MSM01c – Stepper motor controller

MSM01c – Stepper motor controller

  • for two phase stepper motors with low resistance and inductance
  • two-level control signals STEP, DIR, MICRO, ENABLE
  • independently selectable level of control signals 5V or 24V
  • wide range of power supply voltage 18–30 VDC
  • power supply voltage of power part up to 60 VDC
  • PWM current control for each motor winding
  • selectable current 1,8–10 A
  • current reduction of stopped motor
  • microstepping 4 or 16
  • microstepping can be switched during run


MSM01c is module for driving two-phase stepper motor with low resistance and inductance.

Module is controlled by four two-level control signals:

  • STEP – change of signal level makes one microstep in direction determined by DIR signal
  • DIR – defines motor direction
  • MICRO – function is selectable by jumper
    • 1) Switches microstepping 4/16 during motor run
    • 2) Reduces motor current to 1/2 (microstepping is selected by jumper)
  • ENABLE – Enables the power part

Level of control signals is selectable independently for each signal, 24 V or 5 V.

Unit contains two independent PWM current controllers which controls current amplitude in each winding. Maximal current amplitude is selectable by jumpers in 6 levels 1.8–10 A. In power reduction mode, the current is decreased to 1/2 of selected maximal amplitude. This can be used for power reduction when motor is stopped.

Technical parameters

Control part:

  • Power supply voltage: 18–30 VDC
  • Current consumption: max. 100 mA @ 12 V, 30 mA @ 30 V
  • Control signals: four two-level control signals (STEP, DIR, MICRO, ENABLE)
  • Level of control signals:
    • Level L: max. 8 V for 24V level, max. 1.6 V for 5V level
    • Level H: min. 16 V for 24V level, min. 3.3 V for 5V level
    • Input current for level H: max. 6 mA
  • Microstepping: selectable 4/16
  • Motor current:
    • 1.8 A, 2.5 A, 3.75 A, 5 A, 7.5 A, 10 A
  • Frequecy of control signals: max. 30 kHz

Power part

  • Power supply voltage: max. 60 VDC
  • Max. load: depends on power supply voltage of power part, selected current and temperature. Higher load needs additional cooling.