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Allen-Bradley MPL-B4530F-MK74AA Servo Motor
Detailed Technical Specifications, Product Introduction, Applications, Advantages, Series Information and Related Models
1. Product Overview
The Allen-Bradley MPL-B4530F-MK74AA is a low-inertia brushless AC servo motor designed for demanding industrial motion-control applications where accurate positioning, rapid acceleration, stable torque output, and reliable feedback are required.
It belongs to the MP-Series MPL Low-Inertia Brushless Servo Motor family and is designed for a 400/480 V-class servo system with a nominal armature voltage of 460 V AC.
The motor uses a 130 mm frame size, a 76.2 mm magnet stack length, and a 3000 rpm speed class. Its low-inertia rotor construction is intended to provide responsive acceleration and deceleration, making it suitable for machines that repeatedly start, stop, reverse, index, and reposition.
A particularly important feature of this model is the multi-turn high-resolution absolute encoder. The encoder provides position feedback through a high-resolution Sin/Cos signal arrangement and Hiperface-type feedback interface.
Another important characteristic is the keyless shaft extension. Unlike keyed versions of the same general motor family, the MPL-B4530F-MK74AA is supplied without a shaft key. This configuration can be useful when the mechanical transmission system uses a compatible keyless coupling or clamping connection.
The motor also incorporates a 24 V DC holding brake, making it particularly useful for applications where an axis must remain mechanically held when the servo system is disabled.
2. Brand and Product Series
| Item | Description |
|---|---|
| Brand | Allen-Bradley |
| Product Family | MP-Series |
| Motor Series | MPL Low-Inertia Brushless Servo Motors |
| Product Type | Rotary AC servo motor |
| Motor Technology | Permanent-magnet brushless AC servo |
| Voltage Class | 400/480 V AC class |
| Armature Voltage | 460 V AC |
| Frame Size | 45 |
| Frame Dimension | 130 mm / 5.12 in. class |
| Magnet Stack | 30 / 76.2 mm / 3.0 in. |
| Rated Speed | 3000 rpm |
| Feedback | Multi-turn high-resolution absolute encoder |
| Shaft Configuration | Keyless shaft extension |
| Brake | 24 V DC holding brake |
| Connector | SpeedTEC DIN right-angle connector |
| Connector Adjustment | 180° rotatable |
| Mounting | IEC metric flange |
| Mounting Hole Type | Free mounting holes / FF |
| Motor Construction | Low-inertia brushless design |
The MPL series is intended for high-performance motion systems where the motor must do more than simply provide continuous rotary motion.
The motor works as part of a closed-loop servo system, allowing the controller and drive to monitor motor position and adjust torque and speed continuously.
3. Main Technical Parameters
| Parameter | MPL-B4530F-MK74AA |
|---|---|
| Model | MPL-B4530F-MK74AA |
| Brand | Allen-Bradley |
| Series | MP-Series MPL |
| Motor Type | Low-inertia brushless AC servo motor |
| Voltage Class | 400 V AC class |
| Armature Voltage | 460 V AC |
| Rated Speed | 3000 rpm |
| Maximum Speed | 3000 rpm class |
| Continuous Stall Torque | 8.25 N·m |
| Peak Stall Torque | 20.3 N·m |
| Rated Motor Output | Approximately 2.1 kW |
| Frame Size | 45 |
| Frame Dimension | 130 mm / 5.12 in. |
| Magnet Stack Length | 76.2 mm / 3.0 in. |
| Feedback Type | Absolute multi-turn |
| Encoder Type | High-resolution Sin/Cos encoder |
| Encoder Resolution | 1024 Sin/Cos cycles/revolution |
| Feedback Protocol | Hiperface |
| Shaft Type | Keyless shaft extension |
| Shaft Key | None |
| Shaft Seal | None |
| Brake | 24 V DC holding brake |
| Connector | SpeedTEC DIN |
| Connector Style | Right-angle |
| Connector Rotation | 180° |
| Mounting | IEC metric flange |
| Flange Type | Free mounting holes / FF |
| Rotor Type | Low inertia |
| Rotor Inertia | Approximately 0.00040 kg·m² |
| Approximate Weight | 6.80 kg |
| Typical Application | Industrial servo motion control |
The 8.25 N·m continuous stall torque and approximately 20.3 N·m peak stall torque provide a useful combination of continuous load capability and short-duration acceleration torque.
