I asked Control Vision to answer some queries about their Exp Bus DC Management
Unit
(see http://www.controlvision.com). They came back with answers which I am am
happy with.
Question: Under full load the EXp Bus could potentially be carrying 40 Amps.
Some
would say that a
bunch of wires and connectors is going to be better than a printed circuit board
under these
circumstances. What have you done to ensure that the Exp Bus can handle this
sort
of load?
>
> We have used massive traces with heavy copper plating, and our board can
> take well in excess of 60 amps of DC current (tested!)
>
>
Question: Because the PCB could have some connectors or track exposed
is there a possibility that a short may occur resulting in catastrophic failure?
>
> Again, we thought of that. The PC board is conformal coated with a
> resin, covering all traces and pads and solder connections. The
> terminals ARE exposed, as are all terminals in every spam can aircraft I
> have ever had the misfortune to venture under the instrument panel of...
>
> Really, if this is a concern, simply form an enclosure around the pc
> board with a piece of vinyl, or aluminum. We considered an enclosure,
> but as all homebuilts are different, this was deemed to be impractical.
> >
> If you get the product, and are concerned that it won't
> perform safely, we will gladly return your money [although shipping
> charges to NZ and back would be your gamble!!!) Always remember that in
> an aircraft, you must be totally sure of the technology you are using, we
> understand that this is rule number 1!!!
Personally, I am far happier with solid state fuse technology as implemented on
the
Exp Bus than with circuit breakers or fuses. I think these guys have developed
a unit which will
considerably simplify electrical wiring homebuilders and is probably much more
reliable than hand wired looms.
Tony
#272
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Date: 10/25/96
Time: 14:32:05 New Zealand Summer Time (UTC +13)
Kaon Technologies - Building Tomorrow's Networks
PO Box 9830
Newmarket
Auckland Ph +64 9 358 9124
New Zealand Fx +64 9 358 9127
Visit http://www.kaon.co.nz
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