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Allen-Bradley MPL-B4540F-MJ22AA Servo Motor – Complete Technical Specifications, Product Introduction, Applications and Model Recommendations

1. Product Overview

The Allen-Bradley MPL-B4540F-MJ22AA is a permanent-magnet, low-inertia AC rotary servo motor designed for industrial motion-control applications that require accurate positioning, fast response, stable speed control, and reliable continuous operation.

The motor belongs to the MP-Series MPL low-inertia servo motor family and uses a 130 mm frame with a 4-inch, or approximately 101.6 mm, magnetic stack.

The MPL-B4540F-MJ22AA is rated for 3000 rpm and provides approximately 10.2 N·m of continuous stall torque and approximately 27.1 N·m of peak stall torque. Its motor-rated output is approximately 2.6 kW.

A major characteristic of the MJ22AA configuration is its multi-turn high-resolution encoder. The motor also uses a keyed shaft, does not include an integral holding brake, and uses a right-angle bayonet-style connector that can be rotated through approximately 180°.

This configuration was designed for industrial servo systems where precise feedback and repeatable motion are more important than the additional mechanical holding function provided by a brake-equipped motor.

The MPL-B4540F-MJ22AA is therefore particularly suitable for automated machinery, packaging equipment, indexing systems, assembly machines, material-handling equipment, machine tools, printing and converting machinery, and other applications requiring controlled rotary motion.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Servo Motors
Model	MPL-B4540F-MJ22AA
Motor Type	Permanent-Magnet Rotary Servo Motor
Construction	Brushless AC Servo Motor
Application Class	Industrial Motion Control
Voltage Class	460 V AC class
Frame Size	130 mm
Frame Classification	Frame 45
Magnetic Stack	4 inch / 101.6 mm
Rated Speed	3000 rpm
Maximum Speed	3000 rpm
Continuous Stall Torque	Approx. 10.2 N·m
Peak Stall Torque	Approx. 27.1 N·m
Rated Output	Approx. 2.6 kW
Feedback	Multi-turn high-resolution encoder
Shaft	Keyed shaft
Shaft Seal	No shaft seal
Brake	No integral brake
Connector	Bayonet connector
Connector Configuration	Right-angle
Connector Rotation	Approximately 180°
Mounting	IEC metric flange
Rotor Inertia	Approx. 0.00052 kg·m²
Approx. Motor Weight	8.6–8.9 kg
Typical Operating Temperature	Up to approximately 40 °C

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3. Detailed Technical Parameters

Electrical and Performance Parameters

Parameter	MPL-B4540F-MJ22AA
Model	MPL-B4540F-MJ22AA
Brand	Allen-Bradley
Product Family	MP-Series
Series	MPL Low-Inertia
Motor Type	Permanent-Magnet AC Rotary Servo Motor
Phase	3-Phase
Voltage Class	460 V AC
Rated Speed	3000 rpm
Maximum Speed	3000 rpm
Continuous Stall Torque	Approx. 10.2 N·m
Peak Stall Torque	Approx. 27.1 N·m
Rated Motor Output	Approx. 2.6 kW
Rotor Inertia	Approx. 0.00052 kg·m²
Feedback	Multi-turn high-resolution encoder
Shaft Configuration	Keyed shaft
Shaft Seal	No seal
Brake	No brake
Connector	Bayonet
Connector Position	Right-angle
Connector Rotation	180° rotatable
Mounting Flange	IEC metric
Frame Size	130 mm
Magnetic Stack Length	101.6 mm
Approx. Weight	8.6–8.9 kg
Insulation Class	Industrial servo motor insulation system
Typical Ambient Temperature	Approximately 0 to 40 °C

The exact weight can vary slightly depending on published configuration data and measurement method. A practical nominal value for the motor itself is approximately 8.6 kg, with some listings reporting approximately 8.9 kg.

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4. Dimensions and Mechanical Parameters

The MPL-B4540F-MJ22AA is based on the B4540F motor platform.

The model designation provides useful information about the physical configuration. The B4540F family uses a 130 mm frame and a 4-inch magnetic stack.

