Ok, using a fan blowing over the edge of the board, Tboard= 86F, with
Tamb=75. The board seems to be running OK, which would be nice, because I
don't really want to send it back! Current draw for the whole thing is
around .8A at 12vdc.
Norm
----- Original Message -----
From: "Norm Young" <lists@applegatebroadband.net>
To: "Karlnet Mailing List" <karlnet@wispnotes.com>
Sent: Friday, October 03, 2003 1:19 PM
Subject: Re: [Karlnet] KN-200 PoE update
> I did get a bright yellow warning page, that I read completely. It
referred
> me to the system integration guide that talked about using...a fan.
>
> I was just running the system on the bench, and the damn thing requires a
> fan.
> (Where, exactly is a bit of a question.) It's not like it was sitting
> inside an enclosure, or at least one that was closed. It has substantial
> vents and the cover was off! Ambient was 75 degrees F, not exactly
roasting.
> This thing is fragile! Not very robust hardware, IMO.
>
> If the board requires a fan, then, by all means, spend the extra $2,
Karlnet
> and put one on it. Let's not dance around the issue, put a mount right
> where the heat is generated. Then it would be clear, very clear that
> running this board without a fan is an exercise in futility.
>
> ARgggh!
>
>
> ----- Original Message -----
> From: "Caleb Carroll" <karlnet@pathcom.ca>
> To: "Norm Young" <lists@applegatebroadband.net>; "Karlnet Mailing List"
> <karlnet@WISPNotes.com>
> Sent: Friday, October 03, 2003 11:54 AM
> Subject: Re: [Karlnet] KN-200 PoE update
>
>
> I personally wouldn't ever consider running one of these without cooling.
I
> tested out a KN-100 sitting on my desk with no radio card and the
> temperature would climb to 48C (ambient is about 20C). This was using a
9V,
> 1W power supply.
>
> When you got the KN-100 or KN-200 board did you get a bright yellow
> WARNING!!! page that tells you to look at the max temperature specs in the
> System Integration guide? If you didn't, where did you buy the board
from?
>
> *********** REPLY SEPARATOR ***********
>
> On 2003-Oct-03 at 11:24 AM Norm Young wrote:
>
> >Caleb, just ambient (about 75F). No fans.
> >
> >If I need a fan, I want my money back, as this thing is going to go on a
> >solar powered WIPOP, and the last thing I want is cooling systems sucking
> >down very, very precious power.
> >
> >As a side note, I've bypassed the PoE, and the system is running off the
> >standard power connector, and so far, has run about an hour and a half.
No
> >hissing noise now. Temperature (which is indicated in all of the
> >configurators, as far as I can see---currently I'm using 4.43) is right
at
> >49C, 120F. This is in a well ventilated, metal enclosure with the cover
> >off! Ambient is about 75F.
> >
> >And the system ran for about a hour, then died again. Definately RMA or
> >money back time....
> >
> >Norm
> >
> >----- Original Message -----
> >From: "Caleb Carroll" <karlnet@pathcom.ca>
> >To: "Norm Young" <lists@applegatebroadband.net>; "Karlnet Mailing List"
> ><karlnet@WISPNotes.com>
> >Sent: Friday, October 03, 2003 8:51 AM
> >Subject: Re: [Karlnet] KN-200 PoE update
> >
> >
> >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
> >>> >
> >>> >
> >>> >
> >>> > _______________________________________________
> >>> > 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]
> >>>
> >>>
> >>> --
> >>> [This E-mail scanned for viruses by Declude Virus]
> >>>
> >>> _______________________________________________
> >>> 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
> >
> >
> >
> >
> >_______________________________________________
> >Karlnet mailing list
> >Karlnet@WISPNotes.com
> >http://lists.wispnotes.com/mailman/listinfo/karlnet
>
>
>
>
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