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Allen-Bradley MPL-B580J-M-X231 Servo Motor – Detailed Specifications, Product Introduction, Applications and Model Selection Guide

1. Product Overview

The Allen-Bradley MPL-B580J-M-X231 is a high-performance low-inertia brushless AC rotary servo motor belonging to the MP-Series MPL servo motor family.

It is designed for industrial motion-control applications that require accurate positioning, controlled acceleration and deceleration, high dynamic response, and reliable closed-loop operation.

This particular model is a 400 V AC class servo motor with a 165 mm frame size, a 3800 RPM maximum speed, and approximately 34.0 N·m continuous torque capability.

The motor uses a multi-turn absolute encoder with 1024 SinCos Hiperface feedback, providing position information for precise servo control.

The shaft is a keyed shaft configuration, making it suitable for conventional industrial mechanical transmission systems.

The motor is also configured with rotatable right-angle DIN connectors, providing additional flexibility when installing the motor in machinery where cable space is limited.

The MPL-B580J-M-X231 is configured without a holding brake and incorporates a special current-boost configuration. This makes it a specialized motor configuration within the B580J family rather than simply a standard catalog motor with a generic configuration.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Brushless Servo Motors
Model	MPL-B580J-M-X231
Product Type	Rotary AC Servo Motor
Motor Technology	Brushless Permanent-Magnet Servo Motor
Application Category	Industrial Motion Control
Voltage Class	400 V AC
Motor Frame	165 mm
Maximum Speed	3800 RPM
Continuous Torque Class	34.0 N·m
Feedback	Multi-turn Absolute Encoder
Feedback Type	1024 SinCos Hiperface
Shaft	Keyed Shaft
Brake	No Brake
Connector	Rotatable DIN Connector
Connector Style	Right Angle
Special Configuration	Current Boost Enabled

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3. Basic Technical Parameters

Parameter	MPL-B580J-M-X231
Motor Type	Low-Inertia Brushless AC Servo Motor
Voltage	400 V AC class
Maximum Speed	3800 RPM
Continuous Torque	Approx. 34.0 N·m
Frame Size	165 mm
Feedback	Multi-turn Absolute Encoder
Feedback Signal	1024 SinCos Hiperface
Shaft Type	Keyed
Brake	No Brake
Connector	Right-Angle DIN
Connector Rotation	Rotatable
Mounting Standard	IEC Metric
Current Boost	Enabled
Motor Construction	Permanent-Magnet Synchronous Servo Motor
Dimension Reference	165 mm frame class
Magnet Stack	B580J configuration; approximately 203.2 mm class
Weight	Approx. 25–26 kg class; verify exact nameplate/mechanical drawing for the X231 configuration
Overall Dimensions	Configuration-dependent; use the applicable mechanical drawing for final installation dimensions

The most important performance characteristics are the 165 mm frame, 3800 RPM maximum speed, and 34.0 N·m torque class.

The 3800 RPM maximum speed differentiates the B580J configuration from many 3000 RPM-class MPL motors.

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4. Mechanical Parameters

Mechanical Parameter	Specification
Frame Size	165 mm
Magnet Stack	Approximately 203.2 mm class
Shaft	Keyed shaft
Brake	No brake
Mounting	IEC metric mounting
Connector	Right-angle DIN connector
Connector Adjustment	Rotatable
Mounting Arrangement	Flange-mounted servo motor
Rotor Type	Low-inertia rotor
Weight	Approx. 25–26 kg class
Frame Dimension	165 mm
Stack Dimension	Approximately 203.2 mm class
Overall Length	Configuration-dependent
Overall Width	Configuration-dependent
Overall Height	Configuration-dependent

The 165 mm frame places this motor in a relatively large industrial servo-motor class.

The approximately 203.2 mm magnet-stack configuration gives the B580J family a substantial active motor length and supports its higher torque capability.

Because the X231 configuration is a special motor configuration, the exact overall housing dimensions and final shipping weight should be checked against the motor’s nameplate and mechanical drawing before final machine design.

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5. Electrical and Motion Characteristics

The MPL-B580J-M-X231 is intended to operate as part of a closed-loop servo system.

