Yes
-----Original Message-----
From: Robert
Sent: Friday, May 19, 2017 7:12 PM
To: [email protected]
Subject: Re: [AFMUG] Netonix POE
Are you using the Mini.... All bets off..
On 5/19/17 4:09 PM, Chuck McCown wrote:
When I put in 55 I get out 55.
*From:* Rory Conaway
*Sent:* Friday, May 19, 2017 5:08 PM
*To:* [email protected]
*Subject:* Re: [AFMUG] Netonix POE
They can take 9-72V and put out 24 or 48V.
Rory
*From:*Af [mailto:[email protected]] *On Behalf Of *Chuck McCown
*Sent:* Friday, May 19, 2017 4:04 PM
*To:* [email protected]
*Subject:* Re: [AFMUG] Netonix POE
I don’t think Netonix had a DC-DC, it just puts out what it is fed.
*From:*George Skorup
*Sent:*Friday, May 19, 2017 4:33 PM
*To:*[email protected]
*Subject:*Re: [AFMUG] Netonix POE
Remember that Forrest's SyncInjector/PowerInjector/RackInjector products
allow 2A per port. But maybe it doesn't matter because of the built-in
current protection?
Also consider that something like a Medusa could be running on battery
power for >30 minutes. Say 75W @ 44VDC = ~1.71A worst case. I say 75W
due to variables (cable length, etc). It's fine if your supply is always
56VDC. I use a lot of Traco BCMU360s which are regulated 48VDC, which
then becomes ~1.57A. Well, it dips down to about 46 volts or so when the
battery is getting low. I'm sure there are/will be folks wanting to run
a 450m on a Netonix. Maybe it doesn't matter because the Netonix
internal DC-DC always puts out 54VDC, doesn't it? I don't know.
On 5/19/2017 5:01 PM, [email protected] wrote:
I made a circuit board that fits into the APC rack.� It is an
Ethernet fuse board.�� Kinda a belt and suspenders for maximum
protection of an CAT5/6 circuit.� If a surge suppressor clamps
during a major event, this fuse board will blow to prevent damage to
a POE supply.� Have LEDS on 4 of the 8 pins to detect blown fuses
if it is a POE circuit.�
�
Been tweaking the fuse values for about a month.� Did the first
run of the pre-production part and started testing.� I tweaked the
fuses to blow about a bit over 2 amps.�
�
Started doing some long term burn in runs to check thermal
considerations etc.� Had the load dialed in to 2 amps.� Powered
by a Netonics doing 54 volts.�
�
It ran for about a half hour before blowing the Netonix port.�
They say 2 amps surge, 1.5 amps continuous.� I think they
_actually mean it_.� I was hoping it would survive 2 amps
continuous, but it will not.� So I have a roll of smt fuses that
are worth about $650 that I will not be using unless I release a 1.5
amp and a 2 amp version of this product.�
�
RJ45 pins are rated at a half amp each so 2 amps per jack.� 2 amps
would be a good generic value.� Not sure whether to offer two
different amp ratings or one.�
