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.
