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RE: Burned Connectors in PCs
How
many cards all together are using this much power?
Are
these designed for and used as hot-swap or live insertion?
How do
the boards look? (which pins are burnt/open/melted)?
Are
all of the pins on the connector connected to the the same power plane or are
there copper traces leading to the pins (power and ground)? <- This question
is for both the board and the mother board. If traces, what is the trace width
and weight of copper i.e. 60 mil * 1oz etc.
Are
there also decoupling capacitors that were damaged? (On the board and the mother
board.)
The
power these cards use, is it typically fairly constant in normal operation or
does it vary significantly (driving lots of motors or
solenoids etc.)?
Well,
this is all I can think to ask for now.
-rob
We have a rackmount PC with a 400 Watt
power supply. The power consumption of all our cards is quite high,
about 284 Watts, still less then 75% of the rating though. The power
supply is rated for
30-50A for the +5V
20-11A for the
+12V
Shared
between the 2
We are drawing 36A of +5 and 8A on the +12
The problem
is that, after time (6 months - 1 year), the units will fail and we noticed
that the connectors which mate with the backplane are actually fused(melted)
to the backplane. In line with the +5 V wires (red wires), the connector
is actually black and in many cases the connector is arc welded to the
backplane.
Ideas.
... Pierre