Hooked up the PoE supply using the recommended polarity, and a 12vdc battery
(about 12.5vdc). The board ran fine (a bit warm, 50 degrees C in open air,
(indicated temp. from configurator), pulling about .6A. Loaded SG-4400
(v4.43a). Ran for awhile with the hardware reboot timer enabled, but it
looked like it was doing serial reboots, so disabled the timer.
Worked fine for about 24 hours, then this morning, noticed that the board
was offline and there was a hissing sound coming from the circuits. Vbat=
12.2vdc. Did a hard reboot, and the board came up for a few minutes, then
went right back to offline. Changed the polarity to 7/8 positive and 4/5
negative. Board has come up and stayed up for the last 5 minutes, but the
hissing sound persists.
More to come...
----- Original Message -----
From: "Dan Metcalf" <dan.metcalf@wbsysnet.com>
To: "'Karlnet Mailing List'" <karlnet@WISPNotes.com>
Sent: Wednesday, October 01, 2003 6:52 AM
Subject: RE: [Karlnet] KN-200 PoE
> I would suggest that no more than 14-18volts go into the unit, and don't
> use the moto injectors as they are reversed and cause's the unit to hiss
> and will burn out the board or the injector in time
>
> if you keep (Ethernet port at kn200) voltage around 12volts, you should
> be ok
>
> > -----Original Message-----
> > From: karlnet-bounces@WISPNotes.com
> [mailto:karlnet-bounces@WISPNotes.com]
> > On Behalf Of Charles Chia Sheng Wu
> > Sent: Tuesday, September 30, 2003 11:32 PM
> > To: Norm Young; Karlnet Mailing List
> > Subject: RE: [Karlnet] KN-200 PoE
> >
> > actually, no
> > due to overheating issues, there's now a power supply range to use
> (and
> > ONLY
> > use)
> >
> > -Charles
> >
> > -----Original Message-----
> > From: karlnet-bounces@WISPNotes.com
> > [mailto:karlnet-bounces@WISPNotes.com]On Behalf Of Norm Young
> > Sent: Tuesday, September 30, 2003 10:01 PM
> > To: Karlnet Mailing List
> > Subject: [Karlnet] KN-200 PoE
> >
> >
> >
> > I'm trying to power up one of the new KN-200 boards. I'm looking at
> the
> > PoE
> > specs in the User Guide, and it appears that you can use any voltage
> from
> > 12-48vdc, and any polarity scheme on 4/5, 7/8. So, I thought I'd go
> with
> > roughly 15vdc, 7/8 positive and 4/5 negative. I'm hoping that this
> is
> > correct. (If so, it's pretty impressive.)
> >
> > Norm
> >
> >
> >
> > _______________________________________________
> > Karlnet mailing list
> > Karlnet@WISPNotes.com
> > http://lists.wispnotes.com/mailman/listinfo/karlnet
> >
> > _______________________________________________
> > Karlnet mailing list
> > Karlnet@WISPNotes.com
> > http://lists.wispnotes.com/mailman/listinfo/karlnet
> > --
> > [This E-mail scanned for viruses by Declude Virus]
>
>
> --
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