nema17 2/4 phase stepper motor controller

Stepper Motor Controller:BL230

Match motor:2 or 4 Phases Stepper Motor( I ≤ 3A/Phase )
Number of Phase        2 or 4
Num. of Microstep      2
Max.Current            3A/Phase
Current Regulation     0.2-3A continuously adjustable
Operating Voltage      DC24-40V
Drive Mode             Constant current chopper

Terminals:(I/O PORTS) 
1.VCC:Power supply 20~36VDC 
NOTE: Never exceed 40V, to avoid damage to the module.
2.GND:VCC supply corresponds to the ground

7.CP IN+:Clock pulse input, optical coupling Positive input, rising edge.
8.CP IN-:Clock pulse input, optical coupling input negative terminal.
9.CW/CCW+:Direction of the motor control, optical coupling input positive terminal.

10.CW/CCW-:Direction of the motor control, optical coupling input negative terminal. 
11.REST+: Reset (motor off electricity), optical coupling input positive terminal.
12.REST-: Reset (motor off electricity), optical coupling input negative 

  Figure Dimensions (unit =mm):

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