... +,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 module ... automatically for electricity saving, the phase current of the winding of the electric3, The fault phase is protected ... Stepping motor driver,1.3A-4.5A,high quality and reasonable price