Fri Jan 27, 2023 12:18 pm
If your installation uses the HV-64P, those boards will accept +3 to +30 volts as the keying voltage. It isn't entirely clear from the documentation exactly where you would connect +12 volts and ground to the card. The instructions state "In cases where the Common of the Stop Sense switches and the Common of the Pistons is already connected to a Positive voltage, all that has to be done is to change the jumper on the Input Board to accept a Positive
Common".
How did you clean the rail and the contacts? You might want to try Caig Labs GN5S-2N Deoxit Gold G5 Contact Cleaner and Deoxidizer, a brush-on cleaner available on Amazon.
Ray