Mechanical Parameter	Specification
Model	MPL-B4540F-MJ22AA
Frame Size	130 mm
Frame Designation	Frame 45
Magnetic Stack	4 inch
Magnetic Stack Length	101.6 mm
Mounting Standard	IEC metric flange
Shaft Type	Keyed
Shaft Seal	None
Connector Style	Bayonet
Connector Orientation	Right-angle
Connector Rotation	Approximately 180°
Overall Installation Envelope	Depends on shaft projection, flange geometry and connector position
Motor Body Class	130 mm frame × 101.6 mm stack
Approx. Weight	8.6–8.9 kg

For machine replacement work, the 130 mm frame and 101.6 mm magnetic-stack dimensions should be treated as the principal mechanical reference points.

The exact overall motor length should be checked against the appropriate mechanical drawing when designing a new machine or replacing an existing motor because shaft projection, mounting flange dimensions, connector clearance, and cable routing can affect the final installation envelope.

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5. Motor Performance

The MPL-B4540F-MJ22AA provides approximately 10.2 N·m of continuous stall torque and approximately 27.1 N·m of peak stall torque.

This combination provides a useful balance between continuous mechanical output and short-duration acceleration capability.

The motor is rated for 3000 rpm, making it suitable for applications that require both torque and relatively high rotational speed.

Its low rotor inertia of approximately 0.00052 kg·m² is another important performance characteristic.

A low-inertia rotor allows the motor to respond quickly to changes in commanded speed and position. This is particularly useful in machinery with repeated acceleration and deceleration cycles.

For example, a packaging machine may repeatedly accelerate an axis, move to a precise position, decelerate, stop, and then immediately begin another motion cycle.

The low-inertia design is well suited to this type of operation.

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6. Multi-Turn High-Resolution Encoder

The “MJ” configuration is associated with a multi-turn high-resolution feedback arrangement.

This is an important feature of the MPL-B4540F-MJ22AA.

A multi-turn feedback system provides the servo system with detailed position information over multiple revolutions rather than only within a single revolution.

This can be particularly useful for machine axes that move through a large number of revolutions or require accurate position information throughout extended rotary travel.

Typical benefits include:

• High-resolution position feedback
• Accurate position control
• Repeatable machine movement
• Improved low-speed control
• Multi-revolution position tracking
• Precise indexing
• Coordinated multi-axis operation
• Reliable servo-loop feedback

The encoder allows the servo controller to compare commanded movement with actual motor movement and continuously adjust the motor’s operation.

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7. Keyed Shaft Configuration

Unlike some of the keyless-shaft MPL configurations, the MPL-B4540F-MJ22AA uses a keyed shaft.

A keyed shaft is a familiar mechanical interface for industrial machinery and can simplify the selection of compatible couplings, pulleys, gears, and other mechanical transmission components.

The keyed connection provides a positive mechanical interface between the motor shaft and the driven component.

This configuration can be useful in applications where the existing machine design already uses keyed shafts.

Typical applications include:

• Gearbox input shafts
• Timing-belt drives
• Pulley systems
• Rotary tables
• Indexing mechanisms
• Feed rollers
• Mechanical transmission systems

The coupling or driven component should always be selected according to the motor shaft dimensions, transmitted torque, operating speed, alignment requirements, and application duty cycle.

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8. No Integral Brake

The MPL-B4540F-MJ22AA does not include an integral motor brake.

This is an important selection consideration.

The non-brake configuration is often preferable when the machine does not require mechanical holding after the servo drive has removed motor torque.

The absence of a brake can also reduce the mechanical complexity and weight of the motor.

Applications that commonly use a non-brake configuration include:

• Horizontal positioning axes
• Rotary indexing systems
• Conveyor axes
• Feed mechanisms
• Packaging axes
• Printing axes
• Cutting systems
• Machine-tool auxiliary axes
• General automated machinery

If the machine has a vertical axis or another gravity-loaded mechanism that must remain stationary after servo torque is removed, a brake-equipped alternative should normally be considered instead.

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9. Bayonet Connector and Right-Angle Configuration

The MPL-B4540F-MJ22AA uses a bayonet connector configuration.

The connector is arranged in a right-angle configuration, which can make the motor easier to integrate into machinery with restricted cable-routing space.

The connector can be rotated through approximately 180°, providing additional flexibility during installation.

This is useful when:

• The motor is installed close to a machine frame.
• Cable routing space is limited.
• Adjacent equipment restricts connector orientation.
• The motor is mounted inside a compact enclosure.
• The machine requires a specific cable exit direction.

