... Characteristics:1.DC power input type:24V~50VDC2.Output current:1.3A-4.5A3.Mircostepping:1(1.8º),1/2,1/4,1/8,1/16,1/32,1/64,1/128,1 ... to damage the module2,GND:DC power cathode3,A+,A-:Stepping motor one winding4,B+,B-:Stepping motor other winding5,PUL+,PUL -:Stepping ... effective , rising edge duration >10μS)6,DIR +,DIR-:Stepping motor direction input, voltage level touched off,high towards, low reverse7 ...