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STR DC Stepper Motor Drive

Part Number

Configured Part Number is shown.

STR DC Stepper Motor Drive:Related Image
The STR series stepper drives are compact, powerful, digital step & direction drives available in three power ranges: 2.2 A/phase (STR2), 4.5 A/phase (STR4) and 8 A/phase (STR8). These drives are great for OEM applications requiring basic step & direction control of a 2-phase step motor.

STR drives feature advanced microstepping performance and sophisticated current control with anti-resonance. Anti-resonance electronically damps motor and system resonances, which improves motor smoothness and torque over a wide speed range.

Each STR step motor drive operates in either step & direction or pulse/pulse control mode. Selecting between these two modes is done by moving a jumper located under the cover of the drive. Each STR drive can microstep up to 20,000 steps/rev with a 1.8º step motor (1/100 step), and can even microstep the step motor when the command pulses are low resolution. This feature is called Microstep Emulation. All drive setup is done via dip or rotary switches on the side of the drive, including motor selection, running current, idle current, and step resolution.

STR stepper drives are available with a large family of compatible 2-phase step motors, selected to optimize performance of both the drive and motor.
Three versions STR2, STR4 & STR8 capable of driving motors from HT08 to HT34.
• Switch Sellectable Parameters
• Anti-Resonance
• Microstepping
•Misrostep Emulation
•Self Testing


Part NumberSupply VoltageControl ModesOutput CurrentCommunication PortEncoder Feedback
STR212 to 48 VDCStep & Direction0.3-2.2 A/PhaseNoneNone
STR424 to 48 VDC0.25-4.5 A/Phase
STR824 to 75 VDC0.5-8.0 A/Phase
Amplifier TypeDual H-bridge, 4 QuadrantStep Input5-24V Sinking*5- 24V Differential*
Current Control4 State PWM at 16kHz4 State PWM at 20kHzDirection Input5-24V Sinking*5- 24V Differential*
Output Current / Phase0.3-2.2A, peak of sine0.25-4.5A, peak of sine0.5-8.0A, peak of sineEnable Input5-24V Sinking5- 24V Differential
Power SupplyExternal 12-48 VDCExternal 24-48 VDCExternal 24-75 VDCFault Output30V/80mA Max, optically isolated, sinking or sourcing.
ProtectionOver-voltage, Under-voltage, Motor / Wiring ShortsDrive/ Motor Settings 
Idle Current50% or 90% or running current, switch selescableMotor SelectDip SwitchesRotary Switch
Modes of OperationStep (pulse)& Direction or CW/CCW (pulse-pulse), jumper selectableRunning CurrentDip switch selectable 100%, 90%, 80% ro 70%
Step ResolutionSwitch Selectable, 200, 400, 2000, 5000, 12800 or 20000 Steps/RevIdel CurrentDip switch selectable 50% or 90%
Anti-Resonance (Electronic Damping)Raises the system damping ratio to eleminate midrange instability
and allow stable operation throughout the speer range and
improves setteling time.
Dip Switch setting for range of load-to-motor inertia ratio
Load Inertia RatioDip switch selectable (0-4X or 0-5X)
Step SizeSwitch Selectable, 200, 400, 2000, 5000, 12800 or 20000 Steps/Rev
Step Pulse TypeStep (pulse)& Direction or CW/CCW (pulse-pulse), jumper selectable
Step Noise FliterJumper 150kHz, 2MHz.Dip switch selectable, 150 kHz or 2MHz
Self TestDip switch setting for automaticly rotating step motor to test connectionsSelf TestDip switch selectable, Rotate motor back and forth
Mocrostep EmulationPerforms high resolution stepping by synthesizing fine microsteps from
coarse steps. Available from Full (200 Smooth) and Half (400 Smooth)
Step resolutions.
Weight133 g.306 g
Operation Temperature0 to 85° C Interior of electronics section
Ambient Temperature0 to 50° C Drive must be mounted to a suitable heatsink
   Humidity90% Non-condensing
   Agency ApprovalsCE (EMC): EN 61800-3:2004, CE (LVD): EN 61800-5-1:2003
Part Number
Part NumberVolume DiscountDays to Ship

13 Days

5 Days

14 Days


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Basic Information

Category Drive Voltage Specifications DC Programming Step & Direction or CW/CCW
Communication Ports N/A Closed Loop Feedback No

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