Proper connector installation is important because excessive mechanical stress on motor and feedback cables can cause intermittent faults or premature cable failure.

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10. Product Introduction

The Allen-Bradley MPL-B4540F-MJ22AA is a low-inertia permanent-magnet rotary servo motor intended for industrial motion-control systems.

It combines a 130 mm frame, 101.6 mm magnetic stack, 3000 rpm rated speed, approximately 10.2 N·m continuous stall torque, and approximately 27.1 N·m peak stall torque.

The motor uses a multi-turn high-resolution encoder, providing precise feedback for servo control systems.

Its keyed shaft is suitable for conventional industrial mechanical transmission systems, while the absence of an integral brake keeps the configuration focused on applications where a separate holding brake is not required.

The motor’s low rotor inertia is particularly useful in applications requiring repeated acceleration and deceleration.

The B4540F platform also provides a good balance between motor size and torque output, making it suitable for a wide range of automated production machinery.

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11. Main Advantages

11.1 Low-Inertia Design

The low-inertia design is one of the main advantages of the MPL-B4540F-MJ22AA.

The approximately 0.00052 kg·m² rotor inertia allows the motor to respond quickly to changes in speed and position commands.

This is valuable for high-cycle machinery where every motion sequence must be completed quickly and accurately.

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11.2 High Continuous Torque

The approximately 10.2 N·m continuous torque capability provides substantial continuous mechanical output for a 130 mm frame motor.

This makes the motor suitable for machine axes requiring sustained torque during normal operation.

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11.3 High Peak Torque

The approximately 27.1 N·m peak torque capability provides additional capacity for acceleration and short-duration load changes.

This can be useful when the machine has relatively high starting torque requirements or needs rapid acceleration.

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11.4 3000 rpm Rated Speed

The 3000 rpm speed rating makes the motor suitable for many medium- and high-speed industrial motion applications.

It provides a useful balance between speed and torque rather than focusing exclusively on very high rotational speed.

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11.5 Multi-Turn High-Resolution Feedback

The multi-turn high-resolution encoder is particularly useful for precision positioning applications.

It provides detailed feedback information for the servo control system and is suitable for applications requiring repeatable and coordinated motion.

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11.6 Keyed Shaft

The keyed shaft is a familiar and practical mechanical interface.

It can simplify replacement work on existing machinery that already uses keyed couplings, pulleys, gears, or other mechanical components.

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11.7 Compact 130 mm Frame

The 130 mm frame provides substantial motor performance without requiring an excessively large machine footprint.

This makes the motor useful where available installation space is limited.

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11.8 No-Brake Configuration

The absence of an integral brake is an advantage for applications where mechanical holding is not required.

It reduces unnecessary mechanical components and makes the motor suitable for horizontal and continuously rotating axes.

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11.9 Flexible Connector Orientation

The right-angle bayonet connector and approximately 180° rotational capability provide additional flexibility during installation.

This is particularly useful in compact machine designs.

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12. Typical Applications

The MPL-B4540F-MJ22AA can be applied to many types of industrial automation equipment.

Application	Suitability	Main Requirement
Packaging Machinery	Excellent	Fast indexing and positioning
Automated Assembly	Excellent	High-resolution position control
Pick-and-Place Systems	Excellent	Fast acceleration/deceleration
Rotary Indexing Tables	Excellent	Repeatable positioning
Material Handling	Very Good	Controlled speed and torque
Conveyors	Very Good	Speed regulation
Printing Machinery	Excellent	Synchronized rotary motion
Labeling Machines	Excellent	Accurate position and speed
Machine Tools	Very Good	Controlled rotary axes
Inspection Equipment	Excellent	Repeatable positioning
Textile Machinery	Very Good	Continuous speed control
Cutting Machinery	Very Good	Precise synchronized motion
Converting Machinery	Excellent	Coordinated motion
Automated Feed Systems	Excellent	Repetitive positioning
Robotics	Very Good	Dynamic servo response

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13. Application in Packaging Equipment

Packaging machines often operate through short, repetitive cycles.

A typical machine may need to accelerate a conveyor or feed mechanism, move a product to a precise location, stop, perform an operation, and immediately repeat the cycle.

The low inertia of the MPL-B4540F-MJ22AA makes it well suited to this type of duty.

The high-resolution multi-turn feedback also supports accurate synchronization between the motor and the machine’s motion-control system.

