RDAC XF anomoly?

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hmanvel
Posts: 1
Joined: Mon Dec 28, 2020 8:59 pm

RDAC XF anomoly?

Post by hmanvel »

I have two RDACs on my Defiant aircraft. I've been struggling off and on for a couple years trying to get fuel probes to read correctly. Today I did some more troubleshooting and discovered something odd, hoping someone can help me out. My forward RDAC in diagnostics shows zero voltage for items that are not being used (AUX1, AUX2, Coolant) However my rear Rdac in diagnostics shows close to 5 volts for all of the three items. The only difference between the two boxes is I am feeding fuel level signals to the rear unit, and at the time FL1 was showing close to 5 volts also. Would the fuel level signals bleed through to these unused channels? Or could it be a dip switch setting issue?
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sparxfly
Posts: 82
Joined: Mon Aug 31, 2020 5:57 pm
Location: Waikato, NZ
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Re: RDAC XF anomoly?

Post by sparxfly »

If you have pull-ups enable, an uused input will show close to 5V.
Stuart
NZ MGL dealer
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