Introduction

The Allen Bradley MPL-B980B-SJ72AA Servo Motor is an industrial motion-control solution intended for automation systems requiring responsive rotary movement and dependable position feedback. Its low-inertia brushless design supports controlled acceleration and deceleration, while its single-turn absolute encoder provides position information for compatible servo control systems.

Operating within the 460 V AC class and configured for a nominal speed of 1000 RPM, this model combines a keyed shaft extension with a rotatable right-angle connector. It does not include an integrated holding brake, making brake requirements an important consideration during system selection.

For OEMs, maintenance engineers, and industrial equipment buyers, the MPL-B980B-SJ72AA offers a practical option when the application is designed around its specific feedback and mechanical configuration. Choosing the correct servo motor can simplify integration, support consistent machine operation, and reduce avoidable commissioning problems.

Before ordering, confirm the motor's complete catalog number and compatibility with the existing drive, feedback interface, cabling, and mechanical assembly. This approach helps ensure that the selected motor meets the actual requirements of the machine rather than relying on model-family similarities alone.

Technical Specifications

Parameter	Specification
Brand	Allen Bradley
Model	MPL-B980B-SJ72AA
Product Series	MP-Series MPL
Product Type	AC Rotary Servo Motor
Motor Design	Brushless, Low-Inertia
Voltage Class	460 V AC
Rated Speed	1000 RPM
Frame Size	300 mm
Magnet Stack Length	203.2 mm
Feedback Type	Single-Turn Absolute Encoder
Shaft Configuration	Keyed Shaft Extension
Connector Type	SpeedTEC DIN, Right-Angle, 180° Rotatable
Integrated Brake	No
Mounting	IEC Metric, Free Mounting Holes
Dimensions	Frame size: 300 mm; overall dimensions require confirmation against the applicable mechanical drawing
Weight	94.50 kg (208.34 lb)

Installation Note: The specified frame size does not establish the complete external dimensions of the motor. Check the mechanical drawing for overall length, shaft dimensions, mounting-hole positions, and connector clearance before installation. The weight is based on the supplied product data.

Recommended Related Models

The following models are useful comparison candidates within the Allen Bradley MP-Series MPL family. Their feedback and braking configurations should be checked carefully before selecting a replacement.

Model	Configuration	Selection Consideration
MPL-B980B-MJ72AA	1000 RPM, multi-turn absolute encoder, no brake	For applications requiring multi-turn position feedback
MPL-B980B-SJ74AA	1000 RPM, single-turn absolute encoder, with brake	For compatible systems requiring an integrated holding brake
MPL-B980C-SJ72AA	1500 RPM, single-turn absolute encoder, no brake	For applications designed around a higher rated speed
MPL-B980D-SJ72AA	2000 RPM, single-turn absolute encoder, no brake	For systems requiring a higher rated speed and compatible feedback

Popular Related Models

These additional MP-Series MPL motors provide options for comparing feedback type, speed rating, and brake configuration when planning maintenance or system upgrades.

Model	Configuration	Potential Application
MPL-B980B-SJ74AA	1000 RPM, single-turn absolute encoder, with brake	Motion systems requiring compatible brake functionality
MPL-B980C-SJ74AA	1500 RPM, single-turn absolute encoder, with brake	Applications requiring a higher speed rating and brake
MPL-B980D-SJ74AA	2000 RPM, single-turn absolute encoder, with brake	Suitable for evaluation in higher-speed systems designed for this configuration
MPL-B960B-SJ72AA	1000 RPM, single-turn absolute encoder, no brake	An alternative motor configuration for applications where torque and mechanical requirements permit

Selection Reminder: Similar catalog numbers do not guarantee direct interchangeability. Confirm rated torque, encoder compatibility, drive support, shaft configuration, brake requirements, mounting dimensions, and connector arrangements before purchasing.

