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MPL-B1520U-EJ74AA Servo Motor
1. Product Overview
The MPL-B1520U-EJ74AA is a low-inertia AC rotary servo motor from the MP-Series MPL servo motor family. It is designed for industrial motion-control systems where fast acceleration, precise positioning, high-speed rotation, and reliable repeatability are required.
This model uses a 63 mm frame size with a 50.8 mm magnet stack length and is designed for a 460 V-class AC servo system. Its maximum and rated rotor speed are specified at approximately 7000 rpm, making it suitable for high-speed motion applications where a compact motor with rapid dynamic response is required.
The motor incorporates a single-turn high-resolution absolute encoder, a keyed shaft extension, and a right-angle SpeedTEC DIN connector. The connector can be rotated through 180 degrees, which provides additional flexibility when the motor is installed in machinery with limited cable-routing space.
A major difference between the MPL-B1520U-EJ72AA and the MPL-B1520U-EJ74AA is the brake configuration. The EJ74AA version incorporates a 24 V DC holding brake, while the EJ72AA configuration is the non-brake version.
The holding brake is particularly useful for vertical axes and applications where the motor must maintain the position of a mechanical load when servo power is removed.
The motor uses an IEC metric mounting arrangement with free mounting holes, commonly identified as Type FF. The shaft is keyed and is supplied without a shaft seal in the standard configuration.
The low-inertia construction is intended to reduce the amount of motor rotor inertia that the servo drive must accelerate and decelerate. This makes the motor well suited to machinery with frequent starts, stops, indexing movements, reversing operations, and rapid positioning cycles.
2. Brand and Product Series
| Item | Specification |
|---|---|
| Brand | Allen-Bradley |
| Product Family | MP-Series |
| Product Series | MPL Low-Inertia Brushless Servo Motors |
| Product Type | AC Rotary Servo Motor |
| Model | MPL-B1520U-EJ74AA |
| Motor Technology | Permanent-magnet AC servo motor |
| Voltage Class | 460 V AC class |
| Frame Size | 63 mm |
| Magnet Stack Length | 50.8 mm |
| Rated / Maximum Speed | 7000 rpm |
| Feedback | Single-turn high-resolution absolute encoder |
| Shaft | Keyed shaft extension |
| Brake | 24 V DC holding brake |
| Connector | SpeedTEC DIN, right-angle |
| Connector Rotation | 180° rotatable |
| Mounting | IEC metric, Type FF, free mounting holes |
| Servo Motor Class | Low-inertia |
The MPL product family is designed around compact brushless servo motors for demanding motion-control applications. The B configuration represents the high-voltage-class MPL motor family, while the 15 frame designation corresponds to the 63 mm frame size.
The 20 portion of the model designation corresponds to a 50.8 mm magnet stack, while the U configuration corresponds to the 7000 rpm motor class.
The E configuration identifies the single-turn high-resolution feedback arrangement, while the J configuration identifies the keyed shaft arrangement. The 74 configuration identifies the version equipped with a 24 V DC holding brake.
3. Detailed Technical Parameters
| Parameter | MPL-B1520U-EJ74AA |
|---|---|
| Model | MPL-B1520U-EJ74AA |
| Brand | Allen-Bradley |
| Series | MP-Series MPL |
| Motor Type | Low-inertia brushless AC rotary servo motor |
| Voltage Class | 460 V AC |
| Motor Speed | 7000 rpm |
| Frame Size | 63 mm |
| Magnet Stack Length | 50.8 mm |
| Continuous Stall Torque | Approx. 0.49 Nm |
| Peak Stall Torque | Approx. 1.58 Nm |
| Rated Motor Output | Approx. 0.27 kW |
| Continuous Current | Approx. 1.8 A |
| Feedback | Single-turn high-resolution absolute encoder |
| Feedback Technology | 128 sin/cos / absolute single-turn encoder configuration |
| Shaft Type | Keyed shaft |
| Shaft Seal | Standard configuration without shaft seal |
| Holding Brake | 24 V DC |
| Brake Type | Holding brake |
| Connector | Circular SpeedTEC DIN connector |
| Connector Orientation | Right-angle |
| Connector Adjustment | 180° rotatable |
| Mounting Flange | IEC metric |
| Mounting Type | Type FF / free mounting holes |
| Protection | Standard enclosure protection depends on installation configuration |
| Enhanced Protection | Up to IP66 with appropriate shaft sealing and sealed cable arrangement |
| Approx. Physical Size | Approx. 63 × 63 × 165 mm overall envelope |
| Weight | Approx. 1.2 kg |
| Construction | Permanent-magnet brushless servo motor |
| Application Class | Industrial motion control |
| Operating Mode | Continuous-duty servo operation |
| Rotation | Rotary |
| Installation | Flange mounted |
| Recommended Drive | Compatible high-voltage servo drive within the applicable motion-control family |
The 63 mm frame size and 50.8 mm stack length are the key mechanical identifiers of this particular motor. The overall physical envelope is approximately 63 × 63 × 165 mm; exact shaft projection, mounting-hole locations, connector clearance, and installation dimensions should be taken from the mechanical drawing for a production installation.
The approximately 1.2 kg motor weight makes this a relatively compact servo motor for applications where machine designers need to reduce moving mass while retaining a high-speed servo capability.
The electrical and mechanical values above are intended as a practical product-reference table. Individual installation requirements should always be checked against the applicable motor revision and mechanical configuration.
4. Model Number Explanation
The model number can be understood as a configuration identifier rather than simply a serial number.
| Model Code | Meaning |
|---|---|
| MPL | MPL low-inertia brushless servo motor family |
| B | 460 V-class motor family |
| 15 | 63 mm frame size |
| 20 | 50.8 mm magnet stack |
| U | 7000 rpm speed class |
| E | Single-turn high-resolution encoder |
| J | Keyed shaft |
| 7 | SpeedTEC DIN connector configuration |
| 4 | 24 V DC holding brake |
| AA | Standard configuration designation |
This coding structure is useful when comparing closely related MPL motors.
For example, the EJ74AA configuration combines a single-turn high-resolution encoder, keyed shaft, SpeedTEC connector arrangement, and 24 V DC holding brake.
The brake is one of the most important configuration characteristics to consider when replacing this motor with another MPL model. A motor with the same frame size and stack length is not necessarily a direct electrical or mechanical replacement if its feedback, connector, shaft, or brake configuration is different.
5. Product Construction and Design
The MPL-B1520U-EJ74AA uses a permanent-magnet brushless servo motor construction.
Instead of relying on brushes and a mechanical commutator, the motor is electronically controlled through the servo drive. This allows the motor to provide rapid changes in torque and speed while maintaining accurate control of position and velocity.
The relatively low rotor inertia is particularly valuable in applications where the motor must accelerate and decelerate its load repeatedly.
A lower-inertia motor can reduce the amount of energy required to change motor speed and can help the servo control system respond rapidly to command changes.
The 63 mm frame provides a compact mechanical footprint, making the motor suitable for machines where cabinet space and axis envelope are limited.
The 50.8 mm magnet stack gives the motor a moderate active magnetic length within the compact frame. This configuration is positioned between shorter and longer MPL motor variants, allowing machine builders to select a motor based on the required torque and dynamic performance.
6. Encoder and Feedback System
The MPL-B1520U-EJ74AA uses a single-turn high-resolution absolute encoder.
The feedback device is a critical part of the servo system because the drive continuously uses encoder information to determine motor position and speed.
High-resolution feedback allows the control system to make small corrections to motor position and velocity. This is especially important in indexing machinery, coordinated axes, electronic gearing, electronic camming, and other applications where accurate synchronization is required.
The single-turn design is intended to provide absolute position information within one revolution.
When selecting a replacement motor, it is important to match the feedback configuration with the servo drive. A motor with a different encoder type may not be electrically interchangeable even when the frame and shaft dimensions are similar.
7. Holding Brake
One of the most useful features of the MPL-B1520U-EJ74AA is the integrated 24 V DC holding brake.
The brake is designed primarily as a holding device rather than as a normal dynamic stopping mechanism.
For example, a vertical machine axis may need to remain stationary when servo power is removed. Without a holding mechanism, gravity can cause the axis to move. A holding brake can help maintain the axis position when the motor is not energized.
Typical applications include vertical slides, lifting mechanisms, positioning stages, indexing mechanisms, and other axes where load holding is important.
The brake should be controlled according to the applicable servo system and machine safety design. It should not automatically be treated as the primary emergency stopping device.
8. Shaft and Mechanical Mounting
The motor uses a keyed shaft extension.
A keyed shaft provides a positive mechanical interface between the motor shaft and the driven component when used with a properly designed coupling, pulley, gearbox, or other transmission component.
The motor uses an IEC metric mounting flange with free mounting holes.
This configuration provides flexibility when mounting the motor to a machine plate, gearbox, actuator, or other mechanical structure.
The shaft should not be used as a lifting point.
During installation, the motor should be properly supported by the mounting structure before power is applied. Coupling alignment is also important because excessive radial or axial loading can shorten bearing life and reduce overall system reliability.
9. Connector Configuration
The motor is equipped with a SpeedTEC DIN connector in a right-angle configuration.
The connector is designed to be rotated through approximately 180 degrees.
This is useful in compact machinery because servo motors are often installed in locations where a straight connector would interfere with the machine frame, guarding, cable tray, gearbox, or adjacent axis.
The rotatable connector arrangement gives the machine builder more flexibility in cable routing.
Correct cable routing is important because servo cables should be protected from excessive bending, abrasion, heat, sharp edges, and mechanical interference.
10. Protection and Environmental Considerations
The standard motor configuration provides industrial enclosure protection suitable for normal machine environments when installed correctly.
Depending on the installation orientation and sealing configuration, the base enclosure rating can vary.
With the appropriate shaft seal and environmentally sealed cable connections, the motor can be configured for significantly higher environmental protection, including applications requiring an IP66-level arrangement.
The standard shaft configuration does not include a shaft seal.
This distinction is important when the motor is installed in environments containing washdown fluids, dust, moisture, coolant, or other contaminants.
For demanding environments, the complete motor, shaft seal, cable connector, mounting orientation, and machine enclosure should be considered together rather than evaluating the motor enclosure rating alone.
11. Product Applications
Packaging Machinery
The MPL-B1520U-EJ74AA is well suited to packaging equipment where high-speed positioning and repeatable movement are required.
Typical uses can include indexing mechanisms, film handling, product positioning, cutting mechanisms, sealing systems, labeling equipment, and coordinated conveyor axes.
The 7000 rpm speed capability provides substantial speed headroom for high-cycle machine operations.
The encoder provides the feedback required for accurate synchronization between the servo motor and the machine controller.
Printing and Converting Equipment
Servo motors are commonly used in printing, slitting, rewinding, and converting equipment where several rotating axes must operate in synchronization.
The low-inertia design is useful for rapid speed changes and repeated acceleration and deceleration.
The encoder feedback allows the motion controller to maintain accurate synchronization between axes.
Material Handling
The motor can be applied to automated material-handling mechanisms where precise indexing or positioning is required.
Examples include transfer mechanisms, indexing tables, automated feeders, positioning axes, and conveyor-related motion systems.
For vertical material-handling applications, the integrated 24 V DC holding brake can provide an important mechanical holding function when the axis is not energized.
Assembly Machinery
Automated assembly equipment frequently requires multiple servo axes to operate in a carefully controlled sequence.
The MPL-B1520U-EJ74AA can be used for positioning slides, indexing systems, rotary mechanisms, pick-and-place movements, and controlled insertion operations.
The combination of high-resolution feedback and low-inertia motor construction is useful where the machine must repeatedly reach the same position with short cycle times.
Robotics and Automated Motion
The motor can also be used in automated machinery involving repeated rotary motion and coordinated positioning.
Its compact 63 mm frame allows it to fit into machine designs where a larger servo motor would increase axis size or moving mass.
The exact suitability for robotic applications depends on the required torque, inertia ratio, duty cycle, acceleration, gearbox arrangement, and servo-drive compatibility.
CNC and Machine Tools
The motor can be considered for auxiliary motion axes and other high-speed positioning functions in machine tools.
Applications can include auxiliary positioning, indexing, tool-related mechanisms, feeders, and other controlled rotary axes.
For demanding CNC applications, motor selection should be based on the complete torque-speed curve and the actual mechanical load rather than motor speed alone.
Semiconductor and Electronics Equipment
Precision automation equipment often requires compact motors capable of fast, repeatable positioning.
The relatively small frame size of the MPL-B1520U-EJ74AA makes it useful where machine designers need to conserve installation space.
Its feedback system supports closed-loop motion control, while the low-inertia construction supports rapid response.
12. Main Advantages
12.1 Low-Inertia Construction
The low-inertia design is one of the principal advantages of the MPL family.
Low rotor inertia allows the servo system to change speed rapidly, which is useful for machines with frequent indexing and short production cycles.
This can be especially beneficial when the machine repeatedly performs acceleration, positioning, deceleration, and reversal.
12.2 High-Speed Operation
The 7000 rpm speed class gives the motor a high operating-speed capability.
High motor speed can be useful when the mechanical system requires fast rotary movement or when a gearbox or other transmission is used to convert motor speed into the required machine speed.
The actual operating speed should always be selected according to the load, duty cycle, drive configuration, and applicable motor performance curve.
12.3 High-Resolution Feedback
The single-turn high-resolution encoder provides detailed motor-position feedback.
This supports closed-loop servo control and allows the drive to make continuous corrections based on actual motor position and speed.
This is valuable in precision positioning applications where open-loop motor control would not provide sufficient accuracy or repeatability.
12.4 Integrated Holding Brake
The 24 V DC holding brake adds functionality for applications where the motor must hold a load after servo power is removed.
This is particularly useful for vertical axes.
The brake can also simplify the mechanical design of some machines by providing an integrated holding function rather than requiring a separate external brake.
12.5 Compact 63 mm Frame
The 63 mm frame is relatively compact and allows the motor to be installed in machinery where space is limited.
A compact servo motor can help reduce machine width, axis spacing, and overall equipment size.
This is particularly valuable in multi-axis machines where several motors must be installed close to one another.
12.6 Flexible Connector Arrangement
The 180-degree rotatable right-angle connector provides greater flexibility for cable routing.
This can simplify mechanical integration and reduce the likelihood of connector interference with nearby components.
12.7 Keyed Shaft
The keyed shaft provides a familiar mechanical connection method for couplings and other transmission components.
For many industrial machines, a keyed shaft is straightforward to integrate and maintain.
13. Related Models in the Same MPL Series
The following models are closely related configurations within the MPL servo motor family.
They are useful for comparison because they use similar product architecture while changing characteristics such as brake configuration, feedback configuration, stack length, or speed class.
| Model | Voltage Class | Frame | Stack Length | Speed | Feedback | Brake | Connector | Approx. Dimensions | Weight |
|---|---|---|---|---|---|---|---|---|---|
| MPL-B1510V-EJ72AA | 460 V | 63 mm | 25.4 mm | 8000 rpm | Single-turn high-resolution | No brake | SpeedTEC DIN | Approx. 63 × 63 mm frame; shorter body than 20-stack | Approx. 1.0 kg |
| MPL-B1510V-EJ74AA | 460 V | 63 mm | 25.4 mm | 8000 rpm | Single-turn high-resolution | 24 V DC | SpeedTEC DIN | Approx. 63 × 63 mm frame; short-stack body | Approx. 1.0 kg |
| MPL-B1520U-EJ72AA | 460 V | 63 mm | 50.8 mm | 7000 rpm | Single-turn high-resolution | No brake | SpeedTEC DIN | Approx. 63 × 63 × 165 mm | Approx. 1.2 kg |
| MPL-B1530U-EJ72AA | 460 V | 63 mm | 76.2 mm | 7000 rpm | Single-turn high-resolution | No brake | SpeedTEC DIN | Approx. 63 × 63 mm frame; longer body than 20-stack | Approx. 1.4 kg |
| MPL-B1530U-EJ74AA | 460 V | 63 mm | 76.2 mm | 7000 rpm | Single-turn high-resolution | 24 V DC | SpeedTEC DIN | Approx. 63 × 63 mm frame; longer body than 20-stack | Approx. 1.5 kg |
The models above are closely related to the target motor because they share the same general MPL architecture and 63 mm frame class.
The MPL-B1510V models use a shorter magnet stack and a higher 8000 rpm speed class.
The MPL-B1520U models use the 50.8 mm stack and 7000 rpm speed class.
The MPL-B1530U models use the longer 76.2 mm stack while retaining the 7000 rpm class.
The EJ72AA and EJ74AA suffixes are particularly useful for distinguishing non-brake and holding-brake configurations.
For a direct replacement, however, the complete part number should be matched rather than selecting a motor based only on frame size.
14. Five Same-Brand Models for Comparison
The following five models are useful additional products to compare within the same brand’s servo-motor range.
They represent different MPL configurations and can be considered when the required speed, feedback type, brake arrangement, or motor size changes.
| Model | Product Family | Voltage Class | Frame / Stack | Speed | Feedback | Brake | Approx. Dimensions | Weight |
|---|---|---|---|---|---|---|---|---|
| MPL-B1510V-EJ74AA | MP-Series MPL | 460 V | 63 mm / 25.4 mm | 8000 rpm | Single-turn high-resolution | 24 V DC | Approx. 63 × 63 mm frame; short body | Approx. 1.0 kg |
| MPL-B1520U-VJ74AA | MP-Series MPL | 460 V | 63 mm / 50.8 mm | 7000 rpm | Multi-turn high-resolution | 24 V DC | Approx. 63 × 63 × 165 mm | Approx. 1.2 kg |
| MPL-B1530U-EJ74AA | MP-Series MPL | 460 V | 63 mm / 76.2 mm | 7000 rpm | Single-turn high-resolution | 24 V DC | Approx. 63 × 63 mm frame; extended body | Approx. 1.5 kg |
| MPL-B1530U-VJ74AA | MP-Series MPL | 460 V | 63 mm / 76.2 mm | 7000 rpm | Multi-turn high-resolution | 24 V DC | Approx. 63 × 63 mm frame; extended body | Approx. 1.5 kg |
| MPL-B220T-EJ74AA | MP-Series MPL | 460 V | Larger frame / 50.8 mm class | 6000 rpm class | Single-turn high-resolution | 24 V DC | Larger than 63 mm frame configuration | Approx. 2 kg class |
The comparison is intended to show how the MPL family changes as the machine requirement changes.
The VJ74AA configuration is particularly relevant when a multi-turn feedback arrangement is needed.
The EJ74AA configuration is more appropriate when a single-turn high-resolution feedback arrangement is required.
The longer-stack MPL-B1530U configuration can be considered when a machine requires a higher-torque motor within the same general frame family.
For the larger-frame MPL models, the exact dimensions and weight depend on the particular frame, stack, feedback, shaft, and brake configuration. These values should be confirmed against the mechanical drawing before replacement or machine redesign.
15. MPL-B1520U-EJ72AA vs MPL-B1520U-EJ74AA
A particularly useful comparison is between the target motor and its closely related non-brake version.
| Parameter | MPL-B1520U-EJ72AA | MPL-B1520U-EJ74AA |
|---|---|---|
| Voltage Class | 460 V | 460 V |
| Frame Size | 63 mm | 63 mm |
| Stack Length | 50.8 mm | 50.8 mm |
| Speed | 7000 rpm | 7000 rpm |
| Encoder | Single-turn high-resolution | Single-turn high-resolution |
| Shaft | Keyed | Keyed |
| Connector | SpeedTEC DIN | SpeedTEC DIN |
| Brake | No brake | 24 V DC holding brake |
| Approx. Dimensions | Approx. 63 × 63 × 165 mm | Approx. 63 × 63 × 165 mm |
| Approx. Weight | Approx. 1.2 kg | Approx. 1.2 kg |
The two models are mechanically very similar in the basic motor configuration.
The most significant distinction is the integrated holding brake.
When replacing an EJ72AA motor with an EJ74AA motor, the brake wiring and drive-control arrangement must be considered.
Conversely, replacing an EJ74AA with a non-brake version can remove an important load-holding function and therefore should not be treated as a simple drop-in substitution.
16. Selection Considerations
When selecting the MPL-B1520U-EJ74AA for a machine, motor speed is only one part of the selection process.
The required continuous torque, peak torque, acceleration, deceleration, load inertia, duty cycle, gearbox ratio, mechanical transmission efficiency, and required positioning accuracy should all be considered.
The motor’s continuous torque capability should be sufficient for the continuous portion of the application, while the peak torque capability should accommodate short acceleration and transient load requirements.
The inertia ratio between the motor and machine load is also important.
A low-inertia servo motor can provide fast response, but the actual performance depends heavily on how the motor is coupled to the load.
A very large load inertia can reduce servo response and may require mechanical gearing, a different motor size, or a different control strategy.
17. Typical Application Matching
| Application | Suitability | Important Considerations |
|---|---|---|
| Packaging machines | High | High-speed indexing and positioning |
| Labeling equipment | High | Encoder feedback and repeatability |
| Assembly machines | High | Rapid positioning and short cycles |
| Rotary indexing tables | High | Speed and repeatable positioning |
| Conveyor positioning | High | Acceleration and synchronization |
| Vertical axis | High | Holding brake is particularly useful |
| Material handling | High | Load inertia and acceleration |
| Printing equipment | High | Electronic synchronization |
| CNC auxiliary axis | Suitable | Torque-speed requirements must be checked |
| Robotics | Suitable | Inertia, gearbox and duty cycle must be evaluated |
| Semiconductor machinery | Suitable | Mechanical environment and positioning requirements must be evaluated |
18. Installation Considerations
The motor should be installed on a rigid mounting surface capable of handling the mechanical loads generated during acceleration and deceleration.
The shaft should be properly aligned with the driven machine component.
Misalignment can increase bearing loads, produce vibration, and shorten motor service life.
The motor shaft should not be subjected to loads beyond its permitted radial and axial limits.
Cable routing should also be planned before installation.
The right-angle connector provides useful flexibility, but sufficient clearance should still be maintained around the connector and cable.
The brake wiring must be handled separately from the normal motor power connection according to the applicable servo system design.
19. Maintenance Considerations
Servo motors generally require less routine mechanical maintenance than traditional brushed motors because there are no mechanical brushes that need periodic replacement.
Nevertheless, the motor should be inspected as part of normal machine maintenance.
Important inspection points include connector condition, cable condition, mounting bolts, shaft coupling, abnormal vibration, bearing noise, temperature, and brake operation.
In environments with moisture or washdown exposure, shaft sealing and connector sealing should receive additional attention.
The motor should also be kept within the specified environmental conditions of the complete servo system.
20. Why the MPL-B1520U-EJ74AA Is Used in Industrial Motion Systems
The MPL-B1520U-EJ74AA combines a compact 63 mm mechanical frame, a 50.8 mm magnet stack, high-speed 7000 rpm operation, high-resolution single-turn feedback, keyed shaft construction, and a 24 V DC holding brake.
This combination gives the motor a useful balance between compact size, dynamic response, positioning capability, and mechanical holding functionality.
It is especially appropriate for machines where the servo axis needs to move rapidly and repeatedly but also needs a brake to maintain position when the servo system is de-energized.
The low-inertia design is also beneficial for machines with frequent acceleration and deceleration.
For machine builders, the compact frame can help reduce the size of the mechanical axis while the encoder and servo-drive architecture provide the closed-loop control necessary for precise automated motion.
21. Product Summary
| Category | MPL-B1520U-EJ74AA |
|---|---|
| Model | MPL-B1520U-EJ74AA |
| Brand | Allen-Bradley |
| Series | MP-Series MPL |
| Product Type | Low-inertia AC rotary servo motor |
| Voltage | 460 V class |
| Speed | 7000 rpm |
| Frame | 63 mm |
| Stack | 50.8 mm |
| Continuous Stall Torque | Approx. 0.49 Nm |
| Peak Stall Torque | Approx. 1.58 Nm |
| Output | Approx. 0.27 kW |
| Feedback | Single-turn high-resolution absolute encoder |
| Shaft | Keyed |
| Brake | 24 V DC holding brake |
| Connector | Right-angle SpeedTEC DIN |
| Connector Rotation | 180° |
| Mounting | IEC metric Type FF |
| Approx. Dimensions | 63 × 63 × 165 mm |
| Approx. Weight | 1.2 kg |
| Design | Low-inertia brushless permanent-magnet servo |
| Typical Uses | Packaging, assembly, indexing, material handling, printing, positioning and automated machinery |
22. Final Product Description
The MPL-B1520U-EJ74AA is a compact, high-speed, low-inertia servo motor intended for precision industrial motion control.
Its 63 mm frame and 50.8 mm magnet stack provide a compact mechanical package, while the 7000 rpm operating class allows the motor to support fast machine cycles.
The single-turn high-resolution encoder provides the feedback required for closed-loop servo operation, while the keyed shaft provides a conventional mechanical connection for couplings and transmission components.
The integrated 24 V DC holding brake is an important feature for applications involving vertical axes, gravity-loaded mechanisms, positioning stages, and other equipment where the mechanical load needs to remain stationary after the servo motor is de-energized.
The rotatable right-angle SpeedTEC DIN connector also gives the motor good mechanical installation flexibility, particularly in compact multi-axis equipment.
For replacement work, the complete model number should always be matched carefully. Frame size alone is not sufficient because encoder type, brake, connector configuration, shaft arrangement, voltage class, and stack length can all affect electrical and mechanical compatibility.
Overall, the MPL-B1520U-EJ74AA is best viewed as a compact 460 V-class, 7000 rpm, low-inertia servo motor with single-turn high-resolution feedback and an integrated 24 V DC holding brake, intended for demanding automated machinery where precise and repeatable rotary motion is required.