Description
Product Overview
The Allen-Bradley MPL-B580F-MJ72AA is an MP-Series MPL low-inertia brushless AC servo motor intended for coordinated motion applications requiring controlled speed, torque, and position. Rockwell Automation specifies this exact catalog number as a 460 V AC rotary servo motor, with a 165 mm frame size, 203.2 mm magnet stack length, 3000 RPM rated speed, multi-turn high-resolution absolute feedback, keyed shaft extension, and no holding brake. The motor uses a right-angle SpeedTEC DIN connector that can rotate through 180 degrees, which can be useful when cabinet and machine-space constraints dictate cable orientation.
For Allen-Bradley MPL-B580F-MJ72AA, the important selection values are not just voltage and speed. The motor provides 34 Nm continuous stall torque and 87 Nm peak torque, with approximately 7.1 kW continuous rated output and 0.00289 kg·m² rotor inertia. Its feedback system uses a multi-turn absolute encoder with 1024 sin/cos cycles per revolution and Hiperface protocol. The documented compatible drive family includes Kinetix 5500, 6200/6500, 6000, 300, 350, 2000, 7000, and Ultra 3000 platforms, although exact drive compatibility should be checked against the installed drive revision and motor configuration.
The Allen-Bradley MPL-B580F-MJ72AA uses IEC metric flange mounting and a keyed shaft without a factory-installed holding brake. Rockwell’s current product page identifies the catalog number as an active MP-Series MPL product. For a replacement, the motor’s complete catalog number matters because encoder type, brake option, shaft configuration, connector arrangement, and voltage class can differ between visually similar MPL motors.
Product Introduction
A servo motor replacement is not simply a matter of matching frame dimensions. MPL-B580F-MJ72AA combines a 460 VAC motor rating, 3000 RPM speed, 34 Nm continuous torque, and multi-turn absolute feedback in a frame-5 MPL package.
For a Kinetix servo motor replacement, verify the drive’s motor database/configuration, feedback compatibility, cable selection, and mechanical load before commissioning. The motor has no factory brake, so gravity-loaded vertical axes require a separate holding strategy.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Catalog Number | MPL-B580F-MJ72AA |
| Product Series | MP-Series MPL |
| Product Type | Low-Inertia Brushless AC Servo Motor |
| Motor Voltage | 460 VAC |
| Voltage Class | 400 V AC |
| Rated Speed | 3000 RPM |
| Maximum Speed | 3000 RPM |
| Continuous Stall Torque | 34 Nm |
| Peak Torque | 87 Nm |
| Continuous Rated Power | 7.1 kW |
| Rotor Inertia | 0.00289 kg·m² |
| Frame Size | 165 mm / Frame 5 |
| Magnet Stack | 203.2 mm / 8 in. |
| Feedback | Multi-turn high-resolution absolute encoder |
| Feedback Resolution | 1024 sin/cos cycles/rev |
| Feedback Protocol | Hiperface |
| Shaft | Keyed shaft extension |
| Brake | No brake |
| Connector | SpeedTEC DIN, right-angle |
| Connector Rotation | 180° |
| Mounting | IEC metric flange, Type FF |
| Shaft Seal | Not included |
| Rated Operating Temperature | 0–40°C |
| Environmental Protection | IP50 standard; higher protection possible with specified sealing components |
| Compatible Drive Families | Kinetix 5500, 6200/6500, 6000, 300, 350, 2000, 7000; Ultra 3000 |
Rockwell’s current catalog identifies the motor as a 460 V, 3000 RPM MPL servo motor, while the detailed product data specifies 34 Nm continuous torque, 87 Nm peak torque, 7.1 kW continuous power, absolute multi-turn feedback, and Hiperface protocol.
Related Products
- MPL-B580F-MJ72AH — Same MPL frame-5/stack-80 family, but with a different suffix and feedback configuration. It should not be treated as an automatic replacement for the MJ72AA.