Unlike a conventional constant-speed motor, the servo motor receives controlled electrical power from the servo drive while its feedback system continuously reports motor position and motion information.

The controller and drive can then regulate the motor according to the required motion profile.

The motor’s 3800 RPM maximum speed makes it suitable for applications where faster rotational movement is required.

The 34.0 N·m continuous torque class provides substantial torque capability for industrial positioning and motion applications.

The special current boost configuration is particularly important because it indicates that the motor has been configured for a higher-current operating characteristic within its intended motion-control system.

The exact allowable continuous and peak operating conditions should always be matched with the corresponding servo drive and application duty cycle.

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6. Feedback System

One of the most important characteristics of the MPL-B580J-M-X231 is its feedback system.

The motor uses a multi-turn absolute encoder with 1024 SinCos Hiperface feedback.

This allows the servo system to obtain detailed position information from the motor.

A multi-turn encoder is particularly useful for mechanisms where the motor rotates through multiple revolutions during normal operation.

Typical examples include:

• Screw-driven linear axes
• Rotary indexing systems
• Long-travel positioning mechanisms
• Material feed systems
• Roll positioning
• Automated adjustment systems
• Industrial machine axes

The feedback system also helps the servo drive maintain accurate control during acceleration, deceleration, and steady-state operation.

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7. Product Introduction

The MPL-B580J-M-X231 was designed for applications where a conventional motor does not provide enough positioning accuracy or dynamic response.

The motor combines permanent-magnet servo technology with a low-inertia rotor.

The low-inertia construction allows the motor to change speed rapidly. When a machine needs to accelerate, stop, reverse, or move between multiple positions, the motor can respond quickly to changes in the command.

This characteristic is especially useful in automated machinery.

For example, a packaging machine may need to move a product a fixed distance, stop, perform an operation, and then immediately move to another position.

A servo motor such as the MPL-B580J-M-X231 can perform these repeated movements under closed-loop control.

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8. Main Advantages

8.1 High-Speed Capability

The maximum speed of approximately 3800 RPM is one of the main advantages of the B580J configuration.

This provides more speed headroom than many 3000 RPM-class servo motors.

It can be beneficial for machines that require:

• Rapid indexing
• High-speed material feeding
• Fast roller rotation
• Short positioning cycles
• High-speed converting
• Rapid acceleration and deceleration

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8.2 High Torque Capability

The motor provides approximately 34.0 N·m continuous torque capability.

This gives it a strong position in applications that require both speed and torque.

The motor can therefore be considered for machine axes that require more than a small or medium servo motor can comfortably provide.

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8.3 Low-Inertia Rotor

Low rotor inertia is a major advantage for dynamic motion.

When rotor inertia is reduced, less torque is required simply to accelerate the motor’s own rotating mass.

More of the available motor torque can therefore be used to accelerate the machine load.

This is particularly useful for repeated motion cycles.

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8.4 Multi-Turn Absolute Feedback

The multi-turn absolute encoder provides position information over multiple motor revolutions.

This is especially useful for long-travel mechanical axes and rotary mechanisms.

It also provides the servo system with a high-quality feedback signal for closed-loop control.

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8.5 Keyed Shaft

The keyed shaft provides a familiar and robust mechanical connection.

It can be used with suitable:

• Couplings
• Gearboxes
• Timing pulleys
• Rollers
• Gear mechanisms
• Lead screws
• Mechanical transmission systems

This makes the motor relatively straightforward to integrate into conventional industrial machinery.

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8.6 Rotatable DIN Connector

The right-angle DIN connector is designed with installation flexibility in mind.

The connector can be rotated, allowing the cable exit direction to be adjusted according to the machine layout.

This is particularly useful when the motor is installed inside a compact machine frame.

It can help reduce cable interference with:

• Machine guards
• Cable carriers
• Adjacent motors
• Structural members
• Gearboxes
• Other electrical equipment

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8.7 Special Current Boost Configuration

The X231 configuration includes a special current-boost characteristic.

This makes the model different from an ordinary standard B580J motor configuration.

The current-boost feature should be considered when selecting the matching servo drive because the electrical configuration, drive capacity, and application duty cycle must be compatible.

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9. Typical Applications

9.1 Packaging Machinery

Packaging equipment is one of the most suitable areas for low-inertia servo motors.

