Closed-loop precision
Feedback-based position control improves repeatability and helps prevent lost steps during dynamic motion or changing loads.
SPAI57RC 57 mm Integrated Closed-loop Stepper Motor
All-in-One Integrated Closed-loop Stepper Motor
SPAI57RC is a 57 mm integrated closed-loop stepper motor with RS-485 communication, 24–48 VDC supply and up to 5 A peak output for compact automation systems.
Positioning accuracy
High torsional rigidity and constant torsional backlash over the entire gearbox service life ensure consistently high performance
Compactness
High torque density thanks to high performance and short design
Low maintenance
Highest quality standards for a long service life and extended maintenance intervals
Technical data
Built for compact precision
Closed-loop motion control in a 57 mm integrated package
The 57 mm integrated closed-loop stepper motor combines motor, drive electronics and communication in one compact unit, reducing wiring effort and helping machine builders save valuable installation space.
Compact integration
The 57 mm motor, drive and controller share one housing, simplifying cabinet architecture and reducing component count.
Flexible connectivity
RS-485 communication provides a practical interface for networked motion control in compact automation systems.
Engineering information
Technical data
Electrical ratings and motor configurations for the AI57RC integrated closed-loop stepper motor.
57 mmFrame size
24–48 VDCSupply voltage
5 ApeakMaximum output current
RS-485Communication
Electrical
Electrical operating parameters
| Parameter | Unit | Value |
|---|---|---|
| Peak output current | A | 5 |
| Input supply voltage | V | 24–48 |
| Single-ended input signal voltage | VDC | 5–24 |
| Maximum output signal logic current | mA | 10 |
| Maximum output signal pull-up voltage | VDC | 24 |
Motor options
AI57RC model selection
Four motor configurations provide holding torque options from 0.6 to 2.0 N·m.
| Model | Current (RMS A) | Resistance (Ω) | Inductance (mH) | Holding torque (N·m) | Rotor inertia (g·cm²) | Body length (mm) | Weight (g) |
|---|---|---|---|---|---|---|---|
| HD-57H042H-1004 | 1 | 4.2 | 11 | 0.6 | 140 | 42.5 | 460 |
| HD-57H051H-2004 | 2 | 1.5 | 4.4 | 1.0 | 240 | 51.5 | 640 |
| HD-57H065H-3004 | 3 | 0.9 | 3.6 | 1.7 | 350 | 65.5 | 860 |
| HD-57H076H-4004 | 4 | 0.6 | 2.4 | 2.0 | 480 | 76.5 | 1060 |
Integrated architecture
More motion capability. Less cabinet complexity.
The integrated design reduces the number of separate components, shortens field wiring and gives designers a clean platform for compact precision axes.
- Motor, drive electronics and closed-loop control in one unit
- Compact front interface for power, I/O and communication
- Suitable for distributed machine architectures
Application fields
Designed for precision equipment with limited installation space
The compact integrated format is suited to automation systems that need accurate positioning, simplified wiring and flexible machine communication.
Laboratory automation
Compact sample handling, dispensing and analytical instruments.
Precision inspection
Camera positioning, metrology stages and optical adjustment axes.
Semiconductor handling
Space-constrained transfer, alignment and auxiliary motion systems.
Compact robotics
End effectors, lightweight axes and distributed automation modules.
System integration
Clear interfaces for faster machine design
Use the product drawings and electrical definitions as the basis for mechanical layout, harness design and controller communication planning.
Power supply24–48 VDC
Single-ended input signal5–24 VDC
CommunicationRS-485
Output logic limits10 mA / 24 VDC pull-up
Mechanical format57 mm integrated motor package
Discuss your compact motion requirement with our engineers.
Share your voltage, load, speed, communication and installation requirements for product selection and integration support.
Contact us
Would you like to learn more about our solutions?
We would be happy to advise you—personally, competently, and tailored to your requirements.
Perfection in a new dimension
Further Information
Short delivery times available for selected product configurations.
The TP+ HIGH TORQUE enables maximum torque density and maximum torsional rigidity—ideal for demanding applications with dynamic load changes and high positioning accuracy.
alpha Advanced Line gearboxes with increased durability and food-grade lubrication available.
The TP+ for coordinated pinion-rack systems for medium to high requirements. Typical areas of application in wood, plastic, and composite processing, in machining centers, or in automation.
With cynapse® and smart services, you can unleash the full potential of your drive system: sensor data is processed, visualized, and analyzed intelligently. Find out how the combination of gearboxes with cynapse® and our Smart Services can make your digital production faster, safer, and more efficient.
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