The motor’s 3000 rpm operating class makes it a balanced choice for applications where torque and dynamic response are more important than extremely high rotational speed.
4. Dimensions and Weight
The MPL-B4530F-MK74AA uses a 130 mm frame size with a 76.2 mm magnet stack.
The frame size provides a useful combination of mechanical strength, torque capability, and installation space.
| Mechanical Parameter | Specification |
|---|---|
| Model | MPL-B4530F-MK74AA |
| Frame Size | 45 |
| Frame Dimension | 130 mm / 5.12 in. class |
| Magnet Stack Length | 76.2 mm / 3.0 in. |
| Mounting Standard | IEC Metric |
| Mounting Type | Flange mounting |
| Mounting Hole Style | Free mounting holes / FF |
| Shaft Type | Keyless |
| Shaft Key | None |
| Shaft Seal | None |
| Brake | 24 V DC holding brake |
| Connector | Right-angle SpeedTEC DIN |
| Connector Rotation | 180° |
| Approximate Weight | 6.80 kg |
The approximately 6.80 kg motor weight should be considered when designing the machine mounting structure.
The motor should be installed on a rigid mounting surface capable of handling both the motor mass and the mechanical forces generated by acceleration, deceleration, and connected machinery.
5. Electrical and Performance Specifications
The MPL-B4530F-MK74AA is designed for a 460 V AC armature voltage class and a rated speed of approximately 3000 rpm.
Its continuous stall torque is approximately 8.25 N·m, while peak stall torque reaches approximately 20.3 N·m.
| Performance Parameter | Specification |
|---|---|
| Model | MPL-B4530F-MK74AA |
| Armature Voltage | 460 V AC |
| Voltage Class | 400 V AC class |
| Rated Speed | 3000 rpm |
| Continuous Stall Torque | 8.25 N·m |
| Peak Stall Torque | 20.3 N·m |
| Motor Rated Output | Approx. 2.1 kW |
| Rotor Inertia | Approx. 0.00040 kg·m² |
| Frame | 130 mm |
| Magnet Stack | 76.2 mm |
| Weight | Approx. 6.80 kg |
The low rotor inertia is important in servo applications because the motor frequently needs to change speed.
For machines performing repeated indexing or positioning operations, reducing unnecessary rotor inertia can help improve dynamic response and reduce the amount of time required for the axis to settle at its target position.
6. Feedback System
The MPL-B4530F-MK74AA uses a multi-turn high-resolution absolute encoder.
The feedback system provides position information to the servo control system, allowing the drive to monitor the motor’s actual position and movement.
| Feedback Parameter | Specification |
|---|---|
| Model | MPL-B4530F-MK74AA |
| Feedback Type | Absolute multi-turn |
| Encoder Type | High-resolution encoder |
| Encoder Signal | Sin/Cos |
| Resolution | 1024 cycles/revolution |
| Feedback Protocol | Hiperface |
| Position Capability | Multi-turn absolute position |
| Main Function | Closed-loop position, speed, and torque control |
| Typical Benefit | Accurate and repeatable machine positioning |
The absolute multi-turn configuration is especially useful for automated equipment where the machine needs reliable position information across multiple revolutions.
This can be valuable for indexing systems, rotary mechanisms, positioning axes, packaging machines, assembly systems, and other automated equipment.
7. Keyless Shaft Configuration
The K in the model configuration identifies the keyless shaft extension.
