Allen-Bradley MPL-B320P-SJ72AA Low-Inertia AC Servo Motor
The Allen-Bradley MPL-B320P-SJ72AA is a low-inertia brushless AC servo motor from Rockwell Automation's MPL series, engineered for seamless integration with the Kinetix servo drive platform. Operating on 460V AC, this motor delivers exceptional performance for applications requiring fast acceleration, precise positioning, and reliable operation across extended production cycles.
Key Specifications
| Parameter |
Value |
| Model Number |
MPL-B320P-SJ72AA |
| Motor Type |
Brushless AC Servo |
| Series |
Allen-Bradley MPL |
| Supply Voltage |
460V AC |
| Inertia Class |
Low |
| Feedback Type |
Multi-Turn Absolute Encoder |
| Connector Style |
Rotary (SpeedTec) |
| Drive Compatibility |
Kinetix Series |
| Cooling Method |
Self-Cooled (