The MPL-B580J-M-X231 can be considered for:

• Product indexing
• Conveyor synchronization
• Film feeding
• Cutting
• Sealing
• Labeling
• Carton positioning
• Product transfer

The fast 3800 RPM capability can be useful when short machine cycles are required.

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9.2 Material Handling

The motor can also be used for controlled material movement.

Typical applications include:

• Transfer systems
• Automated conveyors
• Positioning axes
• Roller drives
• Sorting mechanisms
• Feed mechanisms
• Automated handling systems

The absolute multi-turn feedback can provide useful position information for controlled movement.

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9.3 Printing Machinery

Printing machines often require synchronization between multiple rotating components.

The motor may be used for:

• Feed rollers
• Registration systems
• Web handling
• Cutting
• Roller positioning
• Tension-related motion

High-speed operation and accurate feedback are particularly useful in these applications.

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9.4 Converting Equipment

Converting machinery includes equipment for cutting, slitting, feeding, winding, and processing continuous material.

Servo motors are often used because the machine needs accurate synchronization between several mechanical sections.

The MPL-B580J-M-X231 can be considered for:

• Web handling
• Slitting
• Cutting
• Feeding
• Roller control
• Registration
• Indexing

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9.5 Assembly Machines

Automated assembly equipment frequently requires repeatable positioning.

Typical applications include:

• Rotary indexing
• Component positioning
• Automated fixtures
• Transfer mechanisms
• Pick-and-place systems
• Assembly stations
• Controlled screw or feed mechanisms

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9.6 Machine Tools

The motor can also be used for suitable machine-tool motion axes.

Potential applications include:

• Feed axes
• Rotary positioning
• Auxiliary axes
• Indexing mechanisms
• Tool positioning

The final suitability depends on the machine’s required speed, torque, acceleration, inertia, and duty cycle.

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10. Typical Motion-Control System

The MPL-B580J-M-X231 is not normally used as an independent component.

A complete servo system generally includes:

System Component	Function
Motion Controller	Generates the required motion commands
Servo Drive	Controls motor current, speed, and torque
Servo Motor	Converts electrical energy into mechanical motion
Absolute Encoder	Provides motor position feedback
Power Cable	Transfers controlled motor power
Feedback Cable	Transfers encoder information
Coupling	Connects motor shaft to machine
Gearbox	Changes torque/speed when required
Machine Load	Performs the actual mechanical work

The performance of the complete system depends on how these components are matched.

A high-performance motor cannot compensate for an incorrectly sized drive, unsuitable gearbox, excessive mechanical inertia, poor coupling alignment, or an inappropriate motion profile.

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11. Important Motor Selection Factors

When considering the MPL-B580J-M-X231, several parameters should be evaluated together.

Continuous Torque

The continuous machine load should remain within the motor’s continuous operating capability.

Peak Torque

Acceleration, deceleration, cutting, indexing, and sudden load changes can require considerably more torque than steady-state operation.

Motor Speed

The actual operating speed should be evaluated throughout the entire motion profile.

Load Inertia

The inertia reflected back to the motor has a major effect on dynamic response and servo tuning.

Acceleration

High acceleration requires high torque.

Duty Cycle

Repeated high-load operation can create considerably more thermal stress than intermittent operation.

Ambient Temperature

The machine environment affects motor cooling and allowable continuous loading.

Mechanical Transmission

Gear ratios, pulleys, belts, couplings, and lead screws all influence the motor’s effective load.

Holding Requirements

Because this model has no standard brake, vertical axes and gravity-loaded mechanisms require special attention.

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12. Dimensions and Weight

Dimension / Physical Parameter	Value
Frame Size	165 mm
Frame Size in Inches	6.50 in class
Magnet Stack	Approximately 203.2 mm class
Magnet Stack in Inches	8.0 in class
Weight	Approx. 25–26 kg class
Shaft	Keyed
Connector	Right-angle DIN
Connector Position	Rotatable
Overall Length	Configuration-dependent
Overall Width	Configuration-dependent
Overall Height	Configuration-dependent

For machine-layout work, the 165 mm frame and approximately 203.2 mm stack length provide a useful first reference.

