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Re: [Karlnet] KN-200 PoE update

To: "Karlnet Mailing List" <karlnet@wispnotes.com>
Subject: Re: [Karlnet] KN-200 PoE update
From: "Norm Young" <lists@applegatebroadband.net>
Reply-to: Norm Young <lists@applegatebroadband.net>, Karlnet Mailing List<karlnet@WISPNotes.com>
Date: Fri, 3 Oct 2003 11:24:01 -0700
List-post: <mailto:karlnet@WISPNotes.com>
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
>> >
>> >
>> >
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>> >
>> > _______________________________________________
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>>
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>
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