It might be doing that. I will check when I get back to the lab. From: Josh Baird Sent: Friday, May 19, 2017 5:43 PM To: [email protected] Subject: Re: [AFMUG] Netonix POE
55v out of what exactly? It seems to me that they have internal DC-DC converters to regulate voltage per port You can see this if you go to "status" which shows 3V/24V/48V board voltages. As an example, I have several WS-12-250-DC models that I'm supplying ~54VDC to, but the 48V board voltage shows ~49VDC. On Fri, May 19, 2017 at 7:09 PM, Chuck McCown <[email protected]> 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.�
