... .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 dispels ... wiring of electrical machinery is a mistakeSwitch Choice: (ON=0,OFF=1)1.Microstepping choice: SW500000000111111SW601010101010101SW700110011001100SW800001111000011Micro1/21/41/81/161 ...