... DIR-:Stepping motor direction input, voltage level touched off,high towards, low reverse7,ENA+,ENA-: motor free . ... NOTE:1, When ambient temperature is high or working current over 2.7A, fix the ... OFF=1”)1,Microstepping choice: SW500000000111111SW601010101010101SW700110011001100SW800001111000011Micro1/21/41/81/161/321/641/1281/2561/51/101/251/ ... driver,1.3A-4.5A,high quality and reasonable price