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Allen-Bradley MPL-B560F-SJ74AA Servo Motor – Detailed Product Description

1. Product Overview

The Allen-Bradley MPL-B560F-SJ74AA is a high-performance AC rotary servo motor designed for industrial motion-control applications that require accurate positioning, stable speed regulation, strong torque performance, and reliable operation.

It belongs to the MP-Series MPL family of low-inertia brushless servo motors. The motor uses a permanent-magnet synchronous design and is intended for applications where fast acceleration, controlled deceleration, repeatable positioning, and responsive servo performance are important.

The MPL-B560F-SJ74AA is a 460 V class servo motor with a 165 mm frame size, 152.4 mm magnet stack length, and a rated speed of 3000 rpm. It uses a single-turn high-resolution absolute encoder for feedback and incorporates a keyed shaft extension together with a 24 V DC holding brake.

This configuration makes the motor particularly suitable for machinery where the motor must provide both dynamic motion and secure holding when the machine stops or enters a stationary condition.

The motor is also designed around an IEC metric mounting arrangement, making it convenient for integration into industrial machine structures where standardized metric mounting dimensions are preferred.

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2. Basic Product Information

Parameter	Specification
Brand	Allen-Bradley
Product Model	MPL-B560F-SJ74AA
Product Family	MP-Series
Product Series	MPL Low-Inertia Brushless Servo Motors
Product Type	AC Rotary Servo Motor
Motor Construction	Brushless Permanent-Magnet Servo Motor
Voltage Class	400 V / 480 V AC class
Armature Voltage	460 V
Frame Size	5 / 165 mm
Magnet Stack Length	152.4 mm
Rated Speed	3000 rpm
Continuous Stall Torque	Approx. 26.8 N·m
Feedback	Single-turn high-resolution absolute encoder
Encoder Resolution	1024 Sin/Cos cycles per revolution
Feedback Protocol	Hiperface
Shaft	Keyed shaft extension
Shaft Seal	No shaft seal
Brake	24 V DC holding brake
Connector	SpeedTEC DIN connector
Connector Style	Right-angle configuration
Connector Adjustment	Approximately 180° rotatable
Mounting	IEC metric
Mounting Holes	Free mounting holes / Type FF
Inertia Class	Low inertia
Dimensions	Frame size 165 mm; magnet stack 152.4 mm; complete external dimensions depend on mechanical configuration
Approx. Weight	40.82 kg (90 lb)

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3. Product Series

The MPL-B560F-SJ74AA belongs to the MPL low-inertia brushless servo motor series.

This series is designed for motion applications where a motor must respond quickly to commands from a servo drive. Low rotor inertia is particularly valuable when the machine repeatedly accelerates, decelerates, reverses direction, or performs short positioning movements.

Compared with a conventional industrial motor, a servo motor is not simply selected according to power and speed. The motor, feedback system, servo drive, mechanical load, and control system work together as one motion-control system.

The MPL series therefore focuses on characteristics such as:

• Low mechanical inertia
• Fast acceleration and deceleration
• Precise position feedback
• Stable speed control
• High torque response
• Compact motor construction
• Integrated feedback
• Optional holding brake configurations
• Industrial machine compatibility
• Metric mounting arrangements

The MPL-B560F-SJ74AA represents a relatively large frame configuration within the MPL family and is intended for applications requiring substantially more mechanical output than smaller servo motor frames.

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4. Detailed Technical Parameters

4.1 Electrical and Performance Parameters

Parameter	MPL-B560F-SJ74AA
Model	MPL-B560F-SJ74AA
Motor Type	Brushless permanent-magnet AC servo motor
Voltage Class	400 V / 480 V AC
Armature Voltage	460 V
Rated Speed	3000 rpm
Continuous Stall Torque	Approx. 26.8 N·m
Torque Characteristics	High dynamic servo torque
Motor Technology	Permanent-magnet synchronous servo technology
Control Type	Closed-loop servo control
Feedback	Single-turn absolute high-resolution encoder
Encoder Signal	Sin/Cos
Encoder Cycles	1024 cycles/revolution
Encoder Protocol	Hiperface
Brake	24 V DC holding brake
Shaft	Keyed
Shaft Seal	No shaft seal
Connector	SpeedTEC DIN
Connector Orientation	Right angle
Connector Rotation	180° rotatable
Mounting Standard	IEC metric
Frame Size	165 mm
Magnet Stack	152.4 mm
Weight	Approx. 40.82 kg
Dimensions	Frame size 165 mm; stack length 152.4 mm; full motor dimensions depend on the mechanical drawing

