Does your Dynon have a switch

[trib]

I've just installed and am currently wiring up a dynon D100. The manual says to install to a switched power supply. The power comes from the e-bus, which is controlled by the master switch. For those of you installing a dynon D100, is this what you are doing, or do you install an additional toggle switch in line?

[Jamie]

Hmm....don't they mean just wire it to the master switch?

I have my D-10A (same equipment, different screen) wired to my master switch and haven't had any problems yet.

[kentb]

It is not uncommon for an EFIS to get disturbed (after all it is a computer). The only sure way to clear it would be to turn if off and then back on.

If you have a switch for it you won't have to miss the use of the rest of you panel while doing this reset.

Kent

[MCA]

Originally Posted by trib

I've just installed and am currently wiring up a dynon D100. The manual says to install to a switched power supply. The power comes from the e-bus, which is controlled by the master switch. For those of you installing a dynon D100, is this what you are doing, or do you install an additional toggle switch in line?

Tim, maybe it's just sematics, but on traditionally-wired aircraft the e-bus should not be controlled directly by the master switch (which controls the battery contactor and the main bus). The e-bus is powered by both the main bus (via a diode) and an ebus switch or relay. Either way though, the main power to the Dynon can come from the switched bus of your choice and you don't need a switch just for the Dynon (IMHO). Hope that helps.

[trib]

Thanks for the quick replies guys. I do see your point in a separate switch being handy if you had computer issues.

Marc, I'm basically using the Z-11 layout and the master switch powers the e-bus by energizing the battery contactor. Master switch off- no power to bus. You mention the e-bus being powered from the main, but the diagram I have basically has the battery contactor supply both buses, simply teeing off the supply to the main bus. I did use the diode, just didn't mention it.

[N941WR]

Tim,

Typically the D180 and D100/D10 EMS's are wired to master so they are powered up before, during, and immediately after engine startup.

The D100 EFIS is your call. In my case, the D100 EFIS it is on my avionics master while the D10 EMS is on the main bus. (The schematic is on my web site.)

As for a switch, I have a pullable breaker for the D100 EFIS and D10 EMS, but since the EFIS has an internal battery, it can never truly be powered all the way down, like Kent suggests. BTW, the Dynon's are some of the most reliable computing devices I have every worked with. The only time I pulled the breaker on the D100 was to see what would happen to it in flight should it loose power. (It gave me a warning on the screen and with the push of a button it switched over to internal power, as designed.)

[Larco]

I used a push pull curcuit breaker off the main buss and am quite satisfied. Larry

[leeschaumberg]

As said the dynons are computers with stand bye power so trying to turn one off is hopeless. It has a hour METER in it so use an oil pressure switch to turn the dynons on. This way they are on when the engine runs and off when it is. The more switches you can eliminate the beter.

[jsharkey]

Originally Posted by trib

I've just installed and am currently wiring up a dynon D100. The manual says to install to a switched power supply. The power comes from the e-bus, which is controlled by the master switch. For those of you installing a dynon D100, is this what you are doing, or do you install an additional toggle switch in line?

For now mine is wired through the avionics/radio breaker switch with an in-line fuse. Seemed logical but would be interested to hear other options.
Jim Sharkey
RV6 - Finishing Up

[guccidude1]

I have both Dynons on the avionics master switch and switchbreakers that would allow me to turn off each seperately. I used switchbreakers for all the on/off equipment, push/pull on everything else. Dan