Introduction

The Allen-Bradley MPL-B420P-HK72AA Servo Motor is part of the MP-Series family of industrial servo motors developed for automated motion-control systems. It is designed for machines where precise, repeatable, and controlled movement is required.

The MPL-B420P-HK72AA has a 115 mm frame size and a specified weight of 4.30 kg (9.48 lb). These specifications are important when planning the motor mounting arrangement, mechanical support, and available installation space.

The motor can be used in packaging machinery, assembly equipment, material-handling systems, machine tools, robotics, printing equipment, and automated production lines. In a complete servo system, it operates with a compatible drive, feedback system, and motion controller to achieve the required motion profile.

For replacement applications, engineers should verify the complete catalog number rather than relying only on frame size. Electrical characteristics, feedback configuration, shaft arrangement, mounting interface, and drive compatibility should be confirmed before installation.

Technical Specifications

Specification	Details
Brand	Allen-Bradley
Product Series	MP-Series
Model	MPL-B420P-HK72AA
Product Type	Servo Motor
Motor Family	MPL-B Series
Frame Size	115 mm
Application	Industrial Motion Control
Feedback	Servo feedback system
Installation	Machine-mounted servo axis
Weight	4.30 kg (9.48 lb)

The 115 mm frame size should be checked against the machine's mounting interface and available space. The specified 4.30 kg weight should also be considered when evaluating mechanical support and moving-axis loads.

Recommended Related Models

Model	Product Type	Frame Size
MPL-B320P-HJ72AA	MP-Series Servo Motor	100 mm
MPL-B320P-HJ74AA	MP-Series Servo Motor	100 mm
MPL-B320P-HK72AA	MP-Series Servo Motor	100 mm
MPL-B320P-HK74AA	MP-Series Servo Motor	100 mm
MPL-B320P-MJ72AA	MP-Series Servo Motor	100 mm
MPL-B320P-MJ74AA	MP-Series Servo Motor	100 mm
MPL-B320P-MK72AA	MP-Series Servo Motor	100 mm
MPL-B420P-HJ74AA	MP-Series Servo Motor	115 mm

Popular Related Models

Model	Product Type
MPL-B310P-SJ74AA	Allen-Bradley Servo Motor
MPL-B310P-SK72AA	Allen-Bradley Servo Motor
MPL-B310P-SK74AA	Allen-Bradley Servo Motor
MPL-B320P-HJ72AA	Allen-Bradley Servo Motor
MPL-B320P-HJ74AA	Allen-Bradley Servo Motor
MPL-B320P-HK74AA	Allen-Bradley Servo Motor
MPL-B420P-HJ72AA	Allen-Bradley Servo Motor
MPL-B420P-HJ74AA	Allen-Bradley Servo Motor
MPL-B420P-HK72AA	Allen-Bradley Servo Motor

Applications

The MPL-B420P-HK72AA is suitable for a variety of industrial motion-control applications:

Application	Typical Function
Packaging Machinery	Indexing and synchronized movement
Assembly Equipment	Accurate positioning and repetitive motion
Material Handling	Controlled acceleration and axis movement
Machine Tools	Precision axis control
Robotics	Servo-driven machine axes
Printing Equipment	Speed and position synchronization
Automated Production Lines	Coordinated multi-axis movement
Special-Purpose Machinery	Closed-loop motion control

The motor is particularly useful in machines that require repeated acceleration, deceleration, positioning, and changes in operating speed.

Key Advantages

Accurate motion control
The MPL-B420P-HK72AA is intended for servo applications requiring controlled speed, torque, and position.

115 mm frame size
The specified 115 mm frame provides a defined mechanical footprint for machine design and replacement planning.

Dynamic servo response
Its servo architecture is suitable for motion profiles involving frequent acceleration, deceleration, indexing, and direction changes.

Industrial automation integration
The motor can be incorporated into a suitable Allen-Bradley motion-control architecture with compatible drive and controller equipment.

Repeatable machine operation
Closed-loop servo control enables consistent motion performance across repeated machine cycles.

Useful for replacement projects
The MPL-B420P-HK72AA can be considered for maintenance and replacement applications after confirming its complete electrical and mechanical compatibility.

Technical FAQs

1. What is the Allen-Bradley MPL-B420P-HK72AA?
It is an Allen-Bradley MP-Series servo motor designed for industrial motion-control applications.

2. What is the frame size of the MPL-B420P-HK72AA?
The specified frame size is 115 mm.

3. What is the main function of this servo motor?
It provides controlled rotary motion for automated equipment requiring accurate speed, torque, and positioning.

4. Can this motor be used for precision positioning?
Yes. With a compatible servo drive and feedback/control system, it can be used for repeatable positioning and coordinated machine movement.

5. Why is feedback important for servo control?
Feedback provides information about motor position and speed, allowing the drive and controller to regulate the commanded motion accurately.

6. Is the motor suitable for frequent acceleration and deceleration?
Servo motors are designed for dynamic motion profiles involving acceleration, deceleration, stopping, and direction changes, provided the application stays within the applicable operating limits.

7. How should the servo drive be selected?
The drive should be matched to the motor's electrical requirements, feedback configuration, control method, and mechanical load.

8. What should be checked before replacing this servo motor?
Verify the complete catalog number, mounting arrangement, shaft configuration, electrical characteristics, feedback interface, motor cables, and compatible servo drive.

9. What can cause servo motor faults?
Incorrect wiring, feedback errors, excessive mechanical loading, overheating, mechanical interference, improper tuning, and incorrect drive parameters can cause operational problems.

10. Does the motor require commissioning after installation?
Yes. The servo system should be configured, tested, and tuned as necessary before the machine is returned to normal production.

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