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  #1  
Old 11-04-2019, 03:02 PM
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Toobuilder Toobuilder is offline
 
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Question Replace GNS430 with GNX375 - pinout help needed

Removing a 430 in favor of a 375 and trying to plan the pinouts before I dive in. First off, the current configuration has the 430 driving a legacy GRT Horizon (WS) and a Gi 106 CDI.

Pinouts are pretty straightforward with the exception of the 430's VOR/ILS ARINC outputs. I understand the 375 does not have a nav receiver, but the glideslope indications on the EFIS and the Gi 106 should respond to the LPV output, right?

If so, then the "other" ARINC outputs provide the LPV info to the EFIS and 106?

What is the difference between the "VOR/ILS" ARINC and any of the other ARINC outputs? Is it just a label or is their a functional difference?

Thanks
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  #2  
Old 11-04-2019, 05:16 PM
Pdtofly Pdtofly is offline
 
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Default GNX 375 pinout

Mike,

Send me your email address to hr2plt@yahoo.com, and I will send you a copy the GNX 375 pinout.

Brian
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Old 11-04-2019, 05:54 PM
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Toobuilder Toobuilder is offline
 
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Thanks Brian, but I do have the GNX installation manual. I also have the legacy GRT - 430 wiring diagram supplied by GRT. Between these two docs I've been able to do a nearly pin for pin conversion from the 430 to the 375. The main exception being what to do with the missing VOR/ILS ARINC input to the GRT... It's missing on the GNX375 since there's no nav receiver.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI - Flying
RV-8 - Flying
1940 Taylorcraft BL-65 -flying
1984 L39C - flyable, available for sale
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  #4  
Old 11-04-2019, 06:53 PM
BobTurner BobTurner is online now
 
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Either remove, or cut and cap with shrink wrap, the ‘ILS ARINC’ connections. Change the efis programing so it doesn’t expect anything on those inputs.
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Old 11-05-2019, 06:17 AM
h&jeuropa h&jeuropa is offline
 
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As Bob says, just leave the VOR/ILS inputs to your ARINC module disconnected. The vertical guidance for GPS is contained in the GPS ARINC sentence. See the 430W Install manual rev E, page 5-4 for more info.

Jim Butcher
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Old 11-05-2019, 08:54 AM
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Toobuilder Toobuilder is offline
 
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Thanks everybody.

Just to satisfy my curiosity, is the VOR/ILS ARINC sentence different from all the other ARINC ports? I thought the ARINC stream was a common buss that the various clients simply picked relevant info from, ignoring the rest.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI - Flying
RV-8 - Flying
1940 Taylorcraft BL-65 -flying
1984 L39C - flyable, available for sale
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  #7  
Old 11-05-2019, 11:44 AM
BobTurner BobTurner is online now
 
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Quote:
Originally Posted by Toobuilder View Post
Thanks everybody.

Just to satisfy my curiosity, is the VOR/ILS ARINC sentence different from all the other ARINC ports? I thought the ARINC stream was a common buss that the various clients simply picked relevant info from, ignoring the rest.
This is a good question, I would like to learn more too. My guess is that the label is too simple - something like ‘CDI deviation’ - so different types of CDI data must be kept physically separate, requiring separate ports.
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