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Allen-Bradley MPL-A220T-HJ74AA Servo Motor – MP-Series Low-Inertia 230V AC Rotary Servo Motor with Incremental Encoder and 24V DC Holding Brake, 75 mm Frame Size
Product Overview
The Allen-Bradley MPL-A220T-HJ74AA Servo Motor is a high-performance MP-Series Low-Inertia Brushless AC Rotary Servo Motor developed for demanding industrial motion control applications. As part of the Rockwell Automation Kinetix motion product family, this servo motor delivers exceptional positioning accuracy, rapid acceleration, and reliable torque output for automated production equipment requiring high-speed, closed-loop motion control.
The MPL-A220T-HJ74AA features a 230 V AC voltage class, 75 mm IEC metric frame size, 50.8 mm magnet stack length, 6000 RPM rated speed, a 2000-line incremental encoder, a keyed shaft, a SpeedTEC right-angle DIN quick-connect interface, and an integrated 24 V DC holding brake. This configuration makes it particularly suitable for vertical-axis applications, indexing systems, robotics, packaging machinery, CNC equipment, and precision positioning systems where both accurate motion control and load holding capability are required.
Designed to operate seamlessly with Allen-Bradley Kinetix servo drives, the motor offers excellent dynamic response, high repeatability, and stable operation under continuous industrial workloads. Its low-inertia rotor minimizes settling time and enables faster machine cycles, helping manufacturers improve production efficiency and product quality.
With a compact 75 mm frame size and an approximate weight of 2 kg, the MPL-A220T-HJ74AA provides an excellent balance between performance, installation flexibility, and long-term reliability.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley |
| Model | MPL-A220T-HJ74AA |
| Product Series | MP-Series MPL |
| Product Type | Rotary Servo Motor |
| Motor Type | Low-Inertia Brushless AC Servo Motor |
| Rated Voltage | 230 V AC |
| Rated Speed | 6000 RPM |
| Frame Size | 75 mm |
| Magnet Stack Length | 50.8 mm |
| Feedback Device | 2000-Line Incremental Encoder |
| Shaft Type | Keyed Shaft |
| Brake | Integrated 24 V DC Holding Brake |
| Connector Type | SpeedTEC Right-Angle DIN Connector (180° Rotatable) |
| Mounting | IEC Metric Flange |
| Frame Size | 75 mm |
| Weight | Approximately 2 kg |
Function and Working Principle
The Allen-Bradley MPL-A220T-HJ74AA converts electrical energy supplied by a compatible servo drive into precise rotary motion while continuously transmitting encoder feedback for closed-loop motion control.
Typical Motion Control Architecture
Motion Controller
↓
Allen-Bradley Kinetix Servo Drive
↓
MPL-A220T-HJ74AA Servo Motor
↓
Mechanical Transmission
↓
Industrial Equipment
During operation, the servo motor performs the following functions:
- Executes precise positioning commands
- Controls rotational speed accurately
- Delivers stable output torque
- Provides real-time incremental encoder feedback
- Supports rapid acceleration and deceleration
- Improves machine positioning accuracy
- Holds loads securely through the integrated brake
- Increases overall machine productivity
The integrated 24 V DC holding brake locks the motor shaft when servo power is removed, preventing unintended movement and improving operational safety for vertical-axis systems.
Role in Industrial Motion Control Systems
Within an industrial automation system, the MPL-A220T-HJ74AA serves as the primary motion actuator responsible for executing high-precision motion commands.
Its primary responsibilities include:
- Precise position control
- Speed regulation
- Continuous torque output
- Closed-loop encoder feedback
- Multi-axis synchronization
- Vertical load holding
- High-repeatability positioning
- Improved production efficiency
Its combination of low inertia and integrated brake makes it suitable for applications requiring both dynamic performance and safe load retention.
