AC Request on Digital 4 Pin D17

Discussion and Support for MoTeC's M1 series ECUs

AC Request on Digital 4 Pin D17

Postby rayhall on Tue Aug 10, 2021 3:22 pm

Hello ,
I have my AC request wire connected to Digital 4 input (pin D17), When I turn on the AC my fool pedal signals go out of range. My AC Request is battery voltage +13.8 volts. I was told the voltage is too high for a digital input and the excess voltage was bled off to the +5v bus and messing with my FP range settings. Is this true. What is the solution'. All the other brand ECU I have used where +14 volt tolerant.
Ray.
rayhall
 
Posts: 87
Joined: Fri Jul 15, 2011 6:54 am

Re: AC Request on Digital 4 Pin D17

Postby David Ferguson on Wed Aug 11, 2021 1:31 am

I think you would be OK using a Universal Digital (UDig) input, they can handle a high voltage inputs and the pullup can be switched off (so won't affect the 3V or 5V supplies), unlike the Fixed Digital inputs that are designed for switches.
David Ferguson
Veracity Racing Data
Check out Shift RPM - https://shiftrpm.veracitydata.com
David Ferguson
Pro User
 
Posts: 999
Joined: Fri Nov 07, 2008 1:45 am
Location: Paso Robles, California


Return to M1 ECUs

Who is online

Users browsing this forum: No registered users and 9 guests