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Stepper motor driver SMD-2.8DIN

Voltage 12 - 24VDC
Max. current per phase 1.3 … 2.8 A
Microstepping 1/1 - 1/256
Control methods STEP/DIR
Size 116x100x23 mm

The driver is intended for small size stepper motors with current per phase up to 2.8 A. The control method is standard STEP/DIR. The driver provides smooth and exact positioning. Holding motor current can be reduced in order to make lower heating and energy save, this function can be switched on or off by a customer.

technical data

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 input STEP 1,4 - 4 mA
Input current of control inputs DIR и ENABLE 4 - 12 mA
Output «FAULT» parameters:  
Signal type opto-coupler output
Maximum voltage 48 VDC
Maximum load current 50 mA
Resistance at close contact 100 Ohm, no more

FAULT output

The «FAULT» output signal is designed to monitor the state of the driver and allows you to track the occurrence of abnormal situations during operation. In the event of an emergency, the resistance between the FAULT terminals tends to infinity.

  • Signal type — optocoupler output
  • Maximum voltage — 48 VDC
  • Maximum load — 50 mA
  • Resistance of closed contacts in normal operation mode — no more than 100 Ohm
FAULT output

Dimensions of SMD-2.8DIN

Connection of the stepper motor driver SMD-2.8DIN

The driver is controlled by standard signals STEP, DIR and ENABLE. The motor motion is allowedwhen a signal is present at the «ENABLE» input (this signal can be inversed if needed). Displacement of a stepper motor by one step or microstep is carried out along the edge of the «STEP» signal, in the direction specified by the «DIRECTION» signal. Setting the maximum current of the motor phases and the microstepping mode is carried out by microswitches located on the front panel of the driver

The stepper motor driver can be connected to a PNP or NPN open collector logic signal source. High-level voltage signals 5‑12 V can be used without additional connections. 24 VDC control signals can be applied using a 3 kΩ current-limiting resistor.

SMD-2.8DIN Stepper motor drivers STEP/DIR

An example of a driver connection diagram with a source of logic signals of the open collector type (common anode).

SMD-2.8DIN Stepper motor drivers STEP/DIR

An example of a driver connection diagram with a source of logic signals of the open collector type (common cathode).