However, the complete motor envelope includes the flange, shaft extension, connector arrangement, and rear housing.

Therefore, the final installation drawing should be used when determining exact clearances.

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13. Environmental and Installation Considerations

The motor should be installed in an environment appropriate for industrial servo equipment.

Important factors include:

• Ambient temperature
• Moisture
• Dust
• Vibration
• Mechanical shock
• Oil or chemical exposure
• Cable routing
• Shaft sealing
• Motor ventilation
• Mounting rigidity

The mounting surface should be sufficiently rigid to prevent excessive vibration.

The shaft should be correctly aligned with the driven mechanism.

Poor alignment can increase bearing loading and may produce vibration, noise, or premature mechanical wear.

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14. Cable Installation

Servo motor cables should be routed carefully.

The power cable and feedback cable should not be subjected to unnecessary mechanical stress.

Avoid:

• Sharp bends
• Excessive pulling
• Crushing
• Continuous rubbing
• Excessive heat
• Unsupported cable weight at the connector

The right-angle connector can help simplify cable routing in tight machine spaces.

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15. Maintenance

A properly installed servo motor generally requires less routine maintenance than many mechanically complex systems, but regular inspection is still important.

Recommended inspection points include:

• Mounting bolts
• Motor flange
• Shaft coupling
• Connector condition
• Cable insulation
• Cable carrier movement
• Abnormal vibration
• Abnormal noise
• Excessive temperature
• Repeated servo faults
• Mechanical backlash
• Encoder-related errors

If the motor begins operating at an unusually high temperature, the cause should be investigated.

Possible causes can include excessive mechanical load, incorrect servo tuning, poor ventilation, mechanical binding, excessive acceleration, or an unsuitable duty cycle.

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16. Recommended Same-Series or Closely Related Models

The following five models are particularly relevant when comparing the MPL-B580J-M-X231 with other motors in the same MPL family.

Model	Speed Class	Feedback	Shaft	Brake	Frame / Stack	Weight / Dimension Reference
MPL-B580J-M-X231	3800 RPM max	Multi-turn absolute, 1024 SinCos Hiperface	Keyed	No	165 mm / approx. 203.2 mm	Approx. 25–26 kg class
MPL-B580J-MJ72AA	3800 RPM class	Multi-turn absolute	Keyed	No	165 mm / approx. 203.2 mm	Configuration-dependent
MPL-B580J-MJ74AA	3800 RPM class	Multi-turn absolute	Keyed	24 V DC brake configuration	165 mm / approx. 203.2 mm	Configuration-dependent
MPL-B580J-MK72AA	3800 RPM class	Multi-turn absolute	Keyless	No	165 mm / approx. 203.2 mm	Configuration-dependent
MPL-B580J-MK74AA	3800 RPM class	Multi-turn absolute	Keyless	24 V DC brake configuration	165 mm / approx. 203.2 mm	Configuration-dependent

These models are useful because they maintain the same general B580J motor platform while changing important mechanical or braking characteristics.

The MJ72AA is the closest standard comparison to the X231 configuration.

The MJ74AA becomes more attractive when a holding brake is required.

The MK72AA is useful when a keyless shaft is preferred.

The MK74AA combines the keyless shaft with a brake configuration.

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17. Related Model Comparison

Model	Main Difference	Speed	Feedback	Shaft	Brake
MPL-B580J-M-X231	Special current-boost configuration	3800 RPM max	Multi-turn absolute	Keyed	No
MPL-B580J-MJ72AA	Standard configuration	3800 RPM class	Multi-turn absolute	Keyed	No
MPL-B580J-MJ74AA	Brake version	3800 RPM class	Multi-turn absolute	Keyed	Yes
MPL-B580J-MK72AA	Keyless shaft	3800 RPM class	Multi-turn absolute	Keyless	No
MPL-B580J-MK74AA	Keyless + brake	3800 RPM class	Multi-turn absolute	Keyless	Yes

This comparison shows why the X231 model is not simply interchangeable with every B580J motor.

The motor’s special current-boost configuration and exact electrical characteristics should be matched with the intended drive and machine requirements.

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18. Five Popular Models from the Same Brand

For a broader product-selection list, the following models are useful related choices from the same brand.

