Does anyone know how I can connect a solid state relay to k-flop. I think I'm good with the 110v connection to the relay. I don't have a clue what to do on the dc side. The relay can drive up to 40 amps. It is a 3-30v input. The dc side has two screw terminals one is + and the other is -.
I will be using it to turn a spindle on and off. I need to know what to hook to the + and -.

Thanks
Ben