This is one of the most important differences between the MPL-B4530F-MK74AA and related keyed-shaft configurations.
| Shaft Parameter | Specification |
|---|---|
| Model | MPL-B4530F-MK74AA |
| Shaft Type | Keyless shaft extension |
| Shaft Key | No |
| Shaft Seal | No |
| Typical Connection | Compatible keyless coupling / clamping connection |
| Main Benefit | Smooth shaft surface and flexible coupling arrangement |
| Typical Use | Precision servo transmission systems |
A keyless shaft can be advantageous when the machine uses a clamping-style coupling or other keyless mechanical transmission arrangement.
It can also simplify certain alignment and assembly procedures because the shaft does not require a keyway.
However, the coupling must be properly selected for the actual torque, speed, radial load, axial load, and acceleration requirements of the machine.
A keyless shaft should not automatically be treated as interchangeable with a keyed shaft. The mechanical coupling and machine transmission must be compatible with the shaft configuration.
8. Integrated 24 V DC Holding Brake
The MPL-B4530F-MK74AA includes a 24 V DC holding brake.
The brake is primarily intended to hold the motor shaft when the servo motor is not actively producing torque.
| Brake Parameter | Specification |
|---|---|
| Model | MPL-B4530F-MK74AA |
| Brake Type | Integrated holding brake |
| Brake Voltage | 24 V DC |
| Primary Function | Shaft holding |
| Typical Application | Vertical axes |
| Suitable Machine Types | Lifting mechanisms, Z axes, positioning systems |
| Main Advantage | Helps prevent unwanted movement when motor torque is removed |
This feature is particularly useful for vertical machine axes.
For example, a vertical positioning axis may have a load that tends to move downward under gravity. When servo torque is removed, the holding brake can help keep the axis in position.
The brake should be incorporated into the machine’s overall stopping and safety strategy rather than being treated as a standalone safety device.
9. Connector Configuration
The motor uses a SpeedTEC DIN right-angle connector with approximately 180° rotational adjustment.
This arrangement is helpful when cable space is limited.
| Connector Parameter | Specification |
|---|---|
| Model | MPL-B4530F-MK74AA |
| Connector Type | SpeedTEC DIN |
| Configuration | Right-angle |
| Rotation | 180° |
| Connection Style | Quick-connect |
| Installation Advantage | Flexible cable routing |
| Typical Application | Compact machine installations |
The rotatable connector allows the installer to position the connector in a direction that best suits the available cable-routing space.
This is useful when multiple servo motors are installed close to one another or when the motor is mounted inside a narrow machine frame.
10. Product Introduction
The MPL-B4530F-MK74AA is a compact industrial servo motor intended for high-performance automated machinery.
Its combination of low inertia, 3000 rpm speed capability, substantial torque, high-resolution absolute feedback, and integrated brake makes it suitable for applications requiring precise and repeatable motion.
The motor is particularly useful when the machine needs frequent acceleration and deceleration.
Unlike a simple induction motor, the servo motor is designed to operate as part of a closed-loop control system.
The servo drive receives position information from the motor’s encoder and adjusts the electrical output to maintain the commanded motion.
This allows the motor to participate in:
- Position control
- Speed control
- Torque control
- Electronic gearing
- Electronic camming
- Coordinated multi-axis motion
- High-speed indexing
- Precision positioning
11. Low-Inertia Servo Motor Design
The MPL series is built around a low-inertia motor concept.
The purpose of low rotor inertia is to improve dynamic response.
When a machine changes speed, the motor must accelerate or decelerate its rotor.
A lower rotor inertia means the servo system can change motor speed with less rotational energy involved.
This is useful for applications involving:
- Rapid acceleration
- Rapid deceleration
- Frequent reversing
- Short positioning moves
- High-cycle indexing
- Repetitive production operations
- Synchronization between multiple axes
The approximately 0.00040 kg·m² rotor inertia is one of the reasons this motor is appropriate for dynamic motion-control applications.
12. Main Product Advantages
12.1 Low-Inertia Response
The low-inertia rotor supports rapid changes in speed and direction.
This can help improve machine cycle time and positioning response.
12.2 Strong Torque Capability
The motor provides approximately 8.25 N·m continuous stall torque and approximately 20.3 N·m peak stall torque.