Model	Product Category	Main Parameter	Feedback	Shaft / Brake	Dimension Reference	Weight
MPL-B580J-M-X231	MPL Servo Motor	400 V AC class, 3800 RPM, 34.0 N·m class	Multi-turn absolute, 1024 SinCos Hiperface	Keyed / No brake	165 mm / approx. 203.2 mm stack	Approx. 25–26 kg
MPL-B580J-MJ72AA	MPL Servo Motor	3800 RPM class	Multi-turn absolute	Keyed / No brake	165 mm / approx. 203.2 mm stack	Configuration-dependent
MPL-B580J-MJ74AA	MPL Servo Motor	3800 RPM class	Multi-turn absolute	Keyed / Brake	165 mm / approx. 203.2 mm stack	Configuration-dependent
MPL-B580J-SJ74AA	MPL Servo Motor	3800 RPM class	Single-turn configuration	Keyed / Brake	165 mm / approx. 203.2 mm stack	Configuration-dependent
MPL-B560F-SJ74AA	MPL Servo Motor	3000 RPM class	Single-turn configuration	Keyed / Brake	165 mm / approx. 152.4 mm stack	Configuration-dependent

These models cover several common servo-motor configurations, including high-speed B580J motors, multi-turn feedback versions, brake versions, and shorter-stack B560F motors.

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19. B580J Versus B580F

The B580J and B580F families are closely related, but their speed characteristics are different.

Feature	B580F	B580J
Frame	165 mm	165 mm
Magnet Stack	Approx. 203.2 mm class	Approx. 203.2 mm class
Typical Speed Class	3000 RPM	3800 RPM
Torque Class	High	High
Dynamic Response	Very good	Very good
High-Speed Application	Good	Excellent
Typical Use	General industrial motion	Higher-speed industrial motion

The B580J configuration is particularly interesting when machine speed is a major requirement.

If the machine normally operates around 3000 RPM or below, the B580F family may already provide sufficient performance.

If the machine requires more rotational speed, the B580J family deserves closer consideration.

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20. Advantages for High-Speed Motion

The MPL-B580J-M-X231 is especially suitable for applications where speed and dynamic response must work together.

A high-speed servo motor is not useful simply because it can rotate quickly.

The machine must also be able to accelerate and decelerate safely, maintain accurate feedback, and manage the resulting mechanical energy.

The low-inertia rotor helps in this area.

For example, when a machine changes from 1000 RPM to 3000 RPM, the motor must accelerate its rotating components as well as the reflected load.

A lower-inertia motor can make this transition easier for the servo system.

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21. Applications Where the X231 Configuration Is Particularly Interesting

The X231 configuration can be considered for applications where the special current-boost characteristic is useful.

Potential examples include:

• High-speed indexing
• Rapid rotary positioning
• Packaging equipment
• High-speed feeding
• Roller applications
• Converting machinery
• Printing machinery
• Automated production lines
• High-speed material handling
• Motion axes with frequent acceleration and deceleration

The actual suitability depends on the complete servo-drive combination and machine duty cycle.

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22. No-Brake Configuration

The MPL-B580J-M-X231 is configured without a holding brake.

This can be advantageous in applications where mechanical holding is unnecessary.

Examples include many horizontal-axis applications.

However, this configuration requires additional consideration for vertical axes.

If the machine carries a load that can fall under gravity, the motor should not be relied upon as the sole mechanical holding device.

A suitable mechanical holding or braking arrangement may be required.

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23. Mechanical Integration

The motor’s keyed shaft provides a conventional connection point for the machine’s transmission.

When selecting the coupling, the following should be checked:

• Shaft diameter
• Key dimensions
• Rated speed
• Torque capacity
• Allowable misalignment
• Axial movement
• Radial load
• Environmental conditions

A properly selected coupling helps protect the motor bearings and maintain accurate motion.

Incorrect coupling alignment can create vibration and increase bearing stress.

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24. Thermal Considerations

Servo motors can experience significantly different thermal loading depending on the motion profile.

A motor operating at moderate torque continuously may produce a different thermal condition from a motor that repeatedly accelerates a heavy load.

