Re: [AFMUG] GIGE-POE-APC Hot?

Wed, 09 Sep 2015 10:11:27 -0700 

IIRC, the AF24 and brethren will handle up to 56V.

bp
<part15sbs{at}gmail{dot}com>

On 9/9/2015 9:04 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 <[email protected] <mailto:[email protected]>> 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:[email protected]>
    *Sent:* Wednesday, September 09, 2015 9:30 AM
    *To:* [email protected] <mailto:[email protected]>
    *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
    <[email protected] <mailto:[email protected]>> wrote:

        The stock AF24 power supply is 50v, if I remember correctly.
        On Wed, Sep 9, 2015 at 9:37 AM, Josh Luthman
        <[email protected]
        <mailto:[email protected]>> wrote:

            Isn't AF24 only 48v?
            Josh Luthman
            Office: 937-552-2340 <tel:937-552-2340>
            Direct: 937-552-2343 <tel:937-552-2343>
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            On Wed, Sep 9, 2015 at 10:33 AM, Chuck McCown
            <[email protected] <mailto:[email protected]>> 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:[email protected]>
                *Sent:* Wednesday, September 09, 2015 8:16 AM
                *To:* [email protected] <mailto:[email protected]>
                *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
                <[email protected] <mailto:[email protected]>> 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:[email protected]>
                    *Sent:* Wednesday, September 09, 2015 8:43 AM
                    *To:* [email protected] <mailto:[email protected]>
                    *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

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