Hi!

Even if 2A is just 'passing by' pins, it has to get into the cable somewhere,
probably through a pin!
You could use say a 20-way IDC connector, using four or five pins for power
and the same number of pins for ground=2E I think these are rated at 1A max per
pin=2E
This still leaves you with at least 10 pins for data/control=2E

/Hugo



-----Ursprungligt meddelande-----
Fr=E5n: dparks@UVIC=2ECA [mailto:dparks@UVIC=2ECA]
Skickat: den 28 november 2002 02:25
Till: PICLIST@MITVMA=2EMIT=2EEDU
=C4mne: [EE]: How to make multi-drop wiring harness


Hello,

I have about 6 boards that will reside on an I2C bus=2E  In addition, they are
all to be powered from the same source and have other lines in common (D1W
bus, emergency stop signal, etc=2E=2E=2E)=2E  In total there is 9 lines common to
each board=2E  All boards together will draw around 2A, but no board will take
more than 500mA=2E  I know that most connectors have ratings for maximum
current per pin=2E  Should I find a connector that can handle 2A (as 2A will
be flowing by the pin, but not through it)?  What are common connectors used
to makes a multi-drop wiring harness?

Right now, I am looking at using and IDE style harness (i=2Ee=2E what is
commonly found in a computer to connect the IDE port to a HD and CD-ROM)=2E
Specifically, the GW Industries Socket Connectors (digikey # CSC16T)=2E  Is
this a common/good way to go?  I have no experience with this so any and all
comments are appreciated=2E

Also, are there some "rules of thumb" on how to layout the signals=2E  For
example, I will have +5V, +12V, -12V, ground, a digital I/O signal, and an
analog signal in the lines=2E  Should all the power signals be together and
seperated for the analog signal? or is it best to keep ground seperated from
the other power lines?

Thanks,
Donovan Parks

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