The keyed shaft can simplify connection to gearboxes, timing belts, rollers, or other mechanical transmission components.

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14. Application in Automated Assembly

Automated assembly systems frequently require several servo axes to operate in coordination.

The MPL-B4540F-MJ22AA can be used for rotary positioning, transfer mechanisms, indexing systems, feeders, and other machine axes.

Its feedback capability allows the control system to monitor motor position and speed accurately.

The low-inertia rotor also helps the axis respond quickly when the controller changes the motion profile.

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15. Application in Rotary Indexing

Rotary indexing equipment is one of the applications where this motor configuration can be particularly useful.

The motor can accelerate an indexing table, move it to a programmed position, decelerate, and repeat the process at a high cycle rate.

The combination of:

• 3000 rpm speed
• 10.2 N·m continuous torque
• 27.1 N·m peak torque
• Low rotor inertia
• High-resolution multi-turn feedback

makes the motor well suited to precision indexing systems.

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16. Application in Printing and Converting Machinery

Printing and converting equipment requires accurate synchronization between multiple rotating components.

Speed variations between axes can affect registration, material tension, cutting accuracy, and product quality.

The MPL-B4540F-MJ22AA can be used where precise rotary speed and position control are required.

Its high-resolution feedback is useful for coordinating motion between multiple servo axes.

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17. Application in Material Handling

Material-handling equipment requires reliable acceleration, controlled movement, and repeatable positioning.

The motor’s 10.2 N·m continuous torque provides a useful operating range for many feed and positioning applications.

For horizontal material-handling axes, the absence of a mechanical brake is generally not a problem when the machine does not require holding against gravity.

For vertical axes, however, a brake-equipped motor should be considered.

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18. Recommended Same-Series or Closely Related Models

The following five models are particularly relevant when comparing the MPL-B4540F-MJ22AA with other motors from the same family.

Model	Series	Speed	Continuous Torque	Peak Torque	Frame / Stack	Feedback	Shaft	Brake	Approx. Weight
MPL-B4540F-MJ22AA	MPL Low-Inertia	3000 rpm	10.2 N·m	27.1 N·m	130 mm / 101.6 mm	Multi-turn high-resolution	Keyed	No	8.6–8.9 kg
MPL-B4540F-MJ24AA	MPL Low-Inertia	3000 rpm	10.2 N·m	27.1 N·m	130 mm / 101.6 mm	Multi-turn high-resolution	Keyed	24 V DC	Approx. 13 kg
MPL-B4540F-MJ72AA	MPL Low-Inertia	3000 rpm	10.2 N·m	27.1 N·m	130 mm / 101.6 mm	Multi-turn high-resolution	Keyed	No	Approx. 9 kg
MPL-B4540F-MJ74AA	MPL Low-Inertia	3000 rpm	10.2 N·m	27.1 N·m	130 mm / 101.6 mm	Multi-turn high-resolution	Keyed	24 V DC	Approx. 13 kg
MPL-B4560F-MJ74AA	MPL Low-Inertia	3000 rpm	14.1 N·m	34.4 N·m	130 mm / 152.4 mm	Multi-turn high-resolution	Keyed	24 V DC	Approx. 11.8 kg

The first four models are especially close to the MPL-B4540F-MJ22AA.

The MJ24AA and MJ74AA configurations add a brake, while the MJ72AA and MJ22AA configurations are non-brake versions.

The MPL-B4560F-MJ74AA moves to a longer magnetic stack and provides higher torque.

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19. Detailed Comparison of the Related Models

MPL-B4540F-MJ24AA

The MPL-B4540F-MJ24AA is the brake-equipped counterpart of the MJ22AA configuration.

It maintains the same general 130 mm frame, 101.6 mm stack, 3000 rpm speed class, and approximately 10.2 N·m continuous torque.

The primary difference is the integral 24 V DC brake.

This makes the MJ24AA a better choice for applications where the load must be mechanically held after the servo motor stops.

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MPL-B4540F-MJ72AA

The MPL-B4540F-MJ72AA is a later connector/configuration variant of the same basic motor class.

It maintains the core 3000 rpm and approximately 10.2 N·m torque characteristics while providing an updated connection configuration.

For replacement projects, the connector and cable compatibility should be checked carefully before selecting this model as a substitute for an older MJ22AA installation.