This gives the motor a good balance between continuous load handling and short-duration acceleration capability.
12.3 3000 rpm Speed Class
The 3000 rpm rating makes the motor suitable for a wide range of industrial servo axes.
It is particularly well suited to machines that require useful torque at moderate-to-high servo speeds.
12.4 Absolute Multi-Turn Feedback
The multi-turn absolute encoder provides detailed position feedback.
This is particularly valuable for automated equipment where repeatable positioning is critical.
12.5 Keyless Shaft
The keyless shaft configuration provides an alternative mechanical connection for systems using clamping-style couplings.
This can be useful for precision transmission systems where a smooth shaft arrangement is preferred.
12.6 Integrated Holding Brake
The 24 V DC holding brake makes the motor suitable for applications where the axis must remain stationary after the servo system is disabled.
Vertical axes are a particularly common example.
12.7 Compact Industrial Package
The 130 mm frame provides a useful balance between motor size and torque capability.
This makes the motor suitable for many machine designs where installation space is limited.
12.8 Flexible Connector Orientation
The right-angle connector can be rotated through approximately 180°.
This makes cable installation easier and helps reduce unnecessary cable bending.
13. Typical Applications
13.1 Packaging Machinery
The motor can be used in packaging machines where fast indexing and precise synchronization are required.
Typical applications include:
- Filling systems
- Labeling systems
- Cartoning machines
- Bagging systems
- Sealing equipment
- Product positioning
- Film handling
- Packaging indexing mechanisms
The low-inertia design is useful for repeated start-stop motion.
13.2 Automated Assembly
Assembly equipment frequently requires accurate positioning.
The MPL-B4530F-MK74AA can be used for:
- Component positioning
- Rotary indexing
- Automated insertion
- Transfer mechanisms
- Precision assembly
- Automated fastening systems
13.3 Material Handling
The motor can be used in automated material-handling systems where accurate positioning is required.
Potential applications include:
- Conveyor positioning
- Transfer mechanisms
- Automated feeders
- Sorting equipment
- Pick-and-place mechanisms
- Position-controlled transport systems
13.4 Indexing Systems
Indexing applications are an excellent match for low-inertia servo motors.
The motor can rapidly accelerate to a commanded speed, decelerate, stop at a target position, and repeat the same cycle.
This is useful for:
- Rotary indexing tables
- Assembly stations
- Packaging stations
- Inspection stations
- Automated production cells
13.5 Vertical Machine Axes
The integrated holding brake makes this motor particularly suitable for vertical axes.
Examples include:
- Z-axis mechanisms
- Vertical slides
- Lifting platforms
- Elevating mechanisms
- Vertical transfer systems
- Gravity-loaded positioning axes
13.6 Precision Positioning
The absolute multi-turn encoder makes the motor suitable for precision positioning applications.
Examples include:
- Automated inspection
- Machine-tool auxiliary axes
- Positioning stages
- Rotary positioning
- Automated measurement systems
14. Application Advantages
| Application | Main Advantage |
|---|---|
| Packaging | Fast repetitive motion |
| Indexing | Rapid acceleration and stopping |
| Assembly | Accurate positioning |
| Material handling | Controlled movement |
| Vertical axis | Integrated holding brake |
| Inspection | Repeatable positioning |
| Rotary table | Accurate angular positioning |
| Automated feeder | High-cycle operation |
| Conveyor positioning | Closed-loop speed and position control |
| Precision machinery | High-resolution feedback |
| Robotics | Dynamic response |
| Production automation | Coordinated servo motion |
15. Mechanical Installation
The motor should be installed on a rigid mounting structure.
Correct alignment between the motor shaft and driven mechanism is important.
Excessive shaft misalignment can increase mechanical stress, bearing loading, vibration, and coupling wear.
The keyless shaft configuration requires particular attention to coupling selection.
A suitable coupling should provide secure torque transmission without damaging the motor shaft.
