Wiring the UMA hall effect tach sensor question

[mikehoover]

Should the power wire from the UMA hall effect tach sensor be connected to the battery buss (always on), or the main buss? I would think the battery buss because you would want it to continue to work if you lose your master contactor. If that happened, the Dynon battery backup for the Skyview would continue to operate the Skyview system and the tach sensor would still operate (as long as the aircraft battery has juice). Will connecting it to the battery buss drain the battery when not flying because it is always on? Thanks!

 

[dynonsupport]

Re: Wiring the UMA hall effect tach sensor questio

If you have it hooked up to the battery, it will drain the battery slowly. Do you happen to know how many mA it draws? (is it in the UMA documentation, or can you find out from them?). If you can find that out, we can tell you whether it might be able to hop onto the 12V fuel flow output, which is SkyView battery backed up.

 

[mikehoover]

Re: Wiring the UMA hall effect tach sensor questio

I just received an email from UMA that their tach transducer "current draw is 10Ma @12VDC regulated."

Not sure what the Red Cube draws.

Thanks!

Mike

 

[dynonsupport]

Re: Wiring the UMA hall effect tach sensor questio

Good info. You can run that off the 12V fuel flow power without issue.

 

[mikehoover]

Re: Wiring the UMA hall effect tach sensor questio

Thanks for the help!

Just for future reference:

I was given this information about the Red Cube:

"8-30 VDC between RED (+) wire and BLACK (-) wire. @ 14 mA"

The original source of the information is from Flight Data System's website.