Just out of curiosity... Were you using anything to cool the board?
*********** REPLY SEPARATOR ***********
On 2003-Oct-03 at 8:31 AM Norm Young wrote:
>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
>> >
>> >
>> >
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