Jump to content

DIY G5 HSI installation


Recommended Posts

 Wry nice forum and info on G5

i bought one and hung it in old Collins ADF instrument hole on my M20K

works great. But I  

haven’t done any of the other plumbing.

Sounds like for two G5’s with century autopilot (I have the century41) you are talking 30-40 man hours with all plumbing .testing and 91.411 compliance.....is $10k of my kids inheritance a good figure?

Norm

 

 

 

 

Link to post
Share on other sites

*Members that donate $10 or more do not see advertisements*

  • Replies 115
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

Hi all About to embark on yet another project.  I’ll make this a running thread.  This will be a G5 HSI install interfaced to a century IIB autopilot.  Various resistors, capacitors and tran

Almost there one more afternoon and the thing should be wired in, and hopefully tested / configured.  I have to go to work tomorrow for a couple of days, but have an appointment with the avionics shop

I'm one step behind Brad, installing 2xG5's in a C172 with a GFC500 autopilot. Aerodon

Posted Images

On 9/11/2020 at 10:52 PM, Steep68 said:

My Thanks to Andy95w and ArtVandelay for their input. I 'm trying to keep the CAN bus runs short as possible and wanted to know if Brad was able to stick his GMU-11 inboard of the Century IIB roll servo, which I believe is in the next bay over.

My Thanks also carusoam. I found some mooneyspace.com posts very useful e.g. rocker switch covers, the effort to replace the recognition light with an led, etc. Please keep them coming.

Hank

Hey Hank - I went with the right wing (opposite the location of the roll servo).  This is the start of the can bus.  This minimizes magnetic interference from the Servo motor. 
 

It’s a good location if you’re ever considering putting in a GFC, the servo will also go on the right wing. So the can bus stays short.  
 

But it will fit perfectly in the large square inspection panel just onboard of the aileron bell crank.  

Link to post
Share on other sites
  • 3 months later...

Hoping you smart folks can help me out with this.  I am trying to do a dual G5 install to a Garmin 400W supervised by my A&P.  I bought a pre-made harness from an avionics shop in FL associated with Spruce.  It all seems to make sense when I reference the G5 and 400x install manuals EXCEPT the transponder tie in;  they left me what you see attached (ANNUNCIATE E, XPONDER RS-232, XPONDER ARINC).

So I understand that the 400W needs altitude info for VNAV approaches; that should be a signal wire into an RS-232 input.  The G5 manual says to use PIN 56 to output to the G5 so that means RS-232 "1" is going to be tied to the MAPMX (Or Aviation?) protocol if I read this. Altitude in needs to be Icarus-alt protocol, so that means I need to be in a different channel.  I checked the pre-made harness, and Channel 1 has an out only and Channel 2 has both in and out pins filled so I am guessing that PIN 59 is the Altitude input from the Transponder. 

What in the world are the ARINC and ANNUNCIATE E for?  Checking the 400W pinout, 46-51 are filled.  The G5 manual specs 46-49 for the G5 install so 50 and 51 must be what is labeled for the transponder but those are INs not OUTs.  I thought it was possibly to provide ADSB position info to a transponder but now im lost. 

Also, I work for NASA and do a lot of tinkering with micro-controllers and the such so I am not a stranger to wiring diagrams.  Need some help with these aviation wires however.  In the Garmin G5 manual, it tells you what wire is the orange, blue and white.  The transponder interconnect does not seem to be listed in the 400 series manual however -- How do I determine which wire set in the bundle is the signal for RS-232 and HI / LO for the AIRINC?  I am guessing the conductor that is joined between the RS-232 and ARINC and then comes out as a single wire is the ground for use in the External GPS Common Ground on the XPDR.  The ARINC cable is then left with two conductors (which makes sense) but why does the RS-232 bundle have 3? I could take the connector apart and check the color at the PINS, but I didn't know if there was a standard or something I could reference.  Thanks!

IMG_20210117_151632.jpg

IMG_20210117_151651.jpg

Edited by TCUDustoff
Link to post
Share on other sites

its not too hard to ring out the pins with a voltmeter that has a continuity beeper.  you place an alligator clip on the stripped end of the wire. then the other end of that goes to the test lead on the voltmeter. then find the pin with the other lead. note the pin number.. it helps greatly to write it down.

