Closed-loop precision
Feedback-based position control improves repeatability and helps prevent lost steps during dynamic motion or changing loads.
28 mm Integrated Closed-loop Stepper Motor
Integrated Closed-loop Stepper Motor
Compact 28 mm closed-loop stepper motor integrating drive electronics, RS-485 and configurable I/O for precise motion in limited spaces.
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 28 mm integrated package
Motor, drive electronics and communication are combined in one compact unit, reducing wiring effort and helping machine builders save valuable installation space.
Compact integration
The 28 mm motor, drive and controller share one housing, simplifying cabinet architecture and reducing component count.
Flexible connectivity
RS-485 communication and configurable digital I/O support straightforward integration into compact automation systems.
Engineering information
Technical data
Core electrical and interface information is organized below for faster system evaluation and mechanical integration.
28 mmCompact frame size
12–24 VDCSupply voltage
RS-485Communication
Configurable I/OMachine interface
Electrical
Electrical operating parameters
Values transcribed from the product specification drawing.
| Parameter | Unit | Minimum | Typical | Maximum |
|---|---|---|---|---|
| Continuous output current | Apeak | — | — | 1.4 |
| Supply voltage | VDC | 12 | 24 | 24 |
| Logic input voltage | V | 3.3 | 5 / 24 | 24 |
| Logic input current | mA | 5 | — | 10 |
Mechanical
Envelope and mounting
| Parameter | Value |
|---|---|
| Frame width | 28 mm |
| Motor body diameter | Ø22 mm |
| Rear section length | 27 mm |
| Interface housing length | 23 mm |
| Mounting holes | 2 × Ø2.8 mm |
| Motor body length | L, configuration-dependent |
Connections
Power and status indication
| Interface | Pin / Color | Definition |
|---|---|---|
| Power port | Pin 1 | +DC |
| Power port | Pin 2 | GND |
| Status indicator | Green | Power indicator |
| Status indicator | Red | Warning indicator |
I/O definition
12-pin input, output and RS-485 interface
Connector signal allocation for machine wiring and communication.
| Pin | Signal | Type | Description |
|---|---|---|---|
| 1 | A-GND | Analog ground | Analog signal reference ground |
| 2 | A-IN | Analog input | Analog command input |
| 3 | 3.3V-OUT | Power output | 3.3 V auxiliary output |
| 4 | IN1 | Digital input | Single-ended input port 1 |
| 5 | OUT1 | Digital output | Single-ended output port 1 |
| 6 | IN2 | Digital input | Single-ended input port 2 |
| 7 | OUT2 | Digital output | Single-ended output port 2 |
| 8 | IN-COM | Input common | Common terminal for digital inputs |
| 9 | OUT-COM | Output common | Common terminal for digital outputs |
| 10 | 485-GND | Communication | RS-485 reference ground |
| 11 | 485-B | Communication | RS-485 B line |
| 12 | 485-A | Communication | RS-485 A line |
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 supply12–24 VDC
Logic input levels3.3 V / 5 V / 24 V
CommunicationRS-485
Machine interfaceConfigurable digital inputs and outputs
Mechanical format28 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.
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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.