I've got a forklift with a partially functional motor controller. As I've got a bit of experience with electronic engineering (as opposed to electrical), I have a few questions that I was hoping to get some help with.
The current setup looks like this:
The original controller is very hard to get hold of. A close alternative with very similar specs is available. However, it doesn't have the "FWD Input" or "REV Input". For the original controller, the internal block diagram is as follows:
The new controller is as follows:
The contactors that the "FORWARD" and "REVERSE" control are Albright DC182.
I guess, my question is, what might the "F/R Contactor Driver" (in the block diagram) do? Because as far as I can tell, the contactors works by connecting completing the circuit across the coils.
Any help would be greatly appreciated.