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Garmin 496 Wiring

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Albert Gardner

Joined: 10 Jan 2006
Posts: 455
Location: Yuma, AZ

Posted: Thu Jul 05, 2007 2:10 pm Post subject: Garmin 496 Wiring

Has anyone wired up their 496 and solved these problem I have encountered? I

am installing my 496 using the Air-Gizmos adaptor and Garmin's Power/Data

cable. I want to connect the 496 to my Tru-Trak autopilot, the Dynon 180

EFIS, and the PMA8000 audio panel. The Garmin cable has 9 wires while the

manual indicates only 7 (page 158). The manual says the yellow and blue

wires are "Data in and out" but the tag on the cable labels these as "Port 1

in and out". In addition, the cable has 2 wires not mentioned in the manual,

a green and violet pair labeled "Port 2 in and out".



Questions:

1. What signal will be present on the Voice output? I want the XM radio

signal to go to the audio panel, is this the right output to wire into an

entertainment input? Do any of the alarm outputs appear here?



2. The PMA8000 has 4 unswitched audio inputs available. I wired the Dynon

EFIS and EMS alarms into #1. I plan on wiring the Garmin alarm output into

#2. I am assuming that XM music will not be present on this 496 output.



3. Would you wire the Dynon EFIS and EMS alarms together and into a single

audio input (like Dynon suggests) or split them and wire into different

audio inputs, IE, #1 (EFIS) and #2 (EMS) with the Garmin going into #3?



4. What is the difference between the 496 output labeled Port 1 and Port 2?

I can find no mention of ports in the manual. Is there different information

on them? In the setup screens on the 496 I don't see any mention of Ports. I

am assuming I should wire the Port 1 in and out to the autopilot but the

Dynon EFIS needs that input also. Do I send it to both or should Port 1 go

to one and Port 2 to the other? 



5. Apparently the 496 can tune the SL-30 Nav/Comm. If I choose to do this,

the SL-30 need a data output from the 496. How is this done?



6. There is an audio mini-jack on the back of the 496 in addition to the

wire in the wire in the cable assembly. If I wire the Alarm output into a

audio panel audio input and the Voice output into an entertainment input

have I separated the two signals so that the pilot gets the alarms and the

passengers get only the XM radio signal? I assume then that this jack is

only used when I remove the 496 from the plane.



Albert (lost in space) Gardner

Yuma, AZ

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stein(at)steinair.com
Guest

Posted: Thu Jul 05, 2007 3:10 pm Post subject: Garmin 496 Wiring

Hi Albert,



I'll take these in order the best I know how.



1) The voice output is useless (in my opinion, so don't hook it up)...even

the alarm output is marginally usefull - but that's just my personal

opinion.

2) Run the XM output from the 496 (use a stereo jack in the music output

port from the GPS - not part of the power/data cable) into an "entertainment

input" for the PMA.

3) Put the Dynon's together as they suggest.

4) Leave port 2 alone for now.  Just split the port 1 wire to the various

components.

5) When you set the serial port 1, you choose "Aviation In/NMEA & VHF OUT".

6) You'll need that jack to send the music to the audio panel.  In the

PMA8000, the Entertainment 1 is for front seaters and/or passengers and

Ent#2 is for passengers only. You can decide how to configure them by

pressing certain buttons on the panel - which will dictate who can hear what

when!  Basically we suggest wiring the XM to to ENT #1 unless you're using

it for something else.  We normally install the ENT#2 jack for the rear

seaters in case they bring along their own IPOD or DVD player or such.



Hope that helps!



Cheers,

Stein.



[quote]--

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Albert Gardner

Joined: 10 Jan 2006
Posts: 455
Location: Yuma, AZ

Posted: Thu Jul 05, 2007 3:46 pm Post subject: Garmin 496 Wiring

Hey Stein, I would have called you but I thought you were all on vacation

this week. Thanks for the info, it was mucho needed. BTW, I think the

air-Gizmo bracket is going to work fine, it really makes a nice setup just

below the PMA8000 and above the SL-30 and 40. 

Albert Gardner

Yuma, AZ

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RV-10 N991RV

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