Important factors include:

• Continuous torque
• Peak torque
• Speed
• Acceleration
• Deceleration
• Cycle time
• Ambient temperature
• Mounting arrangement
• Motor ventilation
• Mechanical load

The approximately 34.0 N·m torque figure should therefore not be treated as a universal operating value for every application.

The complete duty cycle should be evaluated before final motor selection.

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25. Servo Tuning Considerations

A low-inertia servo motor can respond very quickly.

This is an advantage, but it also means that the servo system should be tuned correctly.

Incorrect tuning can result in:

• Overshoot
• Oscillation
• Excessive following error
• Mechanical vibration
• Audible motor noise
• Increased temperature
• Poor positioning performance

The mechanical load, reflected inertia, gearbox ratio, coupling stiffness, and motion profile should all be considered when tuning the system.

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26. Product Advantages at a Glance

Advantage	Description
High-Speed Operation	Up to approximately 3800 RPM
High Torque	Approximately 34.0 N·m continuous torque class
Low Inertia	Fast acceleration and deceleration
Absolute Feedback	Multi-turn position feedback
High-Resolution Feedback	1024 SinCos Hiperface configuration
Keyed Shaft	Convenient conventional mechanical connection
Flexible Connector	Rotatable right-angle DIN connector
Large Frame	165 mm industrial servo frame
Special Current Boost	Designed for a specialized electrical configuration
No Brake	Suitable for applications without mechanical holding requirements

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27. Practical Selection Guide

Application Requirement	Recommended Direction
Need approximately 3800 RPM	B580J family
Need approximately 3000 RPM	B580F family
Need multi-turn absolute feedback	M configuration
Need keyed shaft	J configuration
Need keyless shaft	K configuration
Need no brake	72 configuration
Need brake	74 configuration
Need specialized current boost	MPL-B580J-M-X231
Need shorter motor stack	B560F family
Need higher-speed motion	B580J family

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28. Quick Technical Reference

Parameter	Specification
Brand	Allen-Bradley
Family	MP-Series
Series	MPL Low-Inertia Brushless Servo Motors
Model	MPL-B580J-M-X231
Motor Type	Rotary AC Servo Motor
Voltage Class	400 V AC
Frame	165 mm
Magnet Stack	Approx. 203.2 mm class
Maximum Speed	3800 RPM
Continuous Torque	Approx. 34.0 N·m
Feedback	Multi-turn Absolute Encoder
Feedback Signal	1024 SinCos Hiperface
Shaft	Keyed
Brake	No Brake
Connector	Right-Angle DIN
Connector	Rotatable
Mounting	IEC Metric
Current Boost	Enabled
Weight	Approx. 25–26 kg class
Frame Dimension	165 mm
Stack Dimension	Approx. 203.2 mm
Overall Dimensions	Configuration-dependent
Typical Applications	Packaging, printing, converting, material handling, indexing, assembly, machine tools

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29. Final Product Evaluation

The Allen-Bradley MPL-B580J-M-X231 is a specialized high-speed member of the MPL low-inertia servo motor family.

Its combination of a 165 mm frame, approximately 203.2 mm magnet-stack class, 3800 RPM maximum speed, approximately 34.0 N·m continuous torque class, multi-turn absolute encoder, 1024 SinCos Hiperface feedback, and keyed shaft gives it a strong position in demanding industrial motion applications.

The low-inertia design is particularly useful where fast acceleration and deceleration are required.

The multi-turn absolute feedback provides accurate position information for closed-loop motion control.

The rotatable right-angle DIN connector also makes the motor easier to integrate into machinery with restricted cable space.

The lack of a holding brake makes the model particularly suitable for applications where mechanical holding is not required.

The most important difference compared with a conventional B580F motor is the higher 3800 RPM speed class. This makes the B580J platform a better candidate for higher-speed motion applications.

The X231 designation also indicates a special configuration, including the current-boost characteristic. Because of this, the motor should be matched carefully with the intended servo drive and operating conditions rather than treated as a completely interchangeable replacement for every B580J motor.

Overall, the MPL-B580J-M-X231 can be regarded as a high-speed, high-torque, low-inertia industrial servo motor for demanding closed-loop motion-control applications, particularly where rapid movement, accurate feedback, and high dynamic performance are important.