable.
On 11/14/2016 2:11 PM, Bill Prince wrote:
Each pair is one half of a power circuit. So there are 4 halves. There
are two issues; how much current can each wire carry, and how much
current can each connector pin can carry.
bp
<part15sbs{at}gmail{dot}com>
On 11/14/2016 11:59 AM, Josh Luthman wrote:
There are four pairs. AF5x and the H in 24vh or 48vh POE ports of
Netonix do power over all four pairs. Speaking with Ubnt support last
week, AF5x should ideally do four pairs when possible.
48v (0.75*4a) = 144 watts
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Mon, Nov 14, 2016 at 2:44 PM, Bill Prince <[email protected]
<mailto:[email protected]>> wrote:
At 48 volts, and .75 amps per pair of power wires, that would be
36 watts + 36 watts, or 72 watts total?
Just noodling here.
bp
<part15sbs{at}gmail{dot}com>
On 11/14/2016 11:38 AM, George Skorup wrote:
For the record,
http://store.packetflux.com/powerinjector-plus-sync-gigabit-version/
<http://store.packetflux.com/powerinjector-plus-sync-gigabit-version/>
says: 1A per port maximum power. (48 watts at 48 Volts)
So.. is the electronic over-current protection the 1A limit? Or
is this just outdated info? Pretty sure it's >1A because I've
"tested" it (cable leaking water into the GigE-APC, the port
didn't trip, and the card was hot as hell).
I was also unaware that Cambium won't be supporting
sync-over-power on the 450m. I imagine the ringing/bounce issue
killed that idea due to the high power consumption.
On 11/14/2016 1:00 PM, Forrest Christian (List Account) wrote:
The current products should power the 450M just fine. The
rating is 1A per pair per port, so at the 48V you're good up to
96W.
On Nov 14, 2016 7:50 PM, "George Skorup" <[email protected]
<mailto:[email protected]>> wrote:
The 450m pulls 70 watts. The current
SyncInjector/PowerInjector+Sync is around 1A max per port.
What you could do for now is a GigE-POE-APC and the new aux
port version SyncBox Junior.
On 11/14/2016 12:34 PM, Matt wrote:
Shouldn't the sync over power for the 450M be the same
as PMP450i?
How is the 1u sync injector coming?
On Mon, Nov 14, 2016 at 12:30 PM, Forrest Christian
(List Account)
<[email protected] <mailto:[email protected]>> wrote:
All of the currently shipping syncbox product line
are compatible. For sync
over power, I have the specs, but the design isn't
done yet.
On Nov 14, 2016 5:40 PM, "Sam Lambie"
<[email protected]
<mailto:[email protected]>> wrote:
A question for Forrest mostly. Have you come up
with a timing product for
the 450m AP yet? If not, have you got a
timeline for release?
Sam
--
--
Sam Lambie
Taosnet Wireless Tech.
575-758-7598 <tel:575-758-7598> Office
www.Taosnet.com <http://www.Taosnet.com>
