It seems to be manufactured by DongGuan Tsiny Motor Industrial Co. but no documentation for it.
Found a pic of the bottom of the PCB and sketched a schematic of the control input, but I can't see the top-side traces well enough.
It's a bit weird because the MOSFET driver opto-coupler TLP250 gets its power across the 20V zener. I can't see where the cathode goes, if to power or what.
It looks like grounding TB2 pin 1 (goes to zener anode) might be RUN, by providing power to the MOSFET drive opto-coupler.
TB2 pin 2 (+) voltage sends something else as a command to the MCU, or is a return for the 24V control input?