... ,B+,B-:Stepping motor other winding5,PUL+,PUL -:Stepping pulse input+5V (Rising edge effective , rising edge duration >10μS)6 ... ,DIR +,DIR-:Stepping motor direction input, voltage level touched off,high towards, low reverse7,ENA+,ENA-: motor free .NOTE ... jump5,installation dimension Stepping motor driver,1.3A-4.5A,high quality and reasonable price