Tonight I'm reading through a GPS175 install manual to wrap my head around the wiring requirements, which means...questions. Oh yes indeed.
Brief overview of my intended installation: EFIS will be a dual Skyview HDX system with the ARINC-429 interface box. The GPS will also be providing serial data to the Skyview transponder and an Artex ELT. No other Garmin stuff installed anywhere.
First, regarding the pinouts: it would appear that out of this monster 62-pin connector, I really only need a small handful of connections:
61 ground (enable auto power on)
9 serial 1 out (to SV-ARINC-429)
8 serial 2 out (skyview xpdr)
7 serial 3 out (ELT)
5 ARINC 429 out 1A (to SV-ARINC-429)
6 ARINC 429 out 1B (to SV-ARINC-429)
27 ARINC 429 in 1A (to SV-ARINC-429)
28 ARINC 429 in 1B (to SV-ARINC-429)
This seems like a comically small usage, but most everything else seems like it'd pertain to driving analog instruments like a CDI. Does this seem right at a glance? Am I missing anything important?
Second, and sort of springing off #1, there are four pins for a "config module." Is this something required for all installations? Is this module included with the unit? As in, do I even have to care about this?
Appreciate any info.