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MPL-B4540F-MJ74AA

The MPL-B4540F-MJ74AA combines the multi-turn high-resolution feedback arrangement with a 24 V DC brake.

It is particularly useful where precision feedback and mechanical holding are both required.

It is a logical choice for vertical positioning and other gravity-loaded applications.

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MPL-B4560F-MJ74AA

The MPL-B4560F-MJ74AA uses a longer magnetic stack and provides higher torque.

It offers approximately 14.1 N·m of continuous torque and approximately 34.4 N·m of peak torque.

This makes it suitable when the B4540F’s approximately 10.2 N·m continuous torque is not sufficient.

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20. Five Widely Used Allen-Bradley Models for Comparison

The following models are useful broader comparisons within the Allen-Bradley servo motor range.

Model	Product Series	Speed	Continuous Torque	Peak Torque	Frame / Stack	Feedback	Brake	Approx. Weight
MPL-B4530K-HK72AA	MPL Low-Inertia	4000 rpm	8.25 N·m	20.3 N·m	130 mm / 76.2 mm	High-resolution	No	Approx. 8 kg class
MPL-B4540F-HK74AA	MPL Low-Inertia	3000 rpm	10.2 N·m	27.1 N·m	130 mm / 101.6 mm	High-resolution	24 V DC	Approx. 13 kg
MPL-B4540F-MJ74AA	MPL Low-Inertia	3000 rpm	10.2 N·m	27.1 N·m	130 mm / 101.6 mm	Multi-turn high-resolution	24 V DC	Approx. 13 kg
MPL-B4560F-MJ74AA	MPL Low-Inertia	3000 rpm	14.1 N·m	34.4 N·m	130 mm / 152.4 mm	Multi-turn high-resolution	24 V DC	Approx. 11.8 kg
MPL-B540K-MJ74AA	MPL Low-Inertia	4000 rpm	19.4 N·m	48.6 N·m	165 mm / 101.6 mm	Multi-turn high-resolution	24 V DC	Approx. 15 kg

These models cover several different application requirements, including higher speed, greater torque, longer motor stack, and different feedback/brake configurations.

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21. Model Selection Guide

Application Requirement	Recommended Model	Main Reason
Multi-turn feedback, keyed shaft, no brake	MPL-B4540F-MJ22AA	Original non-brake MJ configuration
Multi-turn feedback, keyed shaft, brake	MPL-B4540F-MJ24AA	Adds 24 V DC holding brake
Updated connector configuration, no brake	MPL-B4540F-MJ72AA	Modernized configuration
Updated connector configuration with brake	MPL-B4540F-MJ74AA	Multi-turn feedback plus brake
Higher torque requirement	MPL-B4560F-MJ74AA	Higher continuous and peak torque
Higher speed requirement	MPL-B4530K-HK72AA	4000 rpm class
High-resolution feedback + brake	MPL-B4540F-HK74AA	High-resolution feedback with brake
High-resolution feedback without brake	MPL-B4540F-HK72AA	Non-brake configuration
Large torque requirement	MPL-B540K-MJ74AA	Larger frame and higher torque

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22. MJ22AA Versus MJ24AA

The most straightforward comparison is between the MPL-B4540F-MJ22AA and MPL-B4540F-MJ24AA.

Both motors belong to the same general B4540F platform and share the same principal speed and torque characteristics.

The key difference is the brake.

Parameter	MPL-B4540F-MJ22AA	MPL-B4540F-MJ24AA
Rated Speed	3000 rpm	3000 rpm
Continuous Torque	10.2 N·m	10.2 N·m
Peak Torque	27.1 N·m	27.1 N·m
Frame	130 mm	130 mm
Stack	101.6 mm	101.6 mm
Feedback	Multi-turn high-resolution	Multi-turn high-resolution
Shaft	Keyed	Keyed
Brake	No	24 V DC
Approx. Weight	8.6–8.9 kg	Approx. 13 kg
Typical Use	Horizontal/general axes	Vertical or holding applications

If a brake is not required, the MJ22AA provides a simpler and lighter motor configuration.

If the machine must hold a load mechanically after stopping, the MJ24AA is generally the more appropriate configuration.

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23. MJ22AA Versus MJ72AA

The MPL-B4540F-MJ72AA is an important comparison model when replacing an older MJ22AA motor.

