The HYQD30-H0057 is a professional two-phase stepper motor driver subdivision Reversible precise control . Over-temperature protection , overcurrent protection. 3 DIP switches to select the file segments control ( 2,8,10,16,20,32,40,64 ) , three DIP switches to select the 6-speed current control ( 0.5A , 1A, 1.5A , 2A, 2.5A, 3A, 3.5A, 4A). Suitable for driving 42,57 , small 86 two-phase , four-phase hybrid stepping motor . Features ※ power to adapt to the AC and DC ※ current selected by the DIP switch * interface uses high-speed opto-isolation ※ eight kinds of segments adjustable ※ automatic and semi-liquid ※ anti - high-frequency interference ability ※ maximum pressure DC 50V input and output instructions 3.1, the signal input of the CP + : the pulse signal input side . The CP- : pulse signal input to the negative terminal . DIR +: the motor , reverse control the positive terminal . DIR-: the motor is reversed to control the negative side . EN +: the positive terminal of the motor off control . EN- : motor off to control the negative side . 3.2 , the motor windings are connected to A + : connecting the motor windings A + phase . A-: A- phase connecting the motor windings . B + : connect the motor windings B + phase . B-: Connect the motor windings B - phase . 3.3, the connection of the working power AC1, - AC2, then power : the range AC12 -30V , DC15 - 42V , can not exceed this range , otherwise the drive may not work correctly , or even damage the drive . To ensure the best working condition, recommended DC power supply voltage 24 -36V 18 -30V AC power supply voltage .