Product Overview

The Allen Bradley MPL-A1530U-HJ74AA belongs to the MP-Series MPL family of low-inertia rotary servo motors. It combines a compact 63 mm frame with a 76.2 mm magnet stack and high-speed 7000 RPM operation, making it appropriate for automated equipment requiring responsive and repeatable rotary motion.

A key characteristic of the HJ74AA configuration is its 24 V DC holding brake. This distinguishes it from the HJ72AA version and makes the HJ74AA more suitable for applications where shaft holding is required.

The motor uses a 2000-line incremental encoder for closed-loop feedback, while its keyed shaft and IEC metric mounting arrangement simplify integration into compatible industrial machinery. The right-angle SpeedTEC DIN connector also helps with cable management in compact machine installations.

The MPL-A1530U-HJ74AA has been discontinued by the manufacturer, with MPL-A1530U-EJ74AA identified as the replacement product. For existing installations, the original HJ74AA remains an important maintenance and replacement part, but electrical, feedback, brake, and mechanical compatibility should be verified when selecting a replacement.

Technical Specifications

Specification	MPL-A1530U-HJ74AA
Brand	Allen Bradley
Product Family	MP-Series MPL
Product Type	Rotary Servo Motor
Model	MPL-A1530U-HJ74AA
Motor Voltage	230 V AC
AC Voltage Class	240 V AC
Motor Type	Low-Inertia Brushless Servo Motor
Frame Size	63 mm
MP-Series Frame	Frame 15
Magnet Stack Length	76.2 mm
Stack Designation	30
Maximum Speed	7000 RPM
Feedback	2000-Line Incremental Encoder
Shaft Type	Keyed Shaft Extension
Shaft Seal	No Shaft Seal
Holding Brake	24 V DC
Connector	SpeedTEC DIN Connector
Connector Position	Right Angle
Connector Rotation	180° Rotatable
Mounting	IEC Metric Flange Mount
Approx. Dimensions	190 × 60 × 100 mm
Weight	1.60 kg / 3.53 lb
Lifecycle	Discontinued

The 1.60 kg motor weight makes the MPL-A1530U-HJ74AA relatively easy to integrate into compact motion assemblies while retaining the mechanical features required for industrial servo applications.

Recommended Related Models

Model	Product Type	Relationship
MPL-A1530U-EJ74AA	Servo Motor	Manufacturer-listed replacement configuration
MPL-A1530U-EJ72AA	Servo Motor	Similar 1530U configuration without holding brake
MPL-A1530U-HJ72AA	Servo Motor	Same HJ configuration without holding brake
MPL-A1530U-VJ72AA	Servo Motor	Related 1530U configuration with multi-turn feedback
MPL-A1530U-VJ74AA	Servo Motor	Related 1530U configuration with multi-turn feedback and brake

Popular Related Models

MPL-A1520U-HJ72AA — MP-Series MPL 240 V AC Rotary Servo Motor
MPL-A1520U-HJ74AA — MP-Series MPL 240 V AC Rotary Servo Motor
MPL-A1530U-EJ72AA — MP-Series MPL 240 V AC Rotary Servo Motor
MPL-A1530U-EJ74AA — MP-Series MPL 240 V AC Rotary Servo Motor
MPL-A1530U-HJ72AA — MP-Series MPL 240 V AC Rotary Servo Motor
MPL-A1530U-VJ72AA — MP-Series MPL 240 V AC Rotary Servo Motor
MPL-A1530U-VJ74AA — MP-Series MPL 240 V AC Rotary Servo Motor

When selecting a replacement for the MPL-A1530U-HJ74AA, the 24 V DC brake, 2000-line incremental encoder, 63 mm frame, 76.2 mm stack length, keyed shaft, and connector configuration should be checked carefully to ensure the replacement is appropriate for the existing motion-control system.

Industrial Motion Applications

The MPL-A1530U-HJ74AA can be used in a variety of automated equipment where accurate rotary motion and repeatable positioning are important.

Typical applications include:

Packaging and filling machines
Material handling equipment
Automated assembly systems
Pick-and-place machinery
Conveyor positioning systems
Printing and converting equipment
Labeling and dispensing machines
Machine-tool auxiliary axes
Automated inspection systems
Electronics manufacturing equipment
High-speed indexing mechanisms
Industrial production machinery

The integrated brake is particularly useful in applications where the motor shaft needs to be held when the servo system is stopped or power is removed.

Key Performance Advantages

Low-Inertia Servo Design
The MPL-A1530U-HJ74AA uses a low-inertia brushless servo motor construction that supports responsive acceleration and deceleration. This makes it suitable for machinery with frequent motion changes and demanding positioning cycles.

7000 RPM High-Speed Capability
The motor supports speeds up to 7000 RPM, providing the rotational performance needed for high-speed automated machinery and fast indexing applications.

2000-Line Incremental Encoder
The integrated 2000-line incremental encoder provides feedback for closed-loop servo control. The feedback system allows the associated servo drive to monitor motor movement and regulate position and speed.

Integrated 24 V DC Holding Brake
Unlike the HJ72AA configuration, the HJ74AA includes a 24 V DC holding brake. This feature can help prevent unwanted shaft movement when the machine requires the motor to hold a position.

Compact 63 mm Frame
The 63 mm frame provides a compact mechanical package for machines where installation space is limited while maintaining the performance characteristics expected from an industrial servo motor.

Keyed Shaft Extension
The keyed shaft provides a secure mechanical interface for compatible couplings, pulleys, gears, and other transmission components.

Right-Angle Rotatable Connector
The SpeedTEC DIN connector is arranged at a right angle and can be rotated, giving machine designers greater flexibility when routing motor cables in confined installation areas.

Technical FAQs

1. What type of servo motor is the MPL-A1530U-HJ74AA?
It is an Allen Bradley MP-Series MPL low-inertia brushless rotary servo motor designed for closed-loop industrial motion control.

2. What is the frame size of the MPL-A1530U-HJ74AA?
The motor uses a 63 mm frame, corresponding to MP-Series frame size 15.

3. What is the magnet stack length?
The MPL-A1530U-HJ74AA has a 76.2 mm magnet stack length, corresponding to the MP-Series 30 stack designation.

4. What is the maximum speed of this servo motor?
The MPL-A1530U-HJ74AA is rated for a maximum speed of 7000 RPM.

5. What type of feedback does the motor use?
It uses a 2000-line-per-revolution incremental encoder for position and speed feedback within a closed-loop servo system.

6. Does the MPL-A1530U-HJ74AA have a holding brake?
Yes. This model includes a 24 V DC holding brake. The brake can be used to hold the motor shaft in position when the servo system is not actively controlling the motor.

7. What type of shaft does this model use?
The motor has a keyed shaft extension, allowing compatible mechanical transmission components to be securely coupled to the shaft.

8. What connector is used on the MPL-A1530U-HJ74AA?
It uses a SpeedTEC DIN connector in a right-angle configuration. The connector is rotatable to provide greater flexibility during installation.

9. What voltage class does the motor belong to?
The MPL-A1530U-HJ74AA is part of the MP-Series 240 V AC motor family and has a 230 V armature voltage specification.

10. What should be checked before replacing this servo motor?
The replacement should be checked for frame and stack size, voltage class, encoder type, brake configuration, shaft arrangement, connector type, mounting configuration, and compatibility with the existing servo drive. These parameters should match the machine's motion-control requirements before commissioning.

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