The basic motor performance is in the same class, but the connection configuration differs.

For replacement work, the mechanical dimensions and motor performance may be very similar, but the motor cables, connectors, and drive-side compatibility must be checked before substitution.

Feature	MPL-B4540F-MJ22AA	MPL-B4540F-MJ72AA
Motor Family	MPL	MPL
Speed	3000 rpm	3000 rpm
Continuous Torque	10.2 N·m	10.2 N·m
Peak Torque	27.1 N·m	27.1 N·m
Feedback	Multi-turn high-resolution	Multi-turn high-resolution
Shaft	Keyed	Keyed
Brake	No	No
Frame	130 mm	130 mm
Stack	101.6 mm	101.6 mm
Main Difference	Earlier connector configuration	Updated connector configuration

For an existing machine, the cable and connector arrangement should therefore be treated as an important part of the replacement evaluation.

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24. Installation Considerations

Before installing the MPL-B4540F-MJ22AA, the machine designer should verify the mechanical and electrical requirements.

Important considerations include:

• Motor frame size
• Shaft diameter
• Shaft length
• Key dimensions
• Mounting flange
• Motor-to-load alignment
• Connector clearance
• Feedback cable routing
• Power cable routing
• Servo-drive compatibility
• Load inertia
• Required acceleration
• Required deceleration
• Continuous torque requirement
• Peak torque requirement
• Ambient temperature

The 130 mm frame should be checked against the available machine space.

The right-angle connector should also have sufficient clearance to allow cable connection without excessive bending or mechanical stress.

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25. Mechanical Alignment

Servo motors require careful mechanical alignment.

The motor shaft should be properly aligned with the driven component.

Poor alignment can result in:

• Excessive bearing loading
• Increased vibration
• Coupling wear
• Increased motor temperature
• Reduced bearing life
• Positioning errors
• Unwanted mechanical noise

A suitable precision coupling should be used when connecting the motor to a gearbox, ball screw, rotary table, pulley, or other driven mechanism.

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26. Load Inertia Matching

The motor’s low rotor inertia does not mean that the connected machine load can be ignored.

The total reflected load inertia should be evaluated during servo-system design.

A large mismatch between motor inertia and reflected load inertia can affect:

• Acceleration performance
• Servo tuning
• Positioning stability
• Settling time
• Vibration
• Overshoot
• Mechanical resonance

Proper inertia matching and servo tuning are therefore important for obtaining the best performance from the MPL-B4540F-MJ22AA.

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27. Maintenance Recommendations

Although the motor is designed for industrial service, routine inspection can help prevent unexpected downtime.

Recommended inspection points include:

• Motor mounting bolts
• Shaft coupling
• Key and keyway
• Bearings
• Feedback cable
• Power cable
• Connector condition
• Motor temperature
• Abnormal vibration
• Unusual noise
• Positioning accuracy
• Machine grounding
• Contamination around the motor

Particular attention should be given to the connector and cable system because intermittent feedback or power connections can cause servo faults.

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28. Troubleshooting Considerations

If the motor does not operate correctly, the problem should not automatically be assumed to be a motor failure.

Possible causes can include:

• Incorrect servo-drive configuration
• Feedback cable problems
• Power cable problems
• Incorrect motor parameters
• Mechanical overload
• Excessive load inertia
• Poor shaft alignment
• Mechanical binding
• Connector damage
• Insufficient grounding
• Excessive temperature
• Servo tuning problems
• Encoder-related faults

A systematic troubleshooting procedure should therefore check the mechanical system, motor wiring, feedback system, drive configuration, and machine load.

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29. Why the MPL-B4540F-MJ22AA Is a Good Choice

The MPL-B4540F-MJ22AA offers a combination of characteristics that is particularly useful for industrial automation.

Its approximately 10.2 N·m continuous torque provides useful mechanical output for its 130 mm frame.

Its approximately 27.1 N·m peak torque provides additional acceleration capability.

Its 3000 rpm rating allows relatively fast machine operation.

Its low rotor inertia supports rapid changes in speed.

Its multi-turn high-resolution encoder provides precise motion feedback.

Its keyed shaft is compatible with conventional industrial mechanical transmission arrangements.

Its non-brake configuration makes it a practical choice for horizontal axes and other applications that do not require mechanical holding.

The result is a versatile servo motor suitable for a wide range of automated machinery.

