Introduction

The Allen Bradley MPL-A1520U-EJ74AA Servo Motor belongs to the MP-Series MPL family of low-inertia brushless servo motors. It is designed for applications where precise closed-loop motion, rapid response, and high operating speed are important.

The motor uses a 50.8 mm magnet stack and provides a rated output of approximately 0.27 kW, with continuous stall torque of approximately 0.49 N·m and peak stall torque of approximately 1.58 N·m. Its low-inertia construction allows the motor to respond quickly to changes in commanded speed and position.

A major feature of this configuration is its single-turn high-resolution absolute encoder. Feedback from the encoder allows the associated motion controller and servo drive to continuously monitor motor position and speed. This is particularly useful in automated machinery where repeatable positioning and synchronization are required.

The integrated 24 V DC brake is another important feature. The brake is intended primarily as a holding device rather than as the normal method of stopping a moving load. Proper servo-drive configuration and application-specific braking practices should be followed.

The right-angle, 180° rotatable SpeedTEC DIN connector provides additional flexibility during machine installation. This can be particularly useful in compact control systems where motor cable routing is restricted by surrounding mechanical components.

Technical Specifications

Specification	Details
Manufacturer	Allen Bradley
Product Family	MP-Series MPL
Catalog Number	MPL-A1520U-EJ74AA
Product Type	Low-Inertia AC Servo Motor
Motor Type	Brushless Permanent-Magnet Servo Motor
Voltage Class	230/240 VAC
Rated Output	0.27 kW
Rated Speed	7,000 RPM
Continuous Stall Torque	0.49 N·m
Peak Stall Torque	1.58 N·m
Continuous Stall Current	1.8 A
Peak Stall Current	6.1 A
Frame Size	63 mm / Frame 15
Magnet Stack Length	50.8 mm / 2 in.
Feedback	Single-Turn High-Resolution Absolute Encoder
Shaft	Keyed Shaft Extension
Connector	SpeedTEC DIN, Right Angle
Connector Rotation	180°
Brake	24 V DC
Mounting	IEC Metric, Free Mounting Holes
Enclosure	Keyed Shaft Extension Configuration
Dimensions	Frame size: 63 mm
Weight	1.2 kg / 2.65 lb

The motor should be matched with a compatible servo drive based on voltage, current, feedback type, motor parameters, brake requirements, and the application's mechanical load.

Recommended Related Models

The following MP-Series MPL models are useful for comparing motor output, speed, and frame configurations:

Allen Bradley MPL-A1510V – MPL low-inertia servo motor, 8,000 RPM class
Allen Bradley MPL-A1520U – MPL low-inertia servo motor, 7,000 RPM, 0.27 kW
Allen Bradley MPL-A1530U – MPL low-inertia servo motor, 7,000 RPM, 0.39 kW
Allen Bradley MPL-A210V – MPL low-inertia servo motor, 8,000 RPM, 0.37 kW
Allen Bradley MPL-A220T – MPL low-inertia servo motor, 6,000 RPM, 0.62 kW
Allen Bradley MPL-A230P – MPL low-inertia servo motor, 5,000 RPM, 0.86 kW

When selecting a replacement, the complete catalog number should be compared because feedback, brake, connector, shaft, voltage, and mounting configurations can vary between otherwise similar MPL motors.

Popular Related Models

MPL-A1520U-EJ74AA – MP-Series MPL 240V AC Rotary Servo Motor
MPL-A1510V – MP-Series MPL low-inertia servo motor
MPL-A1530U – MP-Series MPL low-inertia servo motor
MPL-A210V – MP-Series MPL low-inertia servo motor
MPL-A220T – MP-Series MPL low-inertia servo motor
MPL-A230P – MP-Series MPL low-inertia servo motor
MPL-B1520U-EJ74AA – MP-Series MPL 480V AC Rotary Servo Motor
MPL-A1520U-HJ74AA – Earlier MPL-A1520U configuration

The Allen Bradley MPL-A1520U-EJ74AA is a compact, high-speed MP-Series servo motor suited to precision automation equipment requiring low inertia, high-resolution feedback, and controlled servo motion.

