Garmin 175 and SL30 with G5

[ThorLasVegas]

Hi there. I am trying to do a Garmin 175 with an SL30 as number 2 Nav Com. My number 1 comm is a Garmin 205

The G5 only accepts one serial port. I am trying to figure this out from the manuals but not totally 100 percent yet.

Can I do the 175 through the GAD 29 Airinc connection and the SL30 through the serial and then switch between green and magenta needles on the G5? Looks like I can...

 

[jackking123]

Hi there. I am trying to do a Garmin 175 with an SL30 as number 2 Nav Com. My number 1 comm is a Garmin 205

The G5 only accepts one serial port. I am trying to figure this out from the manuals but not totally 100 percent yet.

Can I do the 175 through the GAD 29 Airinc connection and the SL30 through the serial and then switch between green and magenta needles on the G5? Looks like I can...

You should check out the G5 manual and give a call to Garmin.

Been a while since I wired my G5 and GPS 172 but YES you need the GAD 29 ARINC. Yes you can connect SL30 VOR/LOC/GS serial port.

I Googled this phrase
"how to wire a Garmin G5 with a Garmin GPS 175 and an SL 30"

There is a wealth of information, with links to videos, here is some cut and paste:

Wiring a Garmin G5 with a GPS 175 and SL 30 involves using a GAD 29 ARINC 429 interface module, connecting the SL 30 via RS-232, and potentially adding a MapMX RS-232 link for a better GPS source, requiring custom harness building and configuration for source selection (GPS vs. VLOC) and potentially an external source selector for non-Garmin autopilots. This is a complex avionics integration, not a simple plug-and-play, demanding adherence to Garmin installation manuals for wiring, connector assembly, and setup.
Key Components & Connections:

1. GAD 29 (ARINC 429 Interface): Essential for the G5 to receive GPS data (like from the GPS 175) in ARINC 429 format, as the G5 needs this for full HSI functionality.
2. GPS 175 (GPS Data): Connects to the GAD 29 via ARINC 429 and potentially to the G5 via RS-232 (MapMX) for high-quality GPS data.
3. SL 30 (NAV/COM): Connects directly to the G5 via an RS-232 serial link for VLOC (VOR/ILS) navigation data.
4. G5 (EHSI): Receives data from both sources and requires configuration to select between GPS and VLOC inputs.

Wiring Steps & Considerations:

1. Build Harnesses: Create custom harnesses with correct pinouts, ensuring proper shielding and strain relief.
2. Power & Ground: Connect aircraft power and ground to all units and the GAD 29.
3. Data Connections:
   • GPS 175 to GAD 29: ARINC 429 data (e.g., ARINC Out 1 from 175 to ARINC In 1 on GAD 29).
   • GAD 29 to G5: ARINC 429 data to the G5's ARINC input.
   • SL 30 to G5: RS-232 data (split if needed) to the G5's RS-232 input.
   • GPS 175 to G5 (Optional): RS-232 MapMX for enhanced GPS data.
4. Source Selection: Install a switch and annunciator (if needed) for pilots to select between GPS and VLOC sources on the G5, especially crucial if you have a non-Garmin autopilot.
5. Configuration: Use the G5's setup menu (Interfaces, ARINC 429, RS-232) to define the connected equipment and data formats (e.g., GDU Format 1, Gamma Format 1).

Crucial Advice:

• Refer to Garmin Manuals: Always follow the official G5, GPS 175, and GAD 29 installation manuals for exact pinouts, wiring diagrams, and configuration steps.
• Expert Help: This is an advanced project; consider consulting or hiring an avionics technician, as incorrect wiring can damage components or prevent certification.

 

[eaglen92ce]

Yes that should work. I have a GTN650 through the GAD29 and an SL30 on serial port to teh G5, either radio CDI can be selected for display on my G5. The only minor bummer is the radio hooked to the serial port will be called NAV 1 on the G5, and at least when I set mine up could not be changed. That means my GTN650 which I consider NAV1, displays as NAV2 on the G5. Maybe Garmin will "fix" this at some point.