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Stepper motor driver SMD-4.2 - open frame version

SMD‑4.2 - open frame version

Power supply 12 ‑ 24 VDC
Max. current per phase 1.3 - 4.2 А
Microstepping 1/1 - 1/128
Control methods STEP/DIR, analog input
Version open board without housing

The SMD-4.2 stepper motor driver is manufactured in a frameless design, in the form of an open board with mounting holes. There is also version of the driver in an open case with DIN clamp. The compact and lightweight driver is small in size and does not require much space at the installation site. The operation of the stepper motor with SMD-4.2 driver is characterized by low vibration and noise. The driver works with microstepping up to 1/256, provides high motor output torque. The driver has a FAULT output to indicate device status. The safety function STO (Safe Torque Off) ensures that the phases of the stepper motor are de-energized in case of emergency.

technical data

Technical data

Inputs STEP, DIR, ENABLE:  
High voltage level 5 - 12 VDC or 24 VDC
Low voltage level 0 - 1 VDC
Input current 0.5 mA
Maximum frequency of pulse STEP signal 200 kHz
Input SPD:  
Voltage range of the control analog signal 0.1 – 10 VDC
Input impedance 30 Ohm
Input current 1 mA
Output «FAULT» parameters:  
Output type open collector
Маx. voltage 20 VDC
Max. load current 2 A
Resistance of closed contacts
in normal operation mode
no more than 0.045 Ohm

Description of the stepper motor SMD‑4.2 - open frame version

Stepper motor control methods:

  • Pulse position control

    Pulse position control of the stepper motor is provided by standard logic signals STEP/DIR and ENABLE.

  • Analog speed control

    Analog stepper motor speed control can be done in two ways:

    • external voltage signal 0 - 10 VDC;
    • built-in potentiometer

FAULT output

The output signal "FLT" is intended to monitor the state of the driver. In the normal state, the resistance between the "FLT" and "GND" terminals tends to infinity. In the event of an emergency, the resistance between the terminals is 0.045 ohms.

The output signal FLT is intended to monitor the state of the driver. In the normal state, the resistance between the FLT and GND terminals tends to infinity. In the event of an emergency, the resistance between the terminals is 0.045 ohms.

Connection of the stepper motor driver SMD‑4.2 - open frame version

Connection of the stepper motor driver SMD‑4.2 - open frame version

Connection of the stepper motor driver SMD‑4.2 - open frame version

Dimensions of stepper motor driver SMD-4.2 - open frame version

Dimensions of stepper motor driver SMD-4.2 - open frame version