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30. Advantages at a Glance

Feature	Advantage
Low-Inertia Rotor	Rapid acceleration and deceleration
3000 rpm Rating	Suitable for fast machine cycles
10.2 N·m Continuous Torque	Strong continuous output
27.1 N·m Peak Torque	Good acceleration capability
Multi-Turn High-Resolution Encoder	Precise position feedback
Keyed Shaft	Familiar industrial mechanical interface
No Brake	Lower mechanical complexity
130 mm Frame	Good performance-to-size ratio
101.6 mm Stack	Strong torque capability
Bayonet Connector	Practical industrial connection
Right-Angle Connector	Easier cable routing
180° Connector Rotation	Flexible installation
IEC Metric Flange	Standard industrial mounting approach

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31. Overall Product Assessment

The Allen-Bradley MPL-B4540F-MJ22AA is a capable low-inertia servo motor for industrial motion-control applications requiring precise feedback, rapid dynamic response, and reliable torque output.

Its 130 mm frame and 101.6 mm stack provide a useful balance between physical size and motor performance.

The approximately 10.2 N·m continuous torque and approximately 27.1 N·m peak torque ratings make it suitable for many machine axes.

The 3000 rpm speed rating gives the motor sufficient speed for packaging, indexing, assembly, material handling, printing, converting, and other automated processes.

The multi-turn high-resolution encoder is particularly useful where the machine requires detailed position feedback across multiple motor revolutions.

The keyed shaft provides a conventional mechanical interface, making the motor suitable for a wide range of existing industrial drive arrangements.

Because this particular configuration has no integral brake, it is especially suitable for horizontal or non-gravity-loaded axes where a holding brake is not necessary.

For applications requiring a brake, the closely related MPL-B4540F-MJ24AA or MPL-B4540F-MJ74AA should be considered instead.

For applications requiring the same general performance with an updated connector arrangement, MPL-B4540F-MJ72AA is an important comparison model.

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32. Quick Reference Technical Table

Category	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Servo Motors
Model	MPL-B4540F-MJ22AA
Motor Type	Permanent-Magnet Rotary Servo Motor
Construction	Brushless AC Servo Motor
Voltage Class	460 V AC
Rated Speed	3000 rpm
Maximum Speed	3000 rpm
Continuous Stall Torque	Approx. 10.2 N·m
Peak Stall Torque	Approx. 27.1 N·m
Rated Output	Approx. 2.6 kW
Rotor Inertia	Approx. 0.00052 kg·m²
Frame Size	130 mm
Magnetic Stack	4 inch / 101.6 mm
Feedback	Multi-turn high-resolution encoder
Shaft	Keyed
Shaft Seal	No seal
Brake	No brake
Connector	Bayonet
Connector Style	Right-angle
Connector Rotation	180°
Mounting	IEC metric flange
Approx. Weight	8.6–8.9 kg
Typical Applications	Packaging, assembly, indexing, material handling, printing, converting, inspection and machine tools

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33. Final Summary

The Allen-Bradley MPL-B4540F-MJ22AA is a 460 V class, 3000 rpm, low-inertia permanent-magnet rotary servo motor belonging to the MPL servo motor family.

It provides approximately 10.2 N·m of continuous stall torque, approximately 27.1 N·m of peak stall torque, and approximately 2.6 kW of rated output.

The motor uses a 130 mm frame and a 101.6 mm magnetic stack, with an approximate motor weight of 8.6–8.9 kg.

Its multi-turn high-resolution encoder provides accurate motion feedback, while the keyed shaft offers a conventional and practical mechanical connection.

The motor has no integral brake, making it particularly suitable for horizontal positioning axes, rotary indexing systems, conveyors, packaging machines, assembly equipment, printing equipment, and other applications where mechanical holding is not required.

The low-inertia rotor is a major advantage for machines that perform frequent acceleration, deceleration, indexing, and positioning operations.

For applications requiring the same basic motor performance with a brake, the MJ24AA or MJ74AA configurations are suitable alternatives. For updated connector configurations, the MJ72AA and MJ74AA variants are important comparison models.

Overall, the MPL-B4540F-MJ22AA is a well-balanced industrial servo motor for precision automation systems where high-resolution multi-turn feedback, low inertia, 3000 rpm operation, and approximately 10.2 N·m continuous torque are required in a compact 130 mm frame.