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4.2 Mechanical Parameters

Mechanical Parameter	Specification
Model	MPL-B560F-SJ74AA
Frame Size	165 mm
Frame Classification	Size 5
Magnet Stack Length	152.4 mm
Shaft Configuration	Keyed shaft extension
Shaft Seal	No shaft seal
Mounting Type	IEC metric flange mounting
Mounting Holes	Free mounting holes / Type FF
Connector Position	Right-angle connector
Connector Adjustment	180° rotatable
Brake	Integrated 24 V DC holding brake
Motor Construction	Low-inertia brushless design
Approx. Weight	40.82 kg
Main Dimensional Reference	165 mm frame size
Axial Motor Dimension	Magnet stack length 152.4 mm
Complete Length	Configuration-dependent; use mechanical drawing for installation clearance
Overall Width	Configuration-dependent
Overall Height	Configuration-dependent

The 165 mm frame size is an important selection parameter because it determines the mechanical mounting class of the motor. The 152.4 mm magnet stack length is another important designation because it identifies the active motor stack used within this particular configuration.

For actual machine design, the complete dimensional drawing should always be used for shaft length, flange dimensions, mounting-hole locations, connector clearance, brake clearance, and total motor envelope.

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5. Model Number Explanation

The model number MPL-B560F-SJ74AA contains several configuration identifiers.

Model Section	Meaning
MPL	MPL low-inertia brushless servo motor family
B	Motor configuration designation
5	Frame size classification
60	Magnet stack designation
F	Motor configuration/version designation
S	Single-turn feedback configuration
J	Specific motor configuration
74	Configuration including 24 V DC brake
AA	Product revision/configuration designation

The most useful part of the model number for system selection is the combination of frame size, stack length, feedback type, shaft arrangement, and brake configuration.

For example, the SJ74AA configuration indicates a single-turn feedback motor with a keyed shaft and 24 V DC holding brake.

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6. Encoder and Feedback System

One of the most important characteristics of the MPL-B560F-SJ74AA is its single-turn high-resolution absolute encoder.

The encoder provides the servo control system with information about motor shaft position. This allows the servo drive to continuously compare the commanded position with the actual motor position.

The feedback system is especially important in applications requiring:

• Accurate positioning
• Controlled acceleration
• Controlled deceleration
• Repeatable indexing
• Electronic gearing
• Coordinated motion
• Speed regulation
• Position correction
• Rapid direction changes

The encoder configuration uses 1024 Sin/Cos cycles per revolution and an absolute single-turn feedback arrangement.

The single-turn design is well suited to machines where the primary requirement is accurate angular position within one motor revolution rather than maintaining an absolute multi-turn position over many revolutions.

This makes the SJ74AA configuration attractive for rotary axes, indexing systems, feed mechanisms, conveyors, machine tooling, packaging equipment, and many other applications where accurate closed-loop motion is required.

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7. Keyed Shaft Configuration

The MPL-B560F-SJ74AA uses a keyed shaft extension.

A keyed shaft is useful when the mechanical transmission requires a positive mechanical connection between the motor shaft and the driven component.

Typical applications include:

• Gearboxes
• Timing pulleys
• Couplings
• Belt-driven mechanisms
• Rollers
• Feed screws
• Rotary tables
• Indexing mechanisms

The key provides mechanical torque transmission and helps prevent relative rotation between the shaft and the mounted component when the correct mechanical connection is used.

During installation, the coupling or transmission component should be selected according to the actual shaft diameter, key dimensions, allowable radial load, allowable axial load, and operating speed.

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8. 24 V DC Holding Brake

The MPL-B560F-SJ74AA incorporates a 24 V DC holding brake.

The brake is primarily intended to hold the motor shaft when the servo system is stopped or when the machine requires mechanical holding force.

This feature is particularly useful for vertical or gravity-loaded mechanisms.

Typical examples include:

• Vertical lifting axes
• Elevators
• Z-axis machine tools
• Vertical transfer mechanisms
• Pick-and-place vertical axes
• Material handling equipment
• Lifting platforms
• Vertical positioning systems

The brake should not automatically be considered a substitute for a properly engineered safety braking system.