- MPL-B330P-MJ72AH — Smaller MPL motor configuration with different frame and performance characteristics. Useful where machine torque and inertia requirements are lower.
- MPL-B4540F-SJ72AH — Another 460 V MPL motor with a smaller frame/stack configuration and different encoder/shaft arrangement. It is an alternative motor family member, not a direct mechanical substitute.
- Kinetix 5500 — Compatible servo-drive family documented for the MPL-B580F-MJ72AA. The exact drive and firmware configuration must still be checked.
- Kinetix 6200/6500 — Modular servo-drive family listed among the compatible drive series for this motor.
- Kinetix 6000 — Earlier modular drive family compatible with the motor according to the published motor data.
- Kinetix 7000 — High-power servo-drive family listed as compatible with this MPL motor.
- MPL-SSN-A5B5 — MPL shaft-seal accessory. It is relevant when the application requires additional shaft-end environmental protection.
MPL-B580F-MJ72AA
Frequently Asked Questions
What is the Allen-Bradley used for?
The is a low-inertia rotary servo motor for closed-loop motion control.
It is suited to machine axes where the drive must control:
- Position
- Velocity
- Acceleration/deceleration
- Torque
- Synchronized motion
The MPL platform is commonly applied to machinery such as packaging, converting, material handling, and other coordinated motion equipment.
Is a 460 V or 480 V motor?
Rockwell’s current catalog describes it as a 460 V AC motor, while it belongs to the 400/480 V-class MPL motor range.
For procurement, use the complete catalog number rather than interpreting “480 V” from a generic MP-Series description. The exact motor-drive combination should be configured according to the manufacturer’s motor data.
What is the torque rating of ?
The published motor data specifies:
- Continuous stall torque: 34 Nm
- Peak torque: 87 Nm
- Continuous rated power: 7.1 kW
- Rated speed: 3000 RPM
Do not size the motor from continuous torque alone. Acceleration torque, load inertia, duty cycle, peak duration, and regenerative energy all matter when selecting the servo drive.
Does have a holding brake?
No.
The exact configuration is specified as no brake.
This matters on vertical or gravity-loaded axes. A servo drive’s position control should not be treated as a mechanical holding brake. If the axis can fall when power is removed, an appropriately engineered external holding mechanism is required.
Can I use with a Kinetix 5500?
The published Rockwell motor data lists Kinetix 5500 among the compatible drive families.
Before commissioning, verify:
- Drive catalog number.
- Drive firmware.
- Motor catalog entry.
- Feedback configuration.
- Motor cable.
- Load inertia.
- Peak torque requirement.
- Safe torque-off and machine safety configuration.
The word “compatible” should not be interpreted as proof that every Kinetix 5500 revision can be paired without configuration work.
Does the motor use absolute feedback?
Yes.
The uses a multi-turn high-resolution absolute encoder, with published data specifying 1024 sin/cos cycles per revolution and Hiperface protocol.
That feedback arrangement is a critical part of the motor’s identity. Replacing it with a visually similar MPL motor using another encoder type can create drive configuration and commissioning problems.
How should I test a New Surplus ?
For a surplus servo motor, electrical and mechanical testing should both be performed.
Recommended inspection and test sequence:
- Verify the complete nameplate.
- Confirm voltage, speed, encoder, and brake configuration.
- Inspect the keyed shaft and mounting flange.
- Check bearings for abnormal mechanical play or noise.
- Inspect the SpeedTEC DIN connector.
- Measure winding resistance and compare phase-to-phase values.
- Perform insulation-resistance testing using an appropriate procedure.
- Connect to a compatible servo drive/test system.
- Verify encoder identification and feedback.
- Run the motor at controlled low speed.
- Check vibration, current balance, and abnormal temperature rise.
- Record test results before shipment or installation.
For this motor, nameplate verification is particularly important because the MPL family contains visually similar motors with different feedback, shaft, brake, voltage, and connector configurations. Rockwell currently lists the exact as an active product.
