Wiring KDR-510

Chad Lemmen writes:

Why does the KDR-510 datalink receiver use two input wires for power and
two for ground? The schematic looks like this

KDR-510
3A
10-30 VDC---()-------------Power positive 1
\------------Power positive 2


Ground-------------|-------Power ground 1
|-------Power ground 2


Is the power positive 2 and power ground 2 wires just for redundancy?
I've never seen any avionics that use two wires both for power and ground.
Do both 1 and 2 need to be hooked up or just power and ground 1?

I've seen this used in computer wiring where more power is needed on
"one" lead than on the others. This lets them use a smaller connector
(with one or two additional pins). Power and ground are the things
that's likely to be the issue for with avionics, so maybe that's the
purpose?
--
David Dyer-Bennet, , www.dd-b.net/dd-b/
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