The coupling should also be appropriate for the machine’s:
- Maximum speed
- Continuous torque
- Peak torque
- Radial load
- Axial load
- Acceleration
- Deceleration
- Reversal frequency
The motor mounting flange should also be correctly matched to the machine’s mounting structure.
16. Environmental Considerations
The motor is intended for industrial automation applications, but the actual operating environment should always be considered during machine design.
Particular attention should be given to:
- Ambient temperature
- Humidity
- Dust
- Oil
- Coolant
- Cutting fluid
- Vibration
- Mechanical shock
- Washdown conditions
The standard configuration does not include a shaft seal.
Therefore, applications involving direct exposure to liquid or heavy contamination around the shaft should be evaluated carefully.
The motor’s actual environmental suitability depends on the complete installation configuration, including connectors, cables, shaft arrangement, mounting orientation, and surrounding machine enclosure.
17. Five Same-Series or Closely Related Models
The following models are useful alternatives or comparison points within the same MPL family.
| Model | Series | Rated Speed | Continuous Torque | Peak Torque | Power | Frame / Stack | Shaft / Feedback | Weight |
|---|---|---|---|---|---|---|---|---|
| MPL-B4530F-MK74AA | MPL Low-Inertia | 3000 rpm | 8.25 N·m | 20.3 N·m | 2.1 kW | 130 mm / 76.2 mm | Keyless / Multi-turn Absolute | 6.80 kg |
| MPL-B4530F-MK72AA | MPL Low-Inertia | 3000 rpm | 8.25 N·m | 20.3 N·m | 2.1 kW | 130 mm / 76.2 mm | Keyless / Multi-turn Absolute | Approx. 7.3 kg family class |
| MPL-B4530F-MJ74AA | MPL Low-Inertia | 3000 rpm | 8.25 N·m | 20.3 N·m | 2.1 kW | 130 mm / 76.2 mm | Keyed / Multi-turn Absolute | Approx. 6–7 kg class |
| MPL-B4530F-HK74AA | MPL Low-Inertia | 3000 rpm | Approx. 8.25 N·m | Approx. 20.3 N·m | Approx. 2.1 kW | 130 mm / 76.2 mm | Keyless / High-resolution feedback | Approx. 7.3 kg family class |
| MPL-B4540F-MK74AA | MPL Low-Inertia | 3000 rpm | 10.2 N·m | 27.1 N·m | 2.6 kW | 130 mm class / longer stack | Keyless / Multi-turn configuration | Approx. 8.6 kg |
The MPL-B4530F-MJ74AA is one of the closest mechanical alternatives because it uses the same general motor size and multi-turn feedback concept while using a keyed shaft rather than a keyless shaft.
The MPL-B4530F-MK72AA is another close comparison within the same basic configuration family.
The MPL-B4540F-MK74AA moves toward a higher-torque configuration and is worth considering when the 8.25 N·m continuous torque level is not enough.
18. Five Popular Models from the Same Brand
| Model | Series | Rated Speed | Continuous Torque | Peak Torque | Power | Frame / Size | Weight |
|---|---|---|---|---|---|---|---|
| MPL-B430P-MK74AA | MPL Low-Inertia | 5000 rpm | 6.55 N·m | 19.8 N·m | 2.2 kW | 115 mm class / 76.2 mm stack | Approx. 5.5 kg |
| MPL-B430P-MK72AA | MPL Low-Inertia | 5000 rpm | 6.55 N·m | 19.8 N·m | 2.2 kW | 115 mm class / 76.2 mm stack | Approx. 5.5 kg |
| MPL-B4530F-MJ74AA | MPL Low-Inertia | 3000 rpm | 8.25 N·m | 20.3 N·m | 2.1 kW | 130 mm / 76.2 mm | Approx. 6–7 kg class |
| MPL-B4540F-MJ74AA | MPL Low-Inertia | 3000 rpm | 10.2 N·m | 27.1 N·m | 2.6 kW | 130 mm class / longer stack | Approx. 8.6 kg |
| MPL-B4560F-MJ74AA | MPL Low-Inertia | 3000 rpm | 14.1 N·m | 34.4 N·m | 3.2 kW | Larger / longer stack | Approx. 11.82 kg |
These models represent several different servo requirements.
