Brand:Allen Bradley PLC Item No.:MPL-A420P-MJ72AA Product Origin:USA Product Dimensions:Frame Size: 115 mm Product Weight:4.3 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Allen-Bradley MPL-A420P-MJ72AA Servo Motor is an MP-Series low-inertia motor developed for industrial motion systems that demand responsive and repeatable movement. With a 115 mm frame size, it offers a compact motor package for automated equipment where machine space and dynamic performance must be carefully balanced.
Unlike a conventional motor used primarily for continuous rotation, a servo motor operates as part of a coordinated motion system. The servo drive controls the motor while feedback information allows the control system to monitor actual movement. This closed-loop arrangement is what enables accurate speed, torque, and position control.
The low-inertia characteristics of the MPL-Series are particularly valuable in machinery with frequent motion changes. In a packaging machine, for example, the motor may accelerate rapidly, settle at a target position, stop, and immediately begin another movement. Reducing rotor inertia can help the system respond efficiently to these repeated commands.
Similar requirements occur in assembly machinery, indexing equipment, printing systems, and automated material handling. In these environments, servo performance can directly influence cycle time, positioning accuracy, and overall machine productivity.
Mechanical installation deserves equal attention. Motor mounting rigidity, shaft alignment, coupling condition, load inertia, and mechanical backlash can all affect servo performance. A properly functioning motor may still produce positioning errors if the mechanical system is poorly aligned.
Electrical compatibility is also critical. The MPL-A420P-MJ72AA should be paired with a suitable servo drive and feedback interface. When replacing an existing motor, technicians should verify the complete catalog number rather than selecting a replacement solely from the frame size.
For maintenance teams, an exact MP-Series replacement can be particularly valuable when an established machine needs to return to production quickly. Preserving the existing motor family can reduce unnecessary modifications and make commissioning more straightforward.
For OEMs and system integrators, this servo motor provides a compact option for automated machinery where controlled acceleration, repeatable positioning, and reliable closed-loop motion are key requirements.
Technical Specifications
Parameter
Specification
Manufacturer
Allen-Bradley
Product Family
MP-Series
Model
MPL-A420P-MJ72AA
Product Type
Servo Motor
Motor Series
MP-Series Low-Inertia
Frame Size
115 mm
Motor Technology
Permanent Magnet Servo Motor
Application
Industrial Motion Control
Feedback
Servo Feedback
Cooling
Natural Convection
Mounting
Industrial Servo Motor Mounting
Shaft Configuration
Model Specific
Brake
Configuration Specific
Connector Configuration
Model Specific
Dimensions
Frame Size: 115 mm
Weight
4.30 kg (9.48 lb)
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These models can be considered when comparing MP-Series servo motor configurations for compatible automation systems. Electrical characteristics, feedback, shaft configuration, and servo-drive compatibility should be verified before selecting an alternative.
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The Allen-Bradley MPL-A420P-MJ72AA Servo Motor combines a compact 115 mm frame with the responsive characteristics of an MP-Series low-inertia servo design. It is a suitable choice for automated machinery requiring precise closed-loop motion, rapid acceleration, and repeatable positioning, while also offering a practical replacement option for compatible Allen-Bradley motion-control systems.
Applications
The Allen-Bradley MPL-A420P-MJ72AA Servo Motor is an MP-Series low-inertia servo motor designed for industrial automation systems where responsive motion, repeatable positioning, and precise speed control are essential. Its 115 mm frame provides a compact solution for machinery that needs reliable servo performance without excessive mechanical footprint.
This motor is well suited to automated packaging equipment, assembly machines, indexing systems, material-handling machinery, printing and converting equipment, machine tools, and other production systems involving coordinated motion.
The low-inertia construction makes the MPL-A420P-MJ72AA particularly useful for applications with frequent acceleration and deceleration. When the machine repeatedly changes speed or direction, the motor can respond quickly to commands from the associated servo drive, helping maintain smooth and repeatable machine cycles.
