Originally Posted by MemphisPapa
I'm looking for some help finishing the connections for my Curtis 1238R controler. Pin #9 says it is the Pedal Interlock and goes to the "N.C. Throttle Switch" then on to the the menu button that returns to Pin #10 on the controler. What is the Pedal Interlock? What is it for and why do I need it? What is the N.C Throttle Switch?
I'm in my first build and am so close to the first run. I just am not sure about this one. Thanks ahead for the help.
The common throttle pot assembly is the Curtis PB-6. It comes with a microswitch activated when you lift (throttle off position). This is called an interlock. When the throttle is off, the controller gets a signal from the interlock switch and inhibits the motor.
N.C. means Normally Closed for the switch contacts. The microswitch on the PB-6 is SPDT and can be wired for NC or NO (Normally Open).
Do you need it????? Maybe. If you have the programmer, you can disable the function. If not, and your controller has been programmed for it, then you could hard wire it.
I use it on the brake pedal instead of the throttle. That way if the throttle gets stuck, the brake switch turns off the motor. On the brake, use a NO instead of NC switch.
And the return isn't thru the menu button, it is to B+. The menu button return is also B+.
You should be able to download the complete manual from the Curtis website. See page 12.