In a complete machine, the brake control sequence should be coordinated with the servo drive and machine controller. The application should also consider whether the brake is intended for holding only or for repeated dynamic stopping.

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9. Connector Configuration

The motor uses a SpeedTEC DIN connector in a right-angle arrangement.

The connector is designed to provide a practical connection between the motor and the associated servo system while allowing the connector position to be adjusted.

The connector can be rotated through approximately 180 degrees, which can be particularly useful when the available cable-routing space is limited.

This is valuable in compact machines where:

• Cable trays are close to the motor
• Motors are installed inside machine frames
• Multiple servo motors are installed close together
• Cable bending radius must be controlled
• Connector accessibility is limited

Correct connector orientation can reduce unnecessary cable stress and simplify machine assembly.

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10. Product Introduction

The MPL-B560F-SJ74AA is designed for industrial motion applications where precision, dynamic response, and mechanical reliability are more important than simply providing continuous rotary power.

A servo motor differs from a conventional induction motor because the control system actively monitors motor position and speed.

When a movement command is issued, the servo drive supplies the appropriate current to the motor. The encoder continuously reports the actual motor position. The control system then adjusts motor torque and speed so that the motor follows the commanded motion.

This closed-loop operating principle provides much better control over positioning and acceleration than a simple open-loop motor arrangement.

The low-inertia construction of the MPL-B560F-SJ74AA is particularly beneficial when the machine frequently changes speed.

Reducing rotor inertia means the control system can accelerate and decelerate the motor more effectively. This can help improve cycle time and positioning response when the machine is correctly sized.

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11. Main Product Advantages

11.1 Low-Inertia Construction

The low-inertia rotor design allows the motor to respond quickly to changes in the motion command.

This is especially useful in machines that repeatedly start, stop, accelerate, decelerate, and reverse direction.

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11.2 High-Precision Feedback

The single-turn high-resolution encoder provides accurate position information to the servo control system.

This helps the machine maintain consistent positioning and repeatability during normal operation.

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11.3 3000 RPM Rated Speed

The 3000 rpm rating provides a useful combination of speed and torque for many industrial machine axes.

It is suitable for applications where both rapid movement and controlled positioning are required.

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11.4 Strong Torque Capability

With approximately 26.8 N·m of continuous stall torque, the motor is suitable for relatively demanding motion applications.

The actual available operating torque depends on the servo drive, motor temperature, speed, duty cycle, load profile, and application conditions.

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11.5 Integrated Holding Brake

The 24 V DC holding brake provides an additional mechanical holding function.

This is particularly valuable for vertical axes and applications where the shaft should remain stationary when servo power is removed.

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11.6 Keyed Shaft

The keyed shaft provides a practical mechanical interface for couplings, gearboxes, pulleys, and other transmission components.

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11.7 Rotatable Right-Angle Connector

The right-angle connector helps with cable management, while the rotatable configuration provides additional installation flexibility.

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11.8 Industrial Machine Compatibility

The motor is designed around industrial servo-system requirements and can be incorporated into automated production machinery, motion-control systems, and precision mechanical equipment.

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12. Main Applications

Packaging Machinery

The MPL-B560F-SJ74AA can be used for packaging machine axes requiring controlled movement, indexing, feeding, cutting, sealing, or positioning.

Typical applications include:

• Film feeding
• Product positioning
• Cutting mechanisms
• Rotary indexing
• Carton handling
• Label positioning
• Conveyor synchronization

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Material Handling

The motor can be applied to automated material-handling mechanisms where precise acceleration and positioning are required.

Examples include:

• Transfer mechanisms
• Conveyor axes
• Lifting systems
• Positioning tables
• Automated handling equipment

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Machine Tools

Servo motors are widely used for controlled machine axes.

The MPL-B560F-SJ74AA can be considered for:

• Feed axes
• Rotary axes
• Indexing mechanisms
• Tool positioning
• Automated machine movements

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Assembly Machinery

The motor is suitable for automated assembly systems that require repeatable positioning and coordinated motion.