It is also a practical candidate for maintenance and replacement work on existing Allen-Bradley MP-Series motion systems. Using a correctly matched servo motor can reduce mechanical changes and simplify the process of restoring an established automation system to normal operation.
For OEM equipment, the motor can provide a strong combination of compact construction and dynamic response. Proper selection should nevertheless include the servo drive, feedback arrangement, mechanical load, coupling, and required duty cycle rather than relying on frame size alone.
Advantages
Low-inertia servo construction
The motor's low-inertia design supports rapid changes in speed and direction, making it appropriate for machines with demanding positioning cycles and repeated acceleration or deceleration.
Compact 115 mm frame
The 115 mm frame size provides a practical balance between motor performance and mechanical integration, particularly where machine space is limited.
Precise closed-loop motion
When paired with a compatible servo drive and feedback system, the motor supports closed-loop regulation of position, velocity, and torque for demanding automated processes.
Fast acceleration response
Low rotor inertia helps the motor react efficiently to changing motion commands. This can be especially useful for indexing, pick-and-place, and synchronized production operations.
Suitable for repetitive machine cycles
The motor is designed for dynamic servo applications in which rapid movement and repeatability are more important than simple fixed-speed operation.
MP-Series platform compatibility
As part of the Allen-Bradley MP-Series family, the MPL-A420P-MJ72AA can be used in compatible Allen-Bradley motion-control architectures where the motor and drive configuration are correctly matched.
Useful for system replacement
For existing MP-Series installations, using the correct replacement motor can help preserve established machine mechanics and reduce unnecessary control-system modifications.
Industrial automation flexibility
The motor can be incorporated into a wide range of automated equipment, from packaging and assembly systems to material handling and precision production machinery.
Technical FAQs
1. What type of motor is the MPL-A420P-MJ72AA?
The MPL-A420P-MJ72AA is an Allen-Bradley MP-Series low-inertia servo motor intended for closed-loop industrial motion-control applications.
2. What is the benefit of the motor's low-inertia design?
Low rotor inertia allows the motor to accelerate and decelerate quickly when controlled by a compatible servo drive. This can improve dynamic response in repetitive positioning applications.
3. Does the motor require a servo drive?
Yes. The motor is intended to operate with a compatible servo drive that provides controlled electrical power and processes the motor's feedback signals.
4. What should be verified before connecting this motor to a servo drive?
The motor catalog number, winding characteristics, feedback configuration, voltage and current requirements, connector arrangement, and supported motor profile of the servo drive should all be verified.
5. Which industrial applications are suitable for this motor?
Packaging, assembly, indexing, printing, converting, material handling, machine tools, and other automated machinery requiring controlled and repeatable movement are suitable application areas.
6. Can this servo motor be used for frequent reversing?
Yes, servo motors are designed for dynamic motion profiles that can include frequent acceleration, deceleration, and reversing. The actual duty cycle and peak torque requirements must remain within the system's rated limits.
7. What can cause inaccurate positioning?
Possible causes include incorrect feedback signals, poor servo tuning, mechanical backlash, excessive load inertia, coupling problems, incorrect scaling, or inappropriate motion parameters.
8. What should be checked if the motor produces abnormal vibration?
Check servo-loop tuning, feedback wiring, mechanical alignment, coupling condition, load inertia, acceleration settings, and motor mounting. Incorrect control-loop settings can cause oscillation even when the motor is mechanically sound.
9. Why is feedback important in a servo system?
Feedback provides the controller with actual motor position or speed information. The servo drive uses this information to correct motor behavior and maintain the commanded motion profile.
10. Can this model be replaced by another 115 mm MP-Series motor?
Not automatically. Motors with the same frame size may have different windings, feedback systems, shaft arrangements, connectors, and electrical characteristics. The complete motor and drive configuration should be checked before substitution.