Applications

The MPL-A1520U-EJ74AA is suitable for a variety of high-speed and precision motion applications, including:

Packaging Machinery – Precise positioning for indexing, filling, sealing, and cutting mechanisms.
Material Handling – Servo-driven conveyors, feeders, pick-and-place mechanisms, and positioning axes.
Printing Equipment – High-speed motion control where synchronization and positioning accuracy are important.
Assembly Machines – Provides controlled motion for automated assembly and inspection systems.
Machine Tools – Suitable for auxiliary positioning and other servo-controlled machine functions.
Robotics and Automation – Can be used for selected motion axes requiring a compact servo motor.
Textile Machinery – Supports synchronized, high-speed motion in automated textile equipment.
General OEM Machinery – Appropriate for machine builders requiring a low-inertia servo motor with absolute feedback.

Advantages

Low-Inertia Servo Design
The MPL-A1520U-EJ74AA uses a low-inertia rotor design that is well suited to applications requiring rapid acceleration, deceleration, and precise positioning.

7,000 RPM Maximum Speed
The motor is rated for operation up to 7,000 RPM, making it appropriate for high-speed motion applications when used within the applicable load and drive limits.

High-Resolution Absolute Feedback
The single-turn high-resolution encoder provides feedback for closed-loop motion control and position management.

24 V DC Holding Brake
The integrated 24 V DC brake can help hold the motor shaft when the servo system is stopped, particularly in applications where holding torque is required.

63 mm Frame Size
The compact 63 mm frame allows the motor to fit into relatively space-constrained machine designs.

Flexible Connector Arrangement
The right-angle SpeedTEC DIN connector can rotate through 180 degrees, providing additional flexibility when routing motor cables.

Keyed Shaft
The keyed shaft provides a positive mechanical connection between the servo motor and the driven machine component when the appropriate coupling or pulley is used.

IEC Metric Mounting
The IEC metric mounting arrangement facilitates integration into machinery designed around metric mechanical standards.

Technical FAQs

1. What is the Allen Bradley MPL-A1520U-EJ74AA?
It is an MP-Series MPL low-inertia brushless AC servo motor designed for industrial motion-control applications.

2. What is the rated voltage of the MPL-A1520U-EJ74AA?
The motor is designed for the 230/240 VAC class and should be paired with a compatible Allen Bradley servo drive.

3. What is the frame size of this servo motor?
The MPL-A1520U-EJ74AA has a 63 mm frame size, corresponding to Frame Size 15 in the MPL catalog structure.

4. What is the maximum speed of the MPL-A1520U-EJ74AA?
The specified maximum rated speed is 7,000 RPM.

5. What type of feedback does this servo motor use?
It uses a single-turn high-resolution absolute encoder for closed-loop motion feedback.

6. Does the MPL-A1520U-EJ74AA have a built-in brake?
Yes. It includes a 24 V DC brake for applications requiring shaft holding when the motor is not actively driving.

7. What is the magnet stack length of the MPL-A1520U-EJ74AA?
The motor has a 50.8 mm magnet stack length, equivalent to 2 inches.

8. What type of shaft does the MPL-A1520U-EJ74AA use?
The motor has a keyed shaft extension, providing a positive mechanical connection for suitable couplings and driven components.

9. What connector is used on the MPL-A1520U-EJ74AA?
The motor uses a right-angle SpeedTEC DIN connector that can be rotated through 180 degrees to accommodate different cable-routing arrangements.

10. What are the frame size and weight of the MPL-A1520U-EJ74AA?
The frame size is 63 mm, and the supplied product weight is 1.2 kg (2.65 lb).

Look forward to your comments!Comment