Applications can include:

• Component insertion
• Rotary indexing
• Pick-and-place mechanisms
• Assembly transfer systems
• Automated positioning

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Printing and Converting Machinery

Fast response and accurate feedback make low-inertia servo motors useful in printing and converting applications.

Possible applications include:

• Web feeding
• Roller synchronization
• Registration control
• Material positioning
• Cutting and indexing

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Electronics Manufacturing Equipment

Precision servo control can be useful in automated electronic-product assembly and handling equipment.

Examples include:

• Component positioning
• Inspection stages
• Automated feeders
• Transfer mechanisms
• Precision indexing

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Robotics and Automated Machinery

The motor can also be used as part of an automated mechanical axis where accurate closed-loop motion is required.

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13. Typical Machine Architecture

A typical motion-control system using the MPL-B560F-SJ74AA may contain the following elements:

System Component	Function
MPL-B560F-SJ74AA	Servo motor providing mechanical motion
Servo Drive	Supplies controlled electrical power to the motor
Motion Controller	Generates motion commands
Encoder	Provides motor position feedback
Brake Circuit	Controls the 24 V DC holding brake
Mechanical Coupling	Transfers motor torque to the machine
Gearbox	Reduces speed/increases mechanical torque when required
Machine Controller	Coordinates overall machine operation
Safety System	Provides machine safety functions

The motor should always be selected together with the servo drive and mechanical load.

A motor that appears suitable based only on rated speed or torque may not be appropriate if the load has high inertia, high friction, excessive radial force, or an unsuitable duty cycle.

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14. Installation Considerations

Before installation, several mechanical and electrical factors should be considered.

Mechanical Installation

The mounting flange must be properly aligned with the machine.

The motor should not be forced into position using the shaft or coupling. Incorrect alignment can result in excessive bearing loads and reduced service life.

The coupling should be properly aligned and selected for the actual operating speed and torque.

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Cable Installation

Motor and feedback cables should be routed carefully.

Avoid excessive bending, pulling, twisting, or mechanical stress around the connectors.

The rotatable right-angle connector provides additional flexibility, but cable routing should still respect the required bending radius.

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Brake Installation

The 24 V DC brake should be controlled according to the servo-system requirements.

For vertical applications, the machine design should consider what happens when power is lost.

The brake should be treated as part of the complete mechanical and safety design rather than as an independent safety device.

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Thermal Considerations

Servo motors can generate significant heat during high-load operation.

Motor temperature depends on:

• Load torque
• Operating speed
• Acceleration frequency
• Duty cycle
• Ambient temperature
• Installation position
• Cooling conditions
• Mechanical load

Adequate ventilation and sufficient clearance around the motor should therefore be maintained.

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15. Selection Advantages of MPL-B560F-SJ74AA

The MPL-B560F-SJ74AA is a strong choice when the application requires a combination of:

• 400/480 V class operation
• 3000 rpm speed
• Approximately 26.8 N·m continuous stall torque
• Low-inertia performance
• Single-turn high-resolution feedback
• Keyed shaft
• 24 V DC holding brake
• IEC metric mounting
• Right-angle rotatable connector
• Industrial servo control
• Repeatable positioning
• Fast dynamic response

The configuration is particularly attractive when the machine designer needs a relatively powerful servo motor while still maintaining responsive motion characteristics.

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16. Five Same-Series or Closely Related Models

The following models are useful comparison points when selecting an MPL-series servo motor.

Model	Series / Type	Feedback	Speed	Brake	Shaft	Frame / Size	Approx. Weight
MPL-B560F-SJ72AA	MPL low-inertia servo motor	Single-turn high-resolution	3000 rpm	No brake configuration	Keyed	165 mm class	Approx. 40.8 kg class
MPL-B560F-SJ74AA	MPL low-inertia servo motor	Single-turn high-resolution	3000 rpm	24 V DC	Keyed	165 mm	Approx. 40.82 kg
MPL-B560F-MK72AA	MPL low-inertia servo motor	Multi-turn high-resolution	3000 rpm class	No brake configuration	Keyed/configuration dependent	165 mm class	Configuration dependent
MPL-B560F-MK74AA	MPL low-inertia servo motor	Multi-turn high-resolution	3000 rpm class	24 V DC	Configuration dependent	165 mm class	Configuration dependent
MPL-A540K-MJ74AA	MPL servo motor	High-resolution feedback	4000 rpm class	24 V DC configuration	Configuration dependent	Smaller frame class	Configuration dependent

The most direct comparison to the MPL-B560F-SJ74AA is the MPL-B560F-SJ72AA.

