IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM - IFD with Dynon HDX and external backup CDI

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IFD with Dynon HDX and external backup CDI

Printed From: Avidyne
Category: Avidyne General
Forum Name: IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM
Forum Description: Topics on Avidyne's IFD 5 Series and IFD 4 Series Touch Screen GPS/NAV/COM
URL: http://forums.avidyne.com/forum_posts.asp?TID=2705
Printed Date: 29 Nov 2024 at 3:25am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com

Topic: IFD with Dynon HDX and external backup CDI

Posted By: brou0040
Subject: IFD with Dynon HDX and external backup CDI
Date Posted: 28 Nov 2024 at 10:24pm

For redundancy in case of a HDX screen or ADAHRS failure, I'm looking into keeping my GI-106A external CDI that is connected now via the main indicator interconnect (not 429) and connecting an HDX via 429 and RS232. I'm worried about the IFD getting CDI VLOC desired course mixed signals due to getting this from multiple sources (resolver from GI-106A and 429 from HDX).

Does anyone have experience with this configuration? Can I disable 429 in into the IFD and not connect the 429 from the HDX ARINC 429 to the IFD? Did it need this 429 data for anything? It seems like it'll already have the data it needs natively and via RS232. I think this would mean I would only be able to select the NAV course on the GI-106A, but the IFD would get this from the resolver via the main indicator interconnect wiring. Would the IFD then output this course to the HDX to sync the courses between the CDIs?