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 
Sent: Wednesday, September 09, 2015 9:30 AM
To: 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> 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> 
wrote:

    Isn't AF24 only 48v?


    Josh Luthman
    Office: 937-552-2340
    Direct: 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> 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 
      Sent: Wednesday, September 09, 2015 8:16 AM
      To: 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> 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 
          Sent: Wednesday, September 09, 2015 8:43 AM
          To: 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





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