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- MPL-A320H-MK74AA
- Servo Motor
- USA
- 100 mm
- 3.7 kg
- Xiamen, China
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Product Overview
The Allen Bradley MPL-A320H-MK74AA Servo Motor is a high-performance Kinetix MP-Series MPL low-inertia brushless AC servo motor engineered for demanding industrial automation applications requiring exceptional positioning accuracy, rapid dynamic response, and reliable continuous-duty operation. As a member of the Rockwell Automation MP-Series MPL family, this servo motor is designed for seamless integration with Kinetix servo drives, providing precise closed-loop control of position, speed, and torque for advanced motion systems.
The MK74AA configuration incorporates a multi-turn high-resolution absolute encoder, a SpeedTEC right-angle 180° rotatable DIN connector, a keyless shaft extension, and an integrated 24 V DC holding brake. This combination makes the motor particularly suitable for vertical-axis applications, high-precision positioning systems, and machinery requiring secure load holding during power loss or emergency stop conditions.
Featuring a compact 100 mm frame size and an approximate weight of 3.7 kg, the MPL-A320H-MK74AA delivers an excellent balance of power density and installation flexibility. The low-inertia rotor enables rapid acceleration and deceleration while maintaining outstanding positioning repeatability and smooth torque output.
Designed for the 230 V AC servo platform with a maximum rated speed of 3500 rpm, this motor is widely used in packaging machinery, robotics, CNC machine tools, semiconductor equipment, pharmaceutical production lines, printing systems, material handling equipment, and automated manufacturing cells.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Model | MPL-A320H-MK74AA |
| Product Series | Kinetix MP-Series MPL |
| Product Type | AC Servo Motor |
| Motor Type | Low-Inertia Permanent Magnet Brushless Servo Motor |
| Voltage Class | 230 VAC |
| Frame Size | 100 mm |
| Rated Maximum Speed | 3500 rpm |
| Feedback Device | Multi-turn High-Resolution Absolute Encoder |
| Brake | 24 V DC Holding Brake |
| Shaft Type | Keyless Shaft Extension |
| Connector Type | SpeedTEC Right-Angle 180° Rotatable DIN Connector |
| Mounting Standard | IEC Metric Flange |
| Cooling Method | Natural Convection |
| Weight | Approximately 3.7 kg |
Function and Working Principle
The MPL-A320H-MK74AA converts electrical power supplied by a compatible Kinetix servo drive into highly accurate rotary motion while continuously transmitting absolute encoder feedback for precise closed-loop control.
Typical Motion Control Architecture
Motion Controller
↓
Kinetix Servo Drive
↓
MPL-A320H-MK74AA Servo Motor
↓
Keyless Coupling
↓
Machine Axis
↓
Industrial Equipment
The integrated multi-turn absolute encoder continuously reports shaft position to the servo drive, enabling accurate regulation of position, speed, and torque. The built-in 24 V DC holding brake securely locks the motor shaft whenever drive power is removed, making the motor ideal for vertical lifting systems and gravity-loaded applications.
Primary operating functions include:
- Precision positioning
- Closed-loop speed regulation
- Dynamic torque control
- High-speed indexing
- Rapid acceleration and deceleration
- Smooth low-speed operation
- Multi-turn absolute position feedback
- Electronic cam synchronization
- Coordinated multi-axis motion
- Secure load holding through the integrated brake
The low-inertia rotor minimizes settling time while the keyless shaft design improves torque transmission accuracy and reduces backlash.
Role in Industrial Control Systems
Within industrial automation systems, the MPL-A320H-MK74AA serves as the precision motion actuator responsible for executing positioning commands while safely retaining loads whenever machine motion is stopped.
Typical automation architecture:
ControlLogix PLC
↓
Motion Control Module
↓
Kinetix Servo Drive
↓
MPL-A320H-MK74AA Servo Motor
↓
Precision Keyless Coupling
↓
Machine Axis
↓
Industrial Equipment
The servo motor provides highly accurate and repeatable motion while the integrated holding brake enhances machine safety and positioning reliability.
Industrial Applications
Packaging Machinery
Typical applications include:
- Cartoning machines
- Filling equipment
- Wrapping machines
- Labeling systems
- Pick-and-place equipment
Robotics
Suitable for:
- Industrial robot arms
- SCARA robots
- Delta robots
- Six-axis robotic systems
- Automated assembly cells
CNC Machinery
Frequently installed in:
- CNC machining centers
- Milling machines
- Precision lathes
- Laser cutting systems
- Grinding equipment
Semiconductor and Electronics Manufacturing
Ideal for:
- Wafer handling systems
- PCB assembly equipment
- Precision positioning systems
- Inspection machinery
- Cleanroom automation
Material Handling
Common applications include:
- Vertical lifting axes
- Conveyor positioning
- Automated storage systems
- Warehouse automation
- Sorting equipment
Pharmaceutical and Food Processing
Widely used in:
- Packaging lines
- Filling systems
- Inspection equipment
- Conveyor automation
- Precision production machinery
Installation and System Integration
Before installation, engineers should verify:
- Kinetix servo drive compatibility
- Mechanical mounting dimensions
- Keyless coupling compatibility
- Shaft alignment
- Encoder cable connections
- Motor power wiring
- Brake wiring
- Protective grounding
- Mechanical load capacity
- Motion controller configuration
Recommended Installation Procedure
- Disconnect system power.
- Securely mount the servo motor.
- Install the keyless locking assembly or coupling.
- Align the motor shaft with the driven mechanism.
- Connect the motor power cable.
- Connect the encoder feedback cable.
- Connect the 24 V DC brake wiring.
- Verify protective grounding.
- Restore system power.
- Configure motor parameters.
- Perform motor identification.
- Test motor rotation.
- Verify holding brake operation.
- Tune servo parameters.
- Complete commissioning documentation.
Proper installation maximizes positioning accuracy, ensures reliable brake performance, and extends motor service life.
Compatible System Components
| Component | Function |
|---|---|
| Allen Bradley Kinetix Servo Drive | Servo motor control |
| ControlLogix PLC | Motion controller |
| CompactLogix PLC | Machine automation |
| MPL-A320H-MK74AA | Precision servo motor |
| Motion Control Module | Multi-axis synchronization |
| EtherNet/IP Network | Industrial communication |
| PanelView HMI | Operator interface |
| Keyless Locking Assembly | Torque transmission |
| Ball Screw Assembly | Linear positioning |
| Industrial Power Supply | System power |
Recommended Alternative Models
| Model | Product Type | Typical Application |
|---|---|---|
| MPL-A320H-MK74AA | AC Servo Motor | Absolute encoder with keyless shaft and holding brake |
| MPL-A320H-MK72AA | AC Servo Motor | Keyless shaft without brake |
| MPL-A320H-MJ74AA | AC Servo Motor | Keyed shaft with holding brake |
| MPL-A320H-MJ72AA | AC Servo Motor | Keyed shaft without brake |
| Kinetix VP Series | AC Servo Motor | Advanced industrial motion control |
Key Advantages
- Compact 100 mm frame size
- Low-inertia rotor for rapid dynamic response
- Rated maximum speed of 3500 rpm
- Integrated multi-turn high-resolution absolute encoder
- Precision keyless shaft extension
- Built-in 24 V DC holding brake
- SpeedTEC quick-connect 180° rotatable connector
- High positioning accuracy
- Seamless integration with Allen Bradley Kinetix servo drives
- Rugged industrial construction
- Suitable for continuous industrial operation
- Approximate weight 3.7 kg
Technical FAQs
What is the Allen Bradley MPL-A320H-MK74AA?
The MPL-A320H-MK74AA is a Kinetix MP-Series MPL low-inertia AC servo motor featuring a multi-turn high-resolution absolute encoder, a keyless shaft extension, and an integrated 24 V DC holding brake for precision industrial motion control.
What is its primary function?
Its primary function is to provide precise closed-loop control of position, speed, and torque while securely holding the load whenever the motor is not energized.
What is the frame size?
The motor features a 100 mm frame size.
What is the approximate weight?
The servo motor weighs approximately 3.7 kg.
Does this model include a holding brake?
Yes. The MPL-A320H-MK74AA includes an integrated 24 V DC holding brake designed to securely retain the motor position during power loss or shutdown.
What is the advantage of a keyless shaft?
A keyless shaft provides excellent torque transmission, improved concentricity, reduced backlash, and simplified installation when used with precision locking assemblies.
Which drive systems are compatible?
It is designed for use with compatible Allen Bradley Kinetix servo drives and Logix-based motion control systems.
Which industries commonly use this servo motor?
Typical industries include packaging, robotics, semiconductor manufacturing, CNC machining, pharmaceutical production, food processing, material handling, printing, and automated assembly.
What type of feedback does the motor use?
The motor uses a multi-turn high-resolution absolute encoder, providing accurate position feedback while retaining multi-revolution position information.
Where is the servo motor typically installed?
It is commonly installed on robotic axes, vertical lifting systems, CNC machines, conveyor positioning systems, semiconductor equipment, and precision manufacturing machinery.
Conclusion
The Allen Bradley MPL-A320H-MK74AA Servo Motor is a compact, high-performance motion solution engineered for demanding industrial automation applications. Featuring a 100 mm frame size, a low-inertia rotor, a multi-turn high-resolution absolute encoder, a keyless shaft extension, an integrated 24 V DC holding brake, and a SpeedTEC quick-connect interface, it delivers outstanding positioning accuracy, rapid dynamic response, and dependable long-term performance.
With an approximate weight of 3.7 kg, the MPL-A320H-MK74AA integrates easily into advanced machine designs while providing reliable precision motion control. When combined with compatible Allen Bradley Kinetix servo drives, ControlLogix PLCs, motion controllers, and EtherNet/IP communication systems, it enhances machine productivity, improves operational safety, and supports long-term industrial reliability.