I did mention this here when I was bench testing powering an AF24. My
Traco was floating at 55 volts. The radio ran fine.
It's not that it's powering the radio and getting hot. If you feed the
card with 50+ volts, the LED still gets hot. I remember that Chuck did
say it should be fine up to 60VDC.
I'm going to be using a lot more of these on more site 48VDC
conversions. So Chuck, is this something that can be changed? Is there
any risk of severe overheating if I have these running in a hot
enclosure? Some sites we just can't do ventilation because of grain dust
and things of that nature.
On 9/9/2015 11:04 AM, Josh Baird wrote:
So, there are people here powering AF24's with 54-55 (float) voltage
without issues? Just trying to rule this out.
On Wed, Sep 9, 2015 at 11:47 AM, Chuck McCown <ch...@wbmfg.com
<mailto:ch...@wbmfg.com>> wrote:
No, 54-55 is a good float voltage for lead acid 48 VDC batteries.
The voltage itself has nothing to do with the data.
Too much current could affect it, but in my testing, the chip with
the magnetics will unsolder itself before it stops passing data.
*From:* Josh Baird <mailto:joshba...@gmail.com>
*Sent:* Wednesday, September 09, 2015 9:30 AM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] GIGE-POE-APC Hot?
Stock is 50V. I'm running them directly off a Traco TSP (~54V).
I wonder if this is why the ethernet keeps dropping.
On Wed, Sep 9, 2015 at 11:27 AM, Mathew Howard
<mhoward...@gmail.com <mailto:mhoward...@gmail.com>> wrote:
The stock AF24 power supply is 50v, if I remember correctly.
On Wed, Sep 9, 2015 at 9:37 AM, Josh Luthman
<j...@imaginenetworksllc.com
<mailto:j...@imaginenetworksllc.com>> wrote:
Isn't AF24 only 48v?
Josh Luthman
Office: 937-552-2340 <tel:937-552-2340>
Direct: 937-552-2343 <tel:937-552-2343>
1100 Wayne St
Suite 1337
Troy, OH 45373
On Wed, Sep 9, 2015 at 10:33 AM, Chuck McCown
<ch...@wbmfg.com <mailto:ch...@wbmfg.com>> wrote:
OK, there are some half watt resistors in that area.
When running at 55 volts limiting current for the LEDs
they do get hot. Their temp depends on system voltage.
I had hard to make the LEDs usable for a range of 6-60
volts without some tradeoff.
As long as the large chip isn’t getting hot you are OK.
*From:* Josh Baird <mailto:joshba...@gmail.com>
*Sent:* Wednesday, September 09, 2015 8:16 AM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] GIGE-POE-APC Hot?
Yeah, it seems to be just the area around the LED. The
connector is not very hot at all.
On Wed, Sep 9, 2015 at 9:54 AM, Nate Burke
<n...@blastcomm.com <mailto:n...@blastcomm.com>> wrote:
Or is it the area right by the LED's?
On 9/9/2015 8:52 AM, Ken Hohhof wrote:
The connector is hot? That can’t be right.
*From:* Josh Baird <mailto:joshba...@gmail.com>
*Sent:* Wednesday, September 09, 2015 8:43 AM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* [AFMUG] GIGE-POE-APC Hot?
We just installed our first GIGE-POE-APC which is
powering an AF24, and noticed that it gets VERY
hot. So hot that it almost instantly burns your
finger when you touch the green molding. For
folks that have these installed, is this normal?
It's ran fine for a few days, but this morning we
we noticed that the ethernet link on the AF24 was
dropping (and coming back very quickly). I'm not
sure if it's related or not.
Josh
