... DIR +,DIR-:Stepping motor direction input, voltage level touched off,high towards, low reverse7,ENA+,ENA-: motor free .NOTE ... or working current over 2.7A, fix the module on big metal shell , or use axle flows fan ... wiring of electrical machinery is a mistakeSwitch Choice: (“ON=0,OFF=1”)1,Microstepping choice: SW500000000111111SW601010101010101SW700110011001100SW800001111000011Micro1/21/41/81/161 ...