Applications

The Allen Bradley MPL-B980B-SJ72AA Servo Motor is designed for industrial automation systems that require controlled rotary motion, repeatable positioning, and reliable feedback. As part of the MP-Series MPL low-inertia motor family, it is suited to machinery that depends on coordinated movement and consistent operating behavior.

Automated Assembly Lines: Supports accurate axis movement in automated production and assembly equipment.
Packaging Machinery: Provides controlled rotation for feeding, indexing, and product positioning mechanisms.
Material Handling Systems: Helps drive positioning and transfer mechanisms in automated equipment.
Industrial Machine Tools: Supports servo-controlled axes where repeatability and motion coordination are essential.
Printing and Converting Equipment: Can be integrated into suitable systems requiring synchronized rotary movement.
Special-Purpose Machinery: Offers a practical motion-control option for equipment designed around its electrical and mechanical specifications.

Advantages

Precise Single-Turn Position Feedback

The MPL-B980B-SJ72AA uses a single-turn absolute feedback configuration. This provides position information within one revolution, making it suitable for applications where single-turn feedback meets the machine's control requirements.

Low-Inertia Motor Design

The MP-Series MPL platform is designed for responsive motion control. Its low-inertia characteristics support frequent acceleration and deceleration, helping machinery achieve controlled movement during repetitive production cycles.

Industrial Servo Integration

Designed for the 460 V AC class, this motor can be integrated into compatible industrial servo systems. Correct drive selection is essential for achieving the required speed, torque, and feedback performance.

Flexible Cable Routing

The right-angle SpeedTEC DIN connector can be rotated through 180 degrees. This feature helps simplify cable management in compact machine enclosures and installations with restricted access.

Secure Mechanical Connection

The keyed shaft extension supports positive mechanical coupling with compatible driven components. Proper shaft alignment and coupling selection help minimize vibration and unnecessary mechanical stress.

Suitable for Demanding Automation Environments

When correctly installed and operated within its specified limits, the motor supports reliable motion control in industrial equipment. Its configuration is particularly relevant when single-turn absolute feedback is sufficient for the application.

Technical FAQs

1. What type of motor is the Allen Bradley MPL-B980B-SJ72AA?

It is a brushless AC rotary servo motor from the Allen Bradley MP-Series MPL family. It is designed for closed-loop motion control with a compatible servo drive.

2. What is the main characteristic of its feedback system?

This model uses single-turn absolute feedback. It reports angular position within one revolution rather than providing the multi-turn position range associated with a multi-turn encoder configuration.

3. What is the rated speed of this servo motor?

The model designation corresponds to a 1000 RPM configuration. The permissible operating speed and actual performance must be verified against the motor's applicable specifications and drive configuration.

4. Which voltage class is associated with this model?

It is associated with the 460 V AC class. The selected drive, power supply arrangement, and motor configuration must be electrically compatible.

5. Does the MPL-B980B-SJ72AA include an integrated brake?

No. This is a non-brake configuration. If the application requires a holding brake, an appropriate external solution or a suitable brake-equipped motor must be evaluated.

6. What type of shaft connection does it use?

The motor features a keyed shaft extension. The coupling, pulley, or driven mechanism must be compatible with the shaft dimensions and the application's torque requirements.

7. Which connector configuration is used?

It uses a right-angle SpeedTEC DIN connector with 180-degree rotational adjustment. Always confirm the required power and feedback cable assemblies before installation.

8. Can this motor replace a multi-turn absolute servo motor?

Not automatically. A single-turn encoder and a multi-turn encoder provide different position information. Replacement suitability depends on the control system, homing strategy, drive support, and machine operating requirements.

9. What should be considered when selecting a compatible servo drive?

Check voltage compatibility, continuous and peak current requirements, rated speed, torque requirements, encoder interface, feedback support, and the applicable Allen Bradley drive configuration.

10. What maintenance checks are recommended for this motor?

Inspect the power and feedback connections, shaft coupling, mounting hardware, cable condition, and operating temperature. Investigate unexpected vibration, excessive noise, or positioning errors to prevent minor issues from developing into production interruptions.

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