Both belong to the same general motor family and share the same basic frame and speed class, while the brake configuration is an important difference.

The MK configurations are useful when the application requires multi-turn position information rather than single-turn feedback.

The MPL-A540K-MJ74AA represents a different frame and performance configuration and can be considered when a smaller or higher-speed motor configuration is more appropriate.

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17. Comparison of Key Related Models

Model	Main Difference	Typical Selection Reason	Dimensions	Weight
MPL-B560F-SJ72AA	Similar single-turn configuration without the same brake option	Applications that do not require an integrated holding brake	165 mm frame class; stack configuration varies by model	Approx. 40.8 kg class
MPL-B560F-SJ74AA	Single-turn feedback + 24 V DC brake	Applications requiring single-turn feedback and shaft holding	165 mm frame; 152.4 mm stack	Approx. 40.82 kg
MPL-B560F-MK72AA	Multi-turn feedback	Applications requiring multi-turn position information	165 mm frame class	Configuration dependent
MPL-B560F-MK74AA	Multi-turn feedback + brake	Vertical or multi-turn positioning applications	165 mm frame class	Configuration dependent
MPL-A540K-MJ74AA	Different frame and speed configuration	Applications requiring a different motor size or higher speed	Different frame configuration	Configuration dependent

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18. Five Popular Models from the Same Brand

The following are representative popular products from the same brand and are useful when planning a broader automation system.

Model	Product Type	Main Function	Typical Application	Dimensions	Weight
MPL-B560F-SJ74AA	Servo Motor	Precision rotary motion	Industrial machine axes	165 mm frame; 152.4 mm stack	Approx. 40.82 kg
MPL-B560F-MK74AA	Servo Motor	Multi-turn servo positioning	Rotary and linear motion systems	165 mm class	Configuration dependent
MPL-B560F-SJ72AA	Servo Motor	Single-turn servo motion	Packaging and automation	165 mm class	Approx. 40.8 kg class
2198-H025-ERS	Servo Drive	Servo motor control	High-performance motion systems	Drive-specific	Configuration dependent
1756-L81E	Programmable Controller	Machine and process control	Industrial automation	Controller-specific	Configuration dependent

The first three models are directly related to servo motor selection.

The servo drive and programmable controller listed above represent the control side of a complete automation architecture rather than direct motor alternatives.

For a machine designer, it is often more useful to evaluate the motor, drive, controller, feedback, and mechanical load as one complete system instead of selecting the motor independently.

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19. Servo Motor Selection Guide

When selecting an alternative to the MPL-B560F-SJ74AA, the following factors should be evaluated.

Selection Parameter	MPL-B560F-SJ74AA Reference
Voltage	460 V armature / 400–480 V class
Rated Speed	3000 rpm
Continuous Stall Torque	Approx. 26.8 N·m
Frame Size	165 mm
Magnet Stack	152.4 mm
Feedback	Single-turn high-resolution
Encoder	1024 Sin/Cos
Shaft	Keyed
Brake	24 V DC
Connector	Right-angle SpeedTEC DIN
Mounting	IEC metric
Inertia	Low
Weight	Approx. 40.82 kg
Main Selection Focus	Speed, torque, inertia, feedback, brake and mechanical dimensions

The motor should be selected based on the actual machine load rather than simply matching the motor’s rated speed.

The required acceleration torque, deceleration torque, RMS torque, peak torque, load inertia, duty cycle, and mechanical transmission ratio should all be considered.

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20. Advantages for High-Cycle Machines

High-cycle machines often perform the same motion thousands or millions of times.

In these machines, a servo motor must repeatedly accelerate and decelerate without losing positioning accuracy.

The low-inertia characteristics of the MPL-B560F-SJ74AA are advantageous in these situations because the motor can respond rapidly to changing commands.

This can be particularly useful in:

• Packaging
• Pick-and-place
• Indexing
• Automated assembly
• Feeding
• Cutting
• Labeling
• Material handling

The actual achievable cycle time, however, depends on the entire motion system rather than the motor alone.

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21. Advantages for Vertical Applications

The integrated 24 V DC holding brake is particularly useful for vertical mechanisms.

