GPS Power (EFIS D37 pin 29)

[cbennet12]

Hi DYNON (and others),

I have been looking for but did not find the max amperage available on pin 29. It would be extremely convenient to power my ADSB-472 as well as my GPS 2020. Total draw is stated as 300mA for both In the HDX installation manual. Since THE ADSB-472 is useless in my installation if the only HDX screen goes out and the screen has a circuit breaker, this seems like a low risk option.

I respect the argument that anything drawing power should be fused but the GPS draws 100mA directly on pin 29, so it is not unprecedented even in DYNON documentation.

Regards,
Craig

 

[djones]

Craig,
You can't use the pin for GPS power to power the ADSB module. The GPS runs on 8 volts and ADSB is 12 volts

 

[cbennet12]

Craig,
You can't use the pin for GPS power to power the ADSB module. The GPS runs on 8 volts and ADSB is 12 volts

Well that‘s an important piece of info that I missed.

THANK YOU!
Craig