Its called a TopCNC TC55H. The outputs have + and - terminals so I figure they are open collector and you supply whatever voltage your drives require. The CNC3020 driver box is blue in color (no part numbers) appears to have driver board for the four axis with the toshiba stepper driver chips. Don't have any wiring diagrams so this is way more complicated than necessary.
What I am building is a waste water sampler. Use fourth axis to drive a peristaltic pump to pull a sample, move to test tube location, dose a sample into the test tube, reverse to pump out to clear out the sample tube, pause for a period of time, repeat. All G0 moves in X,Y and maybe Z.