Thanks for the response. The programming and fear of not making a reliable machine work is my big problem.If its the programming that bothers you, an IDX mx-8 multiplexer could probably work. You would have your work cut out for you making the interface, as you would likely have to add 4 relays that match the wash arming signal voltage for the inputs into the mx-8, and maybe whatever relay was necessary to tie into the hopper signal (didn't read the manual)...
That's why I took the time to write and test a ladder program, to eliminate the original controls and run the hopper by a programmable relay
Do you have a point?