Connecting both SkyView HDX and uAvionix AV-30-E to Garmin GPS 175

[Plopper]

I know how to connect a Garmin GPS 175 to an SV-ARINC-429 to talk to SkyView and I also know how to connect a Garmin GPS 175 to an uAvionix AV-30-E. Not surprisingly the SV-ARINC-429 and the AV-30-E connect to the same pins on the Garmin GSP 175.

Now, how do I connect both SkyView (SV-ARINC-429) and the AV-30-E (which I want to use as a backup HSI in case I am doing IFR)? As far I know, the ARINC standard allows up to 20 receivers.... Can I just splice the wires to/from the GPS 175 (connect both SV-ARINC-429 and AV-30-E in parallel) or should I somehow 'daisy chain' them?

And, do I need to setup different ARINC channels for both receivers (SkyView / AV-30) and if so, how does that work?

Many questions, but hopefully there are simple answers . Anyone out there that connected multiple devices to a Garmin GPS 175?

TIA, Roel

 

[Rhino]

Have you already used all the inputs on the SV-ARINC-429? It will accept multiple inputs. It's covered in Section 12 of the install manual and in the Third-Party Device Connection and Configuration Guide.

 

[Plopper]

UPDATE
I have done some further reading and research in the installation manuals of Garmin, Dynon and uAvionix and some valuable posts from other people on this platform, and my conclusion is that it is fairly simple and easy. I will splice the Garmin ARINC outputs 1A and 1B (pins 5/6 on J1751) and lead that to the ARINC inputs 1A and 1B of the Dynon SV-ARINC-429 (pins 23/11 on D25) and the ARINC inputs 1A and 1B of the uAvionix AV-HSI (pins 5/8 on D9).

The ARINC TX of the Dynon (pins 25/13 on D25) will then be connected to the ARINC RX 1 of the Garmin (pins 27/28 on J1751) and the ARINC TX of the uAvionix AV-HSI (pins 6/7 on D9) to the RX 2 of the Garmin (pins 48/49).

An additional serial line from Garmin RS-232 OUT 1 (pin 9 on J1751) will be connected to the SERIAL RX of the Dynon (pin 3 on D25).
Optionally I will use a second RS-232 OUT for ADS-B OUT to my Dynon transponder, and connect the dimmer circuit to the dedicated pin for that on the Garmin.

I intend to use the following software settings:

Garmin GPS 175:
RX Port 1: Format EFIS/ADC, Speed High
RX Port 2: Format Standby EFIS, Speed High
TX Port 1: Format GAMA Format 3, Speed High, SDI Common

Dynon SkyView:
INPUT SPEED= HIGH
INPUT 1 = GPS 1
NAVIGATION SOURCE DISP NAME = GPS175
INPUT 2 = NONE
NAVIGATION SOURCE DISP NAME = NONE
OUTPUT SPEED = HIGH


uAvionix AV-30-E:
(AVHSI CFG)
SERIAL 1 = AV-HSI
GPS NAV SRC = SERIAL 1
429 RX1 SPEED = HIGH
429 RX1 SDI = COMMON
429 TX SPEED = HIGH
429 TX SDI = COMMON


I will have to test with transmission speeds (High or Low) for the uAvionix: recommended settings per installation manual says LOW, but HIGH is selectable and the speed MUST match the settings on Garmin, where TX speed will be set to HIGH, being the recommended setting for Dynon, my primary system.

Comments and tips for improvement are highly appreciated.

 

[Plopper]

Have you already used all the inputs on the SV-ARINC-429? It will accept multiple inputs. It's covered in Section 12 of the install manual and in the Third-Party Device Connection and Configuration Guide.

Thank you for your comment. I do not quite understand how I could use both inputs on the SV-ARINC-429?

I see both SkyView and my uAvionix AV-30 as 'receiver'. As I wrote in my previous (update) post, it seems I simply need to splice the Garmin TX (output) and lead that to both my SkyView SV-ARINC-429 and uAvionix AV-30. I will then use both inputs (RX) on the Garmin to receive the TX signals from SkyView and AV-30, where SkyView will be configured in the Garmin as (primary) EFIS/ADC and the AV-30 as (backup) STANDBY EFIS. I think (hope) that will do the trick...

 

[Malndi]

Interested in how it goes. Please keep us updated.