... poleNote:Must guard against exceeding 50V,so as not to damage the module2,GND:DC power cathode3,A+, ... high or working current over 2.7A, fix the module on big metal shell , or use axle flows fan ... dispels the heat, to make the module run reliably for a long time.2, Half ... machinery is connected with driver , users are apt to connect the phase by mistake, thus would damage the ...