 

That daisy chained ground you are seeing gets a #8 ring terminal and grounded to the connector backshell

 

 

Edited by jetdriven
Link to post
Share on other sites

*facepalm*  DUH.  I feel like an idiot on not thinking about the multi-meter!

So that answers the pin-out question and the shielded ground.  I think I need to buy the pin insertion and removal tool.  Since I can't find any reason to need the Annunciate E, I am thinking of moving it to Serial Channel 3 OUT so I can wire that into my JPI 700.  End result would be:

Channel 1 would be MapMX OUT for the G5s, Channel 2 would be Icarus-alt for the Altitude IN, and Channel 3 would be Aviation for the JPI.   

And out of idle curiosity, why is there an option to send Aviation data to the GTX 327 Transponder? The C172 I used to fly had a 327 and I can't see how any of that data would be useful for it? 

Link to post
Share on other sites
3 hours ago, TCUDustoff said:

And out of idle curiosity, why is there an option to send Aviation data to the GTX 327 Transponder?

Because the GTX-327 can be configured to auto-switch between ALT and STANDBY based on GPS ground speed.

  • Like 1
Link to post
Share on other sites

Thanks Vance!  I see that now if I read the 327 install manual. 

I also checked every pin on this harness to better understand what is going on and it also appears as if they wired the G5s for a 430W and have the connector for VOR/ILS info wired up. *le sigh*  Now I am wondering I I should try and get rid of the 400W and pick up a 430W and replace my old Terra 760Ds at the same time...*double sigh*  It appears as if I would only need to add 7 wires to the harness to go to a GMA 340. (which also means replacing my com panel and intercom...should have known this would not be this easy!)

And carusoam, thanks! (but also no!) All the easy questions I figured out just be reading the forums ;)

Edited by TCUDustoff
  • Like 1
  • Haha 1
Link to post
Share on other sites
23 hours ago, TCUDustoff said:

Hoping you smart folks can help me out with this.  I am trying to do a dual G5 install to a Garmin 400W supervised by my A&P.  I bought a pre-made harness from an avionics shop in FL associated with Spruce.  It all seems to make sense when I reference the G5 and 400x install manuals EXCEPT the transponder tie in;  they left me what you see attached (ANNUNCIATE E, XPONDER RS-232, XPONDER ARINC).

So I understand that the 400W needs altitude info for VNAV approaches; that should be a signal wire into an RS-232 input.  The G5 manual says to use PIN 56 to output to the G5 so that means RS-232 "1" is going to be tied to the MAPMX (Or Aviation?) protocol if I read this. Altitude in needs to be Icarus-alt protocol, so that means I need to be in a different channel.  I checked the pre-made harness, and Channel 1 has an out only and Channel 2 has both in and out pins filled so I am guessing that PIN 59 is the Altitude input from the Transponder. 

What in the world are the ARINC and ANNUNCIATE E for?  Checking the 400W pinout, 46-51 are filled.  The G5 manual specs 46-49 for the G5 install so 50 and 51 must be what is labeled for the transponder but those are INs not OUTs.  I thought it was possibly to provide ADSB position info to a transponder but now im lost. 

Also, I work for NASA and do a lot of tinkering with micro-controllers and the such so I am not a stranger to wiring diagrams.  Need some help with these aviation wires however.  In the Garmin G5 manual, it tells you what wire is the orange, blue and white.  The transponder interconnect does not seem to be listed in the 400 series manual however -- How do I determine which wire set in the bundle is the signal for RS-232 and HI / LO for the AIRINC?  I am guessing the conductor that is joined between the RS-232 and ARINC and then comes out as a single wire is the ground for use in the External GPS Common Ground on the XPDR.  The ARINC cable is then left with two conductors (which makes sense) but why does the RS-232 bundle have 3? I could take the connector apart and check the color at the PINS, but I didn't know if there was a standard or something I could reference.  Thanks!

IMG_20210117_151632.jpg

IMG_20210117_151651.jpg

the three wires in the middle plus the two on the right of them need Garmin pins crimped on the ends. The wire on the left needs a blue ring terminal connector and connects to ground. . 

