GTX 327 avionics power on question

[apkp777]

I am installing my GTX 327. There is a connection for "avionics power on" that powers up the 327 when the avionics master is turned on. I want this function, but what do I do with the normal power feed?

Do I connect both both inputs to 14V?

Or, do I only use the avionics power on 14v input?

The install manual doesn't make this clear.

Thanks for you help!

 

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connect both

the unit is powered from pin 15 with fused protection for the current draw of the transponder. the avionics master -on- pin 1 is only a switch indicator and serves to signal the transponder to turn on with the last mode selected per note 5 in the wiring diagram. if your -on- switch (whatever you call it... avionics, xpder, radios, ...) also sends power to the transponder then feed both pins the same power signal. at least that is my take... i turned my master switch on for the first time last night and should have power to the transponder tested this weekend.

 

[apkp777]

That's what I was thinking. Seems like they could have made that more clear in the manual though. I plan to run both to the same power source.

 

[flickroll]

Hook em both up to 14v from your transponder breaker (or fuse). That's the way I wired mine and it works great. It's also the way my avionics shop wired it in my Bonanza a few years ago.

 

[apkp777]

Thanks, I will power up later today!