A vertical load can create a continuous gravitational force that tends to move the mechanism when motor torque is removed.

A holding brake can help maintain the motor shaft position when the servo system is stopped.

Typical examples include:

• Z-axis systems
• Vertical lifting mechanisms
• Elevating platforms
• Vertical transfer equipment
• Pick-and-place machines
• Material handling systems

For safety-critical vertical machinery, additional mechanical and safety measures may be required depending on the application.

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22. Maintenance Considerations

The MPL-B560F-SJ74AA is intended for industrial service, but good maintenance practices are still important.

Regular inspection should include:

• Motor mounting condition
• Coupling alignment
• Shaft condition
• Connector condition
• Cable condition
• Brake operation
• Abnormal vibration
• Abnormal noise
• Motor temperature
• Mechanical backlash
• Encoder feedback condition

A sudden change in motor temperature, vibration, noise, or positioning accuracy can indicate a mechanical or electrical problem.

Maintenance should be performed according to the actual machine operating environment and duty cycle.

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23. Common Application Problems to Avoid

Incorrect Motor Sizing

A motor should not be selected only according to rated rpm.

The load torque and acceleration requirements must also be evaluated.

Excessive Mechanical Load

Incorrect coupling alignment or excessive radial and axial loading can reduce bearing life.

Poor Cable Routing

Improper cable routing can place unnecessary mechanical stress on the motor connectors.

Incorrect Brake Control

The holding brake should be integrated correctly into the servo-control sequence.

Insufficient Cooling

High continuous load can increase motor temperature. Adequate thermal management is important.

Incorrect Encoder Configuration

The feedback configuration must match the selected servo drive and control architecture.

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24. Quick Technical Reference

Item	Specification
Model	MPL-B560F-SJ74AA
Brand	Allen-Bradley
Family	MP-Series
Series	MPL Low-Inertia Brushless Servo Motors
Motor Type	AC Rotary Servo Motor
Voltage	460 V
Voltage Class	400/480 V AC
Frame Size	165 mm
Magnet Stack	152.4 mm
Rated Speed	3000 rpm
Continuous Stall Torque	Approx. 26.8 N·m
Feedback	Single-turn high-resolution absolute encoder
Encoder	1024 Sin/Cos cycles/revolution
Protocol	Hiperface
Shaft	Keyed shaft extension
Shaft Seal	None
Brake	24 V DC holding brake
Connector	SpeedTEC DIN
Connector Type	Right angle
Connector Rotation	180°
Mounting	IEC metric
Inertia	Low
Approx. Weight	40.82 kg
Main Dimension Reference	165 mm frame
Stack Length	152.4 mm

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25. Overall Product Evaluation

The MPL-B560F-SJ74AA is a substantial industrial servo motor designed for demanding closed-loop motion applications.

Its combination of a 165 mm frame, 152.4 mm magnet stack, 3000 rpm rated speed, approximately 26.8 N·m continuous stall torque, single-turn high-resolution encoder, keyed shaft, and 24 V DC holding brake gives it a practical configuration for many automated machine axes.

The low-inertia design is one of its most important advantages.

It allows the motor to respond quickly to changes in the motion command, making it particularly suitable for machines that perform frequent acceleration, deceleration, positioning, and reversing operations.

The single-turn high-resolution encoder provides accurate motor-position feedback, while the keyed shaft offers a familiar mechanical connection for industrial transmissions.

The integrated 24 V DC brake adds another useful feature for machines that need shaft holding, especially vertical axes.

The right-angle rotatable connector is also a practical mechanical advantage. It can simplify cable routing in compact machine designs and reduce installation difficulties around the motor.

Overall, the MPL-B560F-SJ74AA is best suited to applications where precise closed-loop motion, fast dynamic response, substantial torque capability, and mechanical holding functionality are all important.

For machine designers, the most important selection factors are the 460 V electrical class, 3000 rpm operating speed, approximately 26.8 N·m continuous stall torque, 165 mm frame size, 152.4 mm magnet stack, single-turn high-resolution feedback, keyed shaft, and 24 V DC brake.

Before final installation, the complete motor dimensions, shaft dimensions, mounting-hole pattern, cable clearance, allowable mechanical loads, thermal requirements, and drive compatibility should be checked against the actual machine design.