Industrial Applications
Packaging Machinery
Widely used in:
- Filling machines
- Labeling equipment
- Cartoning systems
- Wrapping machines
- High-speed conveyors
Robotics
Suitable for:
- Six-axis robots
- Pick-and-place robots
- Assembly robots
- Collaborative robots
- Material handling systems
CNC Machinery
Applications include:
- CNC machining centers
- Milling machines
- Precision cutting systems
- Automated machining cells
- Multi-axis positioning equipment
Electronics and Semiconductor Manufacturing
Typical applications include:
- PCB assembly equipment
- Semiconductor manufacturing
- Precision inspection systems
- Electronic component placement
- Wafer handling equipment
Printing and Converting
Ideal for:
- Digital printing presses
- Label production equipment
- Web handling machinery
- Paper converting systems
- Roll-to-roll processing
Pharmaceutical and Food Processing
Suitable for:
- Filling equipment
- Packaging machinery
- Conveyor automation
- Inspection systems
- Automated production lines
Installation and System Integration
Before installation, engineers should verify:
- Servo drive compatibility
- Motor power supply
- Encoder cable condition
- Brake wiring
- Mechanical alignment
- Shaft coupling installation
- Grounding requirements
- Cooling and ventilation
Recommended Installation Procedure
- Disconnect system power.
- Mount the servo motor securely.
- Install the shaft coupling.
- Connect the motor power cable.
- Connect the incremental encoder cable.
- Connect the 24 V DC brake supply.
- Configure the Kinetix servo drive.
- Perform motor identification.
- Tune servo parameters.
- Verify brake operation.
- Test motor rotation.
- Complete commissioning.
Compatible System Components
| Component | Function |
|---|---|
| Allen-Bradley Kinetix Servo Drive | Motion control |
| Logix PLC | Machine control |
| Motion Controller | Position command generation |
| Servo Power Cable | Motor power transmission |
| Encoder Feedback Cable | Motion feedback |
| 24 V DC Brake Supply | Brake operation |
| Mechanical Coupling | Torque transmission |
| Planetary Gearbox | Speed reduction |
| HMI Panel | Operator interface |
| EtherNet/IP Network | Industrial communication |
Recommended Alternative Models
| Model | Product Type | Recommended Application |
|---|---|---|
| MPL-A220T-HJ74AA | Servo Motor with Incremental Encoder & Brake | Precision motion control |
| MPL-A220T-HJ72AA | Servo Motor without Brake | Horizontal-axis applications |
| MPL-A220T-EJ74AA | Servo Motor with High-Resolution Encoder | Higher positioning accuracy |
| MPL-A220T-VJ74AA | Servo Motor with Multi-Turn Absolute Encoder | Absolute positioning |
| Kinetix VP Servo Motors | Premium Servo Motor | Advanced motion systems |
Key Advantages
- MP-Series low-inertia brushless AC servo motor
- 230 V AC operation
- Compact 75 mm frame size
- 6000 RPM rated speed
- 2000-line incremental encoder
- Integrated 24 V DC holding brake
- SpeedTEC quick-connect interface
- Keyed shaft configuration
- Excellent dynamic response
- Compatible with Allen-Bradley Kinetix servo drives
- Approximate weight of 2 kg
Technical FAQs
What is the Allen-Bradley MPL-A220T-HJ74AA?
The MPL-A220T-HJ74AA is an MP-Series low-inertia brushless AC rotary servo motor equipped with a 2000-line incremental encoder and an integrated 24 V DC holding brake.
What is its rated voltage?
The motor operates on 230 V AC.
What is the rated speed?
The rated operating speed is 6000 RPM.
What feedback device does this servo motor use?
It uses a 2000-line incremental encoder for closed-loop motion control.
Does the motor include a holding brake?
Yes. It features an integrated 24 V DC electromagnetic holding brake for secure load holding.
What is the frame size?
The servo motor has a 75 mm IEC metric frame size.
Which servo drives are compatible?
It