SMD-4.2DIN ver.3

Stepper motor controller SMD-4.2DIN ver.3

Voltage 12 - 48 VDC
Max. current per phase 2.7 - 4.2 A
Microstepping 1/1 - 1/256
Control methods analog speed control,
pulse position control STEP/DIR
Size 116x100x23 mm

The stepper motor controller is designed to control motors with current per phase up to 4.2 A. This model provides 4 control methods: STEP/DIR positioning, speed or position 0..5 VDC analog control, constant speed rotation. The controller provides an excellent motor dynamics and high torque performance.

Technical data

Inputs STEP, DIR, ENABLE:  
High voltage level 5 - 12 VDC
Low voltage level 0 - 1 VDC
Input STEP resistance 3 kOhm, no less
Inputs DIR and ENABLE resistance 1 kOhm, no less
Input current of control
inputs STEP/START/STOP		 1.4 - 4 mA
Input current of control inputs DIR, EN 4 - 12 mA
Speed control signal voltage range 0.1 – 5 VDC
or 0.1 – 10 VDC
Input speed resistance 15 kOhm, no less
Current of control input SPD 1 mA
Outputs «FAULT» parameters:  
Signal type opto-coupler output
Маx. voltage 48 VDC
Max. load current 50 mA
Resistance 15 Ohm, no more

Dimensions SMD-4.2DIN ver.3

Dimensions SMD-4.2DIN ver.3

Description of the stepper motor controller SMD-4.2DIN ver.3

SMD-4.2DIN ver.3 provides the next options for stepper motor control:

  • Pulse position control by external signals;
  • Analog speed control mode:
    • Voltage signal 0 – 5 VDC;
    • Voltage signal 0 – 10 VDC;
    • Built-in potentiometer;
    • External potentiometer;

Depending on the task, the controller can be used in one of the control modes - pulse position control for implementation of positioning tasks, speed control with an analog signal - for tasks of accurately maintaining and regulating speed.

The pulse position control mode is implemented with standard control signals STEP and DIR. In pulse position control mode, it is possible to invert the enable signal ENABLE.

The analog speed control mode (by external or built-in potentiometer) or with analog voltage signal 0 – 5 V or 0 – 10 V provides start, stop, change of direction and smooth adjustment of the speed of rotation of the stepper motor without the possibility of precise positioning. The built-in generator is used as the controller that sets the pulses. The analog speed control mode is used in cases of simple movement (rotation) of a stepper motor or when the use of an external source of pulses "STEP" is unacceptable or impossible.

Examples of connecting a stepper motor driver SMD-4.2DIN ver.3 in pulse position control mode

SMD-4.2DIN connection

Connecting the driver to a logic signal source - open collector, NPN

SMD-4.2DIN connection

Connecting the driver to a logic signal source - open collector, PNP

Examples of connecting a stepper motor driver SMD-4.2DIN ver.3 in analog speed control mode

SMD-4.2DIN connection

Connecting discrete signals for start/stop and direction control in analog speed control mode - diagram 1

SMD-4.2DIN connection

Connecting discrete signals for start/stop and direction control in analog speed control mode - diagram 2

SMD-4.2DIN connection

Connecting discrete signals to control start/stop, direction and rotation enable in analog speed control mode - diagram 3

SMD-4.2DIN connection

Connecting an analogue speed control signal -
control with an external potentiometer

SMD-4.2DIN connection

Connecting an analogue speed control signal -
regulation by an external voltage source 0..5V or 0..10V

Alarm signal FAULT

The FAULT output signal is intended to monitor the state of the driver. In normal condition, the resistance between terminals “FA+” and “FA-” tends to infinity. When an emergency occurs, the resistance outputs “FA+” and “FA-” are closed.

SMD-4.2DIN connection
  • Signal type: optocoupler output
  • Max. voltage: 48 VDC
  • Max. current: 50 mA

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