Link to post
Share on other sites

Cruiser,

Jet driven got me straight on the ground to the connector and yeah, I get that it needs the Garmin pin and then insertion into the transponder connector :)  I don't get why its three wires, however, when RS-232 would only be one or two wires depending if its on-way or bi-directional; the ARINC makes sense because it needs two wires and two are in the bundle.  Also, the 1 wire / 2 wire also matches the figures in the 430 Install Figures.  Not sure what they were trying to wire for on my harness.  I guess I am going to have to call them tomorrow.... Speaking of those figures... 

 

image.png.8d822332c1467cd4494924f2eb1f15f7.png

 

*Screwed up my snip.  Edited...should make sense now* 

For my education, in this diagram pins 21 and 22 are just wires without any external shielding taken to ground.  I am guessing the audio on pins 6,4 and 18 would be in three-conductor shielded wire and the outer shield would be grounded to the connector on only the GMA 340 end? Do you leave the other end on the 430W floating? Trying to make sure I understand the diagram nomenclature correctly, because if you look at the below figure I think it is trying to tell me that the wires need to be grounded on BOTH connectors.  Am I getting this correct?  

image.thumb.png.b9d8be6be0920f92fdcb030b37f1749d.png

 

Also...I hope I am not "hijacking" the thread since my goal is to do a self-install of the G5s! Hoping my questions will help somebody else wanting to do the same thing. 

Edited by TCUDustoff
Link to post
Share on other sites
15 minutes ago, TCUDustoff said:

For my education, in this diagram pins 21 and 22 are just wires without any external shielding taken to ground.  I am guessing the audio on pins 6,4 and 18 would be in three-conductor shielded wire and the outer shield would be grounded to the connector on only the GMA 340 end? Do you leave the other end on the 430W floating? Trying to make sure I understand the diagram nomenclature correctly, because if you look at the below figure I think it is trying to tell me that the wires need to be grounded on BOTH connectors.  Am I getting this correct?  

image.thumb.png.b9d8be6be0920f92fdcb030b37f1749d.png

 

Also...I hope I am not "hijacking" the thread since my goal is to do a self-install of the G5s! Hoping my questions will help somebody else wanting to do the same thing. 

Yes, that means that the shields for those pairs get grounded on both ends.   That's not normal practice in electronic communications because it encourages ground loops, but I see it specified in avionics fairly frequently.

 

Link to post
Share on other sites
On 1/17/2021 at 4:46 PM, TCUDustoff said:

What in the world are the ARINC and ANNUNCIATE E for?  Checking the 400W pinout, 46-51 are filled.  The G5 manual specs 46-49 for the G5 install so 50 and 51 must be what is labeled for the transponder but those are INs not OUTs.  I thought it was possibly to provide ADSB position info to a transponder but now im lost. 

IF these wires are connected from the G5 ------> the transponder I would guess they wired it so you can get the Altitude data on either the RS232 OR the ARINC429 lines. 

The ONLY connection needed from the transponder would be a GPS source if it is not provided from some other (GNS400W) source. IF you used the RS232 lines for that, you would need the ARINC lines for something else.

If you have the G5 connected to the GNS400W, you will not need any connection to the transponder as far as I can see. 

 

Link to post
Share on other sites

Cruiser,

From what I can tell the harness has ARINC IN 2 going to the transponder...makes ZERO sense to me.  The G5 only has serial direct from the 400W; the rest of the inputs come from the GAD and ARINC per G5 Install Manual Figure 5-12 Dual G5 with GPS/VHF Navigator.  Its evident they built the harness to that figure (per the included paperwork) and then had the weird transponder crap.

I have a line on a used Garmin 330 and a 430W.  Thinking of swapping my AT-150 for that and then configuring it for serial output into the 430W and then at some point when funds recover, send the 330 out for an ES upgrade.  Then at least I get audible traffic alerts....

Should be simple with supervision from the avionics guru on the field to add the pins to configure for a 430 and a real com panel.  Always good to exercise my soldering skills :)

Edited by TCUDustoff
Link to post
Share on other sites

No serious hijack issue here...

As the OP did a great job with the discussion two years ago...

Consider, if you want to start a new topic...

Or just keep going...

Still hoping for a high arc softball question I can take a swing at...   :)

Best regards,

-a-

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


*Members that donate $10 or more do not see advertisements*



×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.