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Scott,
are you saying that we will still be OK since we will be actually using 175ma per trace,
which is 350ma total through our loop?
Are these traces copper or something else?
-----Original Message-----
From: Scott J. Carter [SMTP:scott_j_carter@xxxxxxxxx]
Sent: Friday, May 04, 2001 10:42 AM
To: Brooks, Rick [SC5:321:EXCH]; Jack Andresen; stds-802-3-pwrviamdi
Subject: Re: Potential heating problem with standard patch Cat5 panels
We have seen Cat5E patch panels (from a vendor who shall remain nameless) blow traces at about 250ma. Some vendors use very thin traces indeed.
----- Original Message -----
From: Rick Brooks <mailto:ribrooks@xxxxxxxxxxxxxxxxxx>
To: Jack Andresen <mailto:jandresen@xxxxxxxxxx> ; stds-802-3-pwrviamdi@xxxxxxxx <mailto:stds-802-3-pwrviamdi@xxxxxxxx>
Sent: Friday, May 04, 2001 6:58 AM
Subject: RE: Potential heating problem with standard patch Cat5 panels
From my personal experience, a 12 degree C rise is trivial and would not cause any
PC board discoloration, unless the PC board was operated above 100 degree C.
Or the PC board material is faulty. I wonder if it is FR4.
If the patch panels are being damaged, there must be a whole lot more current involved than 350ma,
or the traces are very thin, or it has a different cause.
- Rick
-----Original Message-----
From: Jack Andresen [SMTP:jandresen@xxxxxxxxxx]
Sent: Thursday, May 03, 2001 2:21 PM
To: stds-802-3-pwrviamdi@xxxxxxxx
Subject: Potential heating problem with standard patch Cat5 panels
A customer mentioned panels burning up when one of his customers senr
power down the network.. I did some canculations and found a potential
problem.
Jack Andresen << File: DTE power.doc >>