Com/Intercom Wiring Questions...

[Mark P.]

Wiring the radio and intercom seems to be kicking my butt. Mostly because Dynon does not do a good job explaining things in the install manual.

In the pic below, you will see a chart from the install manual. It is page 2-3 for reference.

Question 1: If you look at the red box I've drawn on the photo, I'm wondering what I need to do here. "Radio 1 Audio Input". What is that?? Is it something I need?

I'm only installing one radio so I'm assuming I can ignore anything that says, "Radio 2.

How about "Radio 1 Mic Out" and "Radio PTT"? Do I need those if I'm not installing a separate microphone other than the push to talk button on the stick?

Question 2: Regarding the "Music In" section outlined in green. In the posted photo below, the SV-INTEROM-2S is shown on the left. The Music pins (24, 11, 18) are shown going to a 3.5mm jack. But my intercom already has a 3.5mm music in jack on the on the face of the instrument. So what is this wiring diagram showing? A separate 3.5mm jack perhaps incase I want a second one located somewhere else in the plane?

Question 3: Regarding the Aux muting and non-muting section outlined in blue. Again, what IS this? Is it something I need? What would I install that would connect here? The only thing I can think of is maybe the EFIS-isn't there a voice that comes on and says, "TRAFFIC, TRAFIC"? I'm guessing that would be a non-muting connection? I just have no idea what to wire here or what wire from the EFIS would connect here.

I hope these aren't stupid questions but I've been studying these comm/intercom wiring diagrams and there are some parts of it that I feel should be explained better. Thank you in advance. :-?

 

[mrdaud]

Cruzer - First, and most important, the Dynon can be used with any radio source, so the pin labels are somewhat generic. The Dynon radio out, pin 10 goes to the Radio audio in pin 14 on the intercom. In my case, I use a Dynon radio going to a PM1000 intercom. So pin 10 on the Dynon goes to my "audio in" on the intercom. I'm thinking the Dynon harness already has this wired. Yes, one radio, ignore radio 2. Again, radio MIC out should be part of the Dynon harness. If making your own harness, yes you would need to interconnect those pins. You will need to run your stick PPT to pins 10 an 2 on the intercom in parallel with the jack as shown in the diagram. Shielded wire not needed for that.
With regard to the Music, the panel jack is for any portable input, whereas, the back panel input (in your green) is for a permanent install such as a panel mount stereo. Panel jack overrides permanent mount. Aux might be any separate audio input such as an independent gear warning audio or even other music inputs. Not used much in my experience. Skyview audio is inputed through pins 19 & 6 so you don't need to do anything if using the Dynon harness.
This might be more confusing, but I have attached a schematic used on my install with a Com 425, Garmin radio from my 430, and the PM1000 intercom. Disregard the connectors in the middle, it is just a switching module between radio 1 & 2 as I have no audio panel. Just follow the wires from the Dynon com. I also use a summing module for my inputs to ensure impedance matching, but I think you can also disregard that. You can see there really aren't that many connections. Hope this helps.

 

[mrdaud]

Cruzer, if you are still confused, send me a PM note with your email and I will help you out off line.