4500sEE, ARINC, GNS430 (non-waas), GTX327, AFS Pilot wiring/configuration

[larco]

If I recall correctly? Pin 10 on the EFIS is the encoder out going to the 327, the 430 the AP and what ever else that needs the serial encoder info so it has to be spliced as needed to go where is needed. It is at first it seems very confusing but if you follow the AFS diagram it should work. Also the 430 and 430W in this regard are the same. If however you want it to be part of your ADSB equipment then you would need an update to WAAS, don't complicate your thoughts with that now? BTW, If you got the wiring harness with all this equipment, it might already be laid out for you?? Hope this helps. Larry

[rv7charlie]

Thanks, Larry. No joy on the factory harness; I've rolled my own. I think my confusion started many months ago, reading about using both the ancient 430's gps data (for IFR legality) and the potential to use a later model external gps puck as a secondary selectable gps source feeding the EFIS (for better update rates). I left myself a shielded set of pigtails from the EFIS Main pins 9,10,22 (serial #1) intending to add a gps puck, and apparently that serial port must be wired to the 430 P4001 pins 56,57. I assumed that the EFIS would get all the info it needed from the 430 via the ARINC, but apparently, that isn't the case. I'm working on that mod now.

I guess I need to give up on the idea of a second gps feeding the EFIS.

If I'm reading the manual correctly, pin 10 is serial #1 out to GPS (the 430??) and pin 22 is serial #1 receive from the GPS (again, 430??). My v7.4 of the manual shows pin 13 as serial #2 out to the transponder. If I can parallel multiple destinations from one serial port, that could give a lot of flexibility; thanks for the tip.

Any future ADSB will have its own WAAS source, so no risk of that complication. :-)

Still not sure why Garmin would want to feed transponder serial data out of pin 20 back to the 430, but that's what their drawing shows...

Thanks again,

Charlie

[larco]

I recommend using the AFS diagram to connect everything. It works. You can actually have a second GPS but I do believe it will need it's own serial port. Once this is working correctly and if you have an extra serial port call AFS for an antenna option. To add---- I had for a long time your set up with 2 4500s and wired it using AFS diagrams and it was great. Larry

[rv7charlie]

I'm working on that now. I only had a few variations. At this point, I suspect that it's mostly overlooked items, instead of deviations. I'll keep you updated via email.

Thanks,

Charlie

[mikev]

... the 430 and 430W in this regard are the same. If however you want it to be part of your ADSB equipment then you would need an update to WAAS...

I wanted to share one minor difference between a 430 and 430W if you ever decide to upgrade. We have a Sportsman that had a 430 that needed repair. Due to the Garmin flat rate pricing for repairs and the fact that an upgrade to a 430W included any repairs to the 430, we elected to go with the 430W upgrade path. The avionics dealer was nice enough to install a 430W loaner during the time that 430 was out to Garmin.

On a night fight, we turned on the panel/avionics lighting and immediately had the smell of burning electronics and some smoke. After turning off the lighting and appropriate POH procedures, the flight completed without further incident. After inspection, the source of the smell / smoke was the 430W. The avionics shop was none too happy and blamed the original panel provider with mis-wiring and wanted us to pay for the damage to the 430W. We contacted the original panel manufacturer who was quite helpful and told us that there is a known incompatibility between the 430 and 430W lighting connections. There is a Garmin publication that describes this, but he couldn't share the document since it was for dealers only.

If you do decide at some point to get a 430W, I'd suggest you get that document from Garmin as part of the upgrade. I've looked at the installation manuals and don't see any obvious difference, but perhaps that the problem that the bulletin clarifies.

Mike