Garmin 480 Wiring
(Dynon) - We do not have a 480 here so we can't promise anything, but from looking at the manuals:
Edit 22 Dec 2008 by Breister - I have version 2.0 of the GNS 480 software / v5.0 Dynon and NO combination of settings works either for Nav or for GPS using ARINC. Serial works for GPS; there might be a setting which would work for Nav too, but I'm using the other serial line for my 496 and hoping for an ARINC fix. In a discussion with a Garmin field repair tech he recommended some settings (shown in table below) which do not exist in my version of the GNS 480 software. v 2.3 has JUST been released, and requires taking the aircraft to a Garmin authorized repair agent to do the software update and to replace the antenna (the antenna will be provided by Garmin free of charge; expect up to 3 hours labor to complete the upgrade).
So, I will provide an update on this board once I get the GNS 480 updated.
On the GNS 480 side, only Input #2 accepts EFIS command. The HS34 has two sets of pins which will output ARINC, but that is only for convenience because both pairs output the exact same thing so you can use HS34 ARINC output #1 or #2. Only output setting is "Enable."
|CNX-80 / GNS 480 WITH HS34|
|Garmin GNS 480||Dynon HS34|
|P5 (78 Pin)||4||ARINC 429 Tx Channel 1A||Gamma 429 / Low||Fem D25||23||ARINC 429 RX 1-A||Gama GPS / Low||GPS HSI Data - not functioning with v2.1|
|P5 (78 Pin)||24||ARINC 429 Tx Channel 1B||Gamma 429 / Low||Fem D25||11||ARINC 429 RX 1-B||Gama GPS / Low||GPS HSI Data - not functioning with v2.1|
|P5 (78 Pin)||7||ARINC 429 Rx Channel 1A||EFIS / Low||Fem D25||25||ARINC 429 Tx 1-A||Output "On" / Low||No confirmed functionality in GPS mode|
|P5 (78 Pin)||27||ARINC 429 Rx Channel 1B||EFIS 429 / Low||Fem D25||13||ARINC 429 Tx 1-B||Output "On" / Low||No confirmed functionality in GPS mode|
|P5 (78 Pin)||5||ARINC 429 Steering Output Channel 2A||VOR/ILS / Low||Fem D25||22||ARINC 429 Rx 2-A||Gama Nav / Low||VOR / Confirmed with v2.1; awaiting 2.2 confirmation|
|P5 (78 Pin)||25||ARINC 429 Steering Output Channel 2B||VOR/ILS / Low||Fem D25||10||ARINC 429 Rx 2-B||Gama Nav / Low||VOR / Confirmed with v2.1; awaiting 2.2 confirmation|
|P5 (78 Pin)||8||ARINC 429 Input Channel 2A||EFIS Sys 1 / Low||Fem D25||24||ARINC 429 Tx 2A||Output "On"||Should provide Nav course setting back to 480 (Note: Same output as Tx 1)|
|P5 (78 Pin)||28||ARINC 429 Input Channel 2B||EFIS Sys 1 / Low||Fem D25||12||ARINC 429 Tx 2B||Output "On"||Should provide Nav course setting back to 480 (Note: Same output as Tx 1)|
|P5 (78 Pin)||30||Serial #8 (use only if you don't have HS34)||Alt Enc / 1200||Vertical Fem D25 (D180 - NOT HS34!!!)||13||Serial Output||Alt Encoder / Format 1||This is NOT necessary - ARINC provides baro from HS34 toCNX80/GNS480|
|P1 (Main)||4||RS232 RxD1 (Input)||SL 30||Male D25||14||Serial 1 Tx||SL 30 Command||Unconfirmed if this does anything|
|P1 (Main)||5||RS232 TxD1 (Output)||MAPCOM 9600||Male D25||1||Serial 1 Rx||Aviation 9600||Provides GPS Course - CONFIRMED|
Final thought: May wish to keep the serial connection for GPS even if the ARINC proves to work with v2.3, as this would provide a backup connection in the unlikely event that the wires somehow failed in flight. This can be enabled / disabled in flight in the HSI setup.