The MPL-B430P models are attractive when high-speed operation up to approximately 5000 rpm is important.
The MPL-B4530F family provides a balanced combination of torque and 3000 rpm operation.
The MPL-B4540F provides additional torque for heavier loads.
The MPL-B4560F is intended for applications requiring substantially higher torque and power.
19. Comparison with the Keyed MPL-B4530F-MJ74AA
The MPL-B4530F-MK74AA and MPL-B4530F-MJ74AA are very closely related.
Their most noticeable mechanical difference is the shaft configuration.
| Parameter | MPL-B4530F-MK74AA | MPL-B4530F-MJ74AA |
|---|---|---|
| Series | MPL | MPL |
| Frame | 130 mm | 130 mm |
| Stack | 76.2 mm | 76.2 mm |
| Rated Speed | 3000 rpm | 3000 rpm |
| Continuous Torque | 8.25 N·m | 8.25 N·m |
| Peak Torque | 20.3 N·m | 20.3 N·m |
| Rated Power | Approx. 2.1 kW | Approx. 2.1 kW |
| Feedback | Multi-turn absolute | Multi-turn absolute |
| Encoder | 1024 Sin/Cos | 1024 Sin/Cos |
| Brake | 24 V DC | 24 V DC |
| Shaft | Keyless | Keyed |
| Connector | Right-angle DIN | Right-angle DIN |
| Connector Rotation | 180° | 180° |
| Weight | Approx. 6.80 kg | Approx. 6–7 kg class |
| Best Mechanical Match | Clamping/keyless coupling | Keyed coupling |
The choice between these two models should normally be based on the mechanical transmission arrangement.
If the machine is designed around a keyed coupling, the keyed version is generally the more natural choice.
If the machine uses a compatible keyless coupling or clamping arrangement, the MK configuration may be preferable.
20. Comparison with MPL-B430P Models
| Parameter | MPL-B4530F-MK74AA | MPL-B430P-MK74AA |
|---|---|---|
| Series | MPL | MPL |
| Rated Speed | 3000 rpm | 5000 rpm |
| Continuous Torque | 8.25 N·m | 6.55 N·m |
| Peak Torque | 20.3 N·m | 19.8 N·m |
| Rated Power | Approx. 2.1 kW | Approx. 2.2 kW |
| Frame Class | 130 mm | 115 mm |
| Magnet Stack | 76.2 mm | 76.2 mm |
| Feedback | Multi-turn absolute | Multi-turn configuration |
| Shaft | Keyless | Keyless |
| Brake | 24 V DC | 24 V DC configuration |
| Main Advantage | Higher continuous torque | Higher speed |
| Typical Application | General dynamic servo axis | High-speed motion |
The MPL-B430P is a better fit when the application requires higher motor speed.
The MPL-B4530F-MK74AA is a better fit when the machine requires more continuous torque and a 3000 rpm operating class.
21. Comparison with MPL-B4540F
| Parameter | MPL-B4530F-MK74AA | MPL-B4540F-MK74AA |
|---|---|---|
| Rated Speed | 3000 rpm | 3000 rpm |
| Continuous Torque | 8.25 N·m | 10.2 N·m |
| Peak Torque | 20.3 N·m | 27.1 N·m |
| Rated Power | Approx. 2.1 kW | 2.6 kW |
| Frame Class | 130 mm | 130 mm class |
| Magnet Stack | 76.2 mm | Longer stack |
| Feedback | Multi-turn absolute | Multi-turn configuration |
| Shaft | Keyless | Keyless |
| Brake | 24 V DC | 24 V DC configuration |
| Approx. Weight | 6.80 kg | Approx. 8.6 kg |
| Main Advantage | Lower motor mass and compact torque package | Higher torque and power |
The MPL-B4540F is worth considering when the machine needs additional continuous and peak torque.
The MPL-B4530F-MK74AA is more appropriate when the existing machine design is optimized around the smaller 76.2 mm stack and its torque requirements are already satisfied.
22. Main Benefits of the Keyless Shaft
The keyless shaft is an important feature of the MPL-B4530F-MK74AA.
A keyless connection can provide several mechanical advantages when used with the correct coupling.
Smooth Shaft Surface
Without a keyway, the shaft has a continuous cylindrical surface.
Flexible Coupling Options
Compatible clamping couplings can provide a secure connection without a traditional key.
Reduced Assembly Complexity
Depending on the coupling design, installation can be straightforward and repeatable.
Precision Transmission
A properly selected clamping coupling can provide accurate torque transmission for servo applications.
Reduced Mechanical Play
The correct keyless coupling can provide a rigid connection with very little backlash.
The exact benefit depends heavily on the coupling and machine design.
23. Why Absolute Multi-Turn Feedback Matters
Absolute multi-turn feedback is particularly useful when machine position matters across multiple motor revolutions.
For example, a rotary axis may need to distinguish not only the angular position within one revolution but also the accumulated position across several revolutions.
This is useful for:
- Screw-driven axes
- Rotary positioning
- Conveyor positioning
- Automated indexing
- Vertical positioning
- Packaging equipment
- Assembly machinery
- Machine tools
- Material handling
It can also reduce the dependence on repeated mechanical homing procedures, depending on the overall controller and drive configuration.
24. Advantages for High-Cycle Machines
The MPL-B4530F-MK74AA is particularly well suited to machines that repeat the same motion many times.
A typical cycle might involve:
- Rapid acceleration.
- Movement toward the target position.
- Controlled deceleration.
- Position settling.
- Holding.
- Reversal or return movement.
- Repeating the cycle.
The low-inertia motor design is valuable in this type of operation because the rotor does not require as much energy to change speed compared with a higher-inertia motor.
This can help reduce cycle time and improve overall machine productivity.
25. Typical Machine Categories
The MPL-B4530F-MK74AA can be considered for:
- Packaging machines
- Cartoning equipment
- Filling machines
- Labeling machines
- Automated assembly systems
- Rotary indexing tables
- Precision positioning equipment
- Material-handling systems
- Automated feeders
- Conveyor positioning systems
- Inspection machines
- Machine-tool auxiliary axes
- Pick-and-place systems
- Vertical positioning systems
- Automated production lines
- Robotic mechanisms
- Servo-controlled transfer systems
- General industrial automation equipment
26. Product Selection Checklist
Before using the MPL-B4530F-MK74AA as a replacement or new installation, verify the following parameters.
| Selection Item | Required Check |
|---|---|
| Motor Model | Confirm exact MPL-B4530F-MK74AA configuration |
| Voltage | Confirm 460 V AC class compatibility |
| Speed | Confirm 3000 rpm requirement |
| Continuous Torque | Confirm 8.25 N·m is sufficient |
| Peak Torque | Confirm approximately 20.3 N·m requirement |
| Power | Confirm approximately 2.1 kW |
| Feedback | Confirm multi-turn absolute encoder compatibility |
| Encoder | Confirm 1024 Sin/Cos / Hiperface compatibility |
| Shaft | Confirm keyless shaft requirement |
| Coupling | Confirm compatible clamping/keyless coupling |
| Brake | Confirm 24 V DC brake requirements |
| Flange | Confirm 130 mm mounting arrangement |
| Connector | Confirm SpeedTEC DIN cable compatibility |
| Cable Routing | Confirm right-angle connector clearance |
| Environment | Check temperature, dust, oil, coolant, and moisture |
| Shaft Area | Confirm whether additional sealing is required |
| Motor Weight | Allow for approximately 6.80 kg |
| Mechanical Load | Check radial and axial shaft loads |
| Servo Drive | Confirm drive compatibility |
| Motion Profile | Check acceleration, deceleration, and cycle time |
27. Product Advantages at a Glance
| Advantage | Description |
|---|---|
| Low inertia | Fast dynamic response |
| 3000 rpm rating | Balanced speed and torque |
| 8.25 N·m continuous torque | Strong continuous torque capability |
| 20.3 N·m peak torque | Useful acceleration reserve |
| Absolute multi-turn encoder | Reliable position feedback |
| 1024 Sin/Cos | High-resolution feedback |
| Hiperface interface | Servo feedback communication |
| Keyless shaft | Compatible with clamping-style couplings |
| 24 V DC brake | Useful for holding applications |
| 130 mm frame | Compact industrial package |
| 76.2 mm stack | Balanced torque output |
| Rotatable connector | Flexible cable routing |
| IEC metric mounting | Convenient machine integration |
| Brushless construction | Suitable for servo operation |
| High-cycle capability | Good fit for repetitive automation |
28. Technical Summary
| Category | Specification |
|---|---|
| Model | MPL-B4530F-MK74AA |
| Brand | Allen-Bradley |
| Product Family | MP-Series |
| Motor Series | MPL Low-Inertia Brushless Servo |
| Motor Type | Rotary AC servo motor |
| Voltage Class | 400 V AC class |
| Armature Voltage | 460 V AC |
| Rated Speed | 3000 rpm |
| Continuous Stall Torque | 8.25 N·m |
| Peak Stall Torque | 20.3 N·m |
| Rated Motor Output | Approx. 2.1 kW |
| Frame Size | 45 |
| Frame Dimension | 130 mm / 5.12 in. |
| Magnet Stack Length | 76.2 mm / 3.0 in. |
| Feedback | Absolute multi-turn |
| Encoder | High-resolution Sin/Cos |
| Encoder Resolution | 1024 cycles/revolution |
| Protocol | Hiperface |
| Shaft | Keyless |
| Shaft Key | None |
| Shaft Seal | None |
| Brake | 24 V DC holding brake |
| Connector | SpeedTEC DIN |
| Connector Style | Right-angle |
| Connector Rotation | 180° |
| Mounting | IEC metric flange |
| Mounting Hole Type | Free mounting holes / FF |
| Rotor Inertia | Approx. 0.00040 kg·m² |
| Approximate Weight | 6.80 kg |
| Typical Application | Industrial motion control |
| Main Strength | Dynamic response, absolute feedback, keyless mechanical connection |
29. Final Product Description
The Allen-Bradley MPL-B4530F-MK74AA is a high-performance, low-inertia brushless AC servo motor designed for precision industrial motion control.
With a 130 mm frame, 76.2 mm magnet stack, 3000 rpm rated speed, 8.25 N·m continuous stall torque, and approximately 20.3 N·m peak stall torque, the motor provides a useful balance between speed, torque, and dynamic response.
Its multi-turn high-resolution absolute encoder provides accurate position feedback for closed-loop servo control.
The 1024 Sin/Cos encoder and Hiperface-type feedback arrangement make the motor suitable for applications where position accuracy and repeatability are important.
The keyless shaft is one of the defining characteristics of this particular configuration. It makes the motor a good candidate for machinery designed around compatible clamping or keyless couplings.
The integrated 24 V DC holding brake further expands the range of applications, particularly for vertical axes, lifting mechanisms, and gravity-loaded positioning systems.
The right-angle SpeedTEC DIN connector with approximately 180° rotation provides additional flexibility during machine installation and cable routing.
Overall, the MPL-B4530F-MK74AA is well suited to packaging machinery, automated assembly equipment, indexing systems, material-handling equipment, precision positioning systems, machine-tool auxiliary axes, vertical positioning mechanisms, and other industrial automation applications.
Its main strengths can be summarized as low inertia, strong torque capability, 3000 rpm operation, high-resolution absolute multi-turn feedback, keyless shaft construction, integrated holding brake, compact 130 mm frame design, and flexible connector orientation.
For a machine that already uses a keyless coupling system, this motor can be a particularly practical choice because its mechanical shaft configuration matches that type of transmission arrangement without requiring a traditional shaft key.