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- MPL-A320P-MJ72AA
- Servo Motor
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- 100 mm
- 3.7 kg
- Xiamen, China
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Product Overview
The Allen Bradley MPL-A320P-MJ72AA Servo Motor is a high-performance Kinetix MP-Series MPL low-inertia brushless AC servo motor designed for demanding industrial automation applications requiring exceptional positioning accuracy, rapid acceleration, and reliable continuous-duty operation. As part of the Rockwell Automation MP-Series MPL family, this servo motor is optimized for seamless integration with Allen Bradley Kinetix servo drive systems, delivering outstanding closed-loop control of position, speed, and torque.
The MJ72AA configuration features a multi-turn absolute encoder, a SpeedTEC right-angle 180° rotatable DIN connector, a keyed shaft extension, and no holding brake. Designed for 230 VAC servo systems, the motor incorporates a 100 mm frame size, a 50.8 mm magnet stack length, and a 5000 rpm rated speed. The multi-turn absolute encoder continuously records shaft position over multiple revolutions, eliminating the need for homing after power restoration and significantly reducing machine startup time.
With a 100 mm frame size and an approximate weight of 3.7 kg, the MPL-A320P-MJ72AA provides an excellent balance of compact construction, high torque density, and dynamic performance. The low-inertia rotor enables rapid acceleration and deceleration while maintaining excellent speed stability and positioning repeatability.
The servo motor is widely used in packaging machinery, industrial robotics, CNC machining centers, semiconductor manufacturing equipment, electronic assembly systems, pharmaceutical production lines, automated material handling systems, printing machinery, and high-speed production equipment.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Model | MPL-A320P-MJ72AA |
| 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 |
| Magnet Stack Length | 50.8 mm |
| Rated Speed | 5000 rpm |
| Continuous Output Power | 1.3 kW |
| Continuous Stall Torque | 3.05 Nm |
| Peak Stall Torque | 7.91 Nm |
| Feedback Device | Multi-turn Absolute Encoder |
| Brake | No Brake |
| Shaft Type | Keyed 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-A320P-MJ72AA converts electrical energy supplied by a compatible Kinetix servo drive into highly accurate rotary motion while continuously transmitting multi-turn absolute encoder feedback for precise closed-loop motion control.
Typical Motion Control Architecture
Motion Controller
↓
Kinetix Servo Drive
↓
MPL-A320P-MJ72AA Servo Motor
↓
Mechanical Coupling
↓
Machine Axis
↓
Industrial Equipment
The integrated multi-turn absolute encoder continuously records the exact shaft position, rotational direction, and total number of revolutions. Unlike incremental encoder systems, the encoder retains position information after power loss, allowing the machine to resume operation without performing a reference homing sequence.
Primary operating functions include:
- Precision positioning
- Closed-loop speed regulation
- Dynamic torque control
- High-speed indexing
- Rapid acceleration and deceleration
- Multi-turn absolute position feedback
- Electronic cam synchronization
- Coordinated multi-axis motion
- Continuous position retention after power loss
- Reliable industrial motion control
The low-inertia rotor minimizes settling time while maximizing positioning accuracy, machine productivity, and operational efficiency.
Role in Industrial Control Systems
Within industrial automation systems, the MPL-A320P-MJ72AA functions as the precision motion actuator responsible for executing positioning commands generated by advanced motion controllers while continuously providing absolute position information.
Typical automation architecture:
ControlLogix PLC
↓
Motion Control Module
↓
Kinetix Servo Drive
↓
MPL-A320P-MJ72AA Servo Motor
↓
Precision Coupling
↓
Machine Axis
↓
Industrial Equipment
The servo motor delivers highly accurate, repeatable motion while the multi-turn absolute encoder improves machine availability by eliminating unnecessary homing procedures after power interruptions.
Industrial Applications
Packaging Machinery
Typical applications include:
- Cartoning machines
- Filling equipment
- Wrapping machines
- Labeling systems
- Pick-and-place systems
Robotics
Suitable for:
- Industrial robot arms
- SCARA robots
- Delta robots
- Six-axis robotic systems
- Automated assembly equipment
CNC Machinery
Frequently installed in:
- CNC machining centers
- Precision milling machines
- CNC lathes
- Grinding equipment
- Laser cutting systems
Semiconductor Manufacturing
Ideal for:
- Wafer handling equipment
- Precision positioning systems
- Inspection machines
- Electronic assembly equipment
- Cleanroom automation
Material Handling
Common applications include:
- Automated warehouses
- Conveyor positioning
- Sorting systems
- Palletizing equipment
- Automated storage systems
Pharmaceutical and Food Processing
Widely used in:
- Packaging machinery
- Filling systems
- Conveyor automation
- Inspection equipment
- Precision production lines
Installation and System Integration
Before installation, engineers should verify:
- Kinetix servo drive compatibility
- Mechanical mounting dimensions
- Shaft alignment
- Coupling compatibility
- Encoder cable integrity
- Motor power wiring
- Protective grounding
- Mechanical load capacity
- Environmental operating conditions
- Motion controller configuration
Recommended Installation Procedure
- Disconnect system power.
- Mount the servo motor securely.
- Align the motor shaft with the driven equipment.
- Install the coupling or transmission assembly.
- Connect the motor power cable.
- Connect the encoder feedback cable.
- Verify protective grounding.
- Restore system power.
- Configure motor parameters.
- Perform motor identification.
- Verify motor rotation.
- Tune servo parameters.
- Verify absolute encoder operation.
- Perform complete functional testing.
- Complete commissioning documentation.
Proper installation maximizes positioning accuracy, minimizes vibration, 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-A320P-MJ72AA | Precision servo motor |
| Motion Control Module | Multi-axis synchronization |
| EtherNet/IP Network | Industrial communication |
| PanelView HMI | Operator interface |
| Precision Coupling | Torque transmission |
| Ball Screw Assembly | Linear positioning |
| Industrial Power Supply | System power |
Recommended Alternative Models
| Model | Product Type | Typical Application |
|---|---|---|
| MPL-A320P-MJ72AA | AC Servo Motor | Multi-turn absolute encoder, no brake |
| MPL-A320P-MJ74AA | AC Servo Motor | Multi-turn absolute encoder with holding brake |
| MPL-A320P-HJ72AA | AC Servo Motor | Incremental encoder, no brake |
| MPL-A320P-SJ72AA | AC Servo Motor | Single-turn absolute encoder, no brake |
| Kinetix VP Series | AC Servo Motor | Advanced industrial motion control |
Key Advantages
- Compact 100 mm frame size
- Approximate weight 3.7 kg
- Low-inertia rotor for rapid dynamic response
- Rated speed of 5000 rpm
- Continuous output power of 1.3 kW
- Continuous stall torque of 3.05 Nm
- Peak stall torque of 7.91 Nm
- Integrated multi-turn absolute encoder
- Keyed shaft extension
- SpeedTEC quick-connect rotatable connector
- Eliminates homing after power restoration
- High positioning accuracy
- Seamless integration with Allen Bradley Kinetix servo drives
- Suitable for continuous industrial operation
Technical FAQs
What is the Allen Bradley MPL-A320P-MJ72AA?
The MPL-A320P-MJ72AA is a Kinetix MP-Series MPL low-inertia AC servo motor equipped with a multi-turn absolute encoder for high-precision industrial motion control.
What is its primary function?
Its primary function is to provide accurate closed-loop control of position, speed, and torque while continuously retaining absolute shaft position information.
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?
No. The MPL-A320P-MJ72AA is supplied without a holding brake.
What is the advantage of a multi-turn absolute encoder?
The encoder permanently records shaft position over multiple revolutions, eliminating the need for homing after power interruptions, reducing startup time, and improving machine productivity.
Which drive systems are compatible?
It is designed for use with compatible Allen Bradley Kinetix servo drive systems.
Which industries commonly use this servo motor?
Typical industries include packaging, robotics, semiconductor manufacturing, CNC machining, pharmaceutical production, food processing, electronics manufacturing, and automated assembly.
Where is the servo motor typically installed?
It is commonly installed on robotic axes, CNC machines, conveyor positioning systems, packaging equipment, semiconductor machinery, automated warehouses, and precision manufacturing equipment.
Why choose a low-inertia servo motor?
A low-inertia servo motor provides faster acceleration, shorter settling time, improved positioning accuracy, higher machine throughput, and more efficient overall motion control.
Conclusion
The Allen Bradley MPL-A320P-MJ72AA 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 absolute encoder, a 5000 rpm rated speed, a keyed shaft extension, and a SpeedTEC quick-connect interface, it delivers exceptional positioning accuracy, rapid dynamic response, and dependable long-term performance.
With an approximate weight of 3.7 kg, the MPL-A320P-MJ72AA 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, EtherNet/IP communication systems, and industrial automation equipment, it enhances machine productivity, eliminates unnecessary homing procedures, improves positioning performance, and supports long-term industrial reliability.