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- MPL-A320P-HJ74AA
- Servo Motor
- USA
- 100 mm
- 3.7 kg
- Xiamen, China
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Product Overview
The Allen Bradley MPL-A320P-HJ74AA Servo Motor is a high-performance Kinetix MP-Series MPL low-inertia brushless AC servo motor developed for demanding industrial automation applications requiring high-speed operation, precise positioning, and dependable continuous-duty performance. As part of the renowned Rockwell Automation MP-Series MPL family, this servo motor integrates seamlessly with Kinetix servo drive systems, providing outstanding closed-loop motion control for modern manufacturing equipment.
The HJ74AA configuration features a 2000-line incremental encoder, a SpeedTEC right-angle 180° rotatable DIN connector, a keyed shaft extension, and an integrated 24 V DC holding brake. Designed for 230 V AC servo systems, the motor incorporates a 100 mm frame size, a 50.8 mm magnet stack length, and a 5000 rpm rated speed, making it ideal for high-speed motion applications that also require reliable load holding during power-off conditions. The integrated holding brake enhances machine safety by preventing unwanted axis movement on vertical or gravity-loaded applications.
With a compact 100 mm frame size and an approximate weight of 3.7 kg, the MPL-A320P-HJ74AA delivers an excellent combination of power density, rapid acceleration, smooth torque output, and outstanding positioning repeatability. Typical applications include robotics, CNC machining centers, packaging machinery, semiconductor manufacturing equipment, pharmaceutical production lines, electronic assembly systems, printing machinery, automated material handling systems, and precision manufacturing equipment.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Model | MPL-A320P-HJ74AA |
| 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 (2.0 in.) |
| Rated Speed | 5000 rpm |
| Continuous Output Power | 1.3 kW |
| Continuous Stall Torque | 3.05 Nm |
| Peak Stall Torque | 7.91 Nm |
| Feedback Device | 2000-Line Incremental Encoder |
| Brake | 24 V DC Holding 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-HJ74AA converts electrical energy supplied by a compatible Kinetix servo drive into highly accurate rotary motion while continuously transmitting encoder feedback for precise closed-loop control.
Typical Motion Control Architecture
Motion Controller
↓
Kinetix Servo Drive
↓
MPL-A320P-HJ74AA Servo Motor
↓
Mechanical Coupling
↓
Machine Axis
↓
Industrial Equipment
The integrated 2000-line incremental encoder continuously monitors shaft position and rotational speed, providing real-time feedback to the servo drive. Based on this information, the drive precisely regulates motor current to achieve accurate position, speed, and torque control. The integrated 24 V DC holding brake automatically secures the motor shaft whenever drive power is removed, preventing unintended movement and improving equipment safety.
Primary operating functions include:
- Precision positioning
- Closed-loop speed regulation
- Dynamic torque control
- High-speed indexing
- Rapid acceleration and deceleration
- Smooth low-speed operation
- High-resolution incremental encoder feedback
- Electronic cam synchronization
- Coordinated multi-axis motion
- Secure load holding through the integrated brake
The low-inertia rotor minimizes settling time while maximizing productivity, positioning accuracy, and overall machine performance.
Role in Industrial Control Systems
Within industrial automation systems, the MPL-A320P-HJ74AA functions as the precision motion actuator responsible for executing positioning commands while maintaining reliable load retention whenever machine motion is stopped.
Typical automation architecture:
ControlLogix PLC
↓
Motion Control Module
↓
Kinetix Servo Drive
↓
MPL-A320P-HJ74AA Servo Motor
↓
Precision Coupling
↓
Machine Axis
↓
Industrial Equipment
The servo motor delivers fast, accurate, and repeatable motion while the integrated holding brake enhances operational safety and positioning stability, especially in vertical-axis applications.
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 systems
- Conveyor positioning
- Warehouse automation
- Automated storage systems
- 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
- Shaft alignment
- Coupling selection
- Encoder cable integrity
- Brake wiring
- Motor power wiring
- Protective grounding
- Mechanical load capacity
- 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.
- Connect the 24 V DC brake wiring.
- Verify protective grounding.
- Restore system power.
- Configure motor parameters.
- Perform motor identification.
- Verify motor rotation.
- Test 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-A320P-HJ74AA | 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-HJ74AA | AC Servo Motor | Incremental encoder, keyed shaft, holding brake |
| MPL-A320P-HJ72AA | AC Servo Motor | Incremental encoder, keyed shaft, no brake |
| MPL-A320P-MJ74AA | AC Servo Motor | Multi-turn absolute encoder with brake |
| MPL-A320P-SJ74AA | AC Servo Motor | Single-turn absolute encoder with 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 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 2000-line incremental encoder
- Built-in 24 V DC holding brake
- SpeedTEC quick-connect rotatable connector
- Keyed shaft extension
- High positioning accuracy
- Seamless integration with Allen Bradley Kinetix servo drives
- Suitable for continuous industrial operation
- Approximate weight 3.7 kg
Technical FAQs
What is the Allen Bradley MPL-A320P-HJ74AA?
The MPL-A320P-HJ74AA is a Kinetix MP-Series MPL low-inertia AC servo motor equipped with a 2000-line incremental encoder and an integrated 24 V DC holding brake for high-speed 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 drive power is removed.
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-A320P-HJ74AA includes an integrated 24 V DC holding brake, making it suitable for vertical-axis and gravity-loaded applications.
Which drive systems are compatible?
It is compatible with Allen Bradley Kinetix servo drive platforms designed for MP-Series MPL motors.
Which industries commonly use this servo motor?
Typical industries include packaging, robotics, semiconductor manufacturing, CNC machining, pharmaceutical production, electronics manufacturing, food processing, and automated assembly.
What type of feedback does the motor use?
The motor uses a 2000-line incremental encoder, providing high-resolution position and speed feedback for accurate servo control.
Where is the servo motor typically installed?
It is commonly installed on robotic axes, vertical lifting systems, CNC machines, conveyor positioning systems, packaging equipment, semiconductor machinery, and other precision manufacturing equipment.
Why is the integrated holding brake important?
The integrated holding brake prevents unintended axis movement during power loss or emergency stop conditions, improving equipment safety and protecting both machinery and operators.
Conclusion
The Allen Bradley MPL-A320P-HJ74AA 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 2000-line incremental encoder, a 5000 rpm rated speed, a 24 V DC holding brake, 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-HJ74AA 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, improves operational safety, and supports long-term industrial reliability.