... edge duration >10μS)6,DIR +,DIR-:Stepping motor direction input, voltage level touched off,high towards, ... low reverse7,ENA+,ENA-: motor free .NOTE:1, When ambient temperature is high ... a long time.2, Half current automatically: if control machine not send out signal in half second, ... the driver has a jump5,installation dimension Stepping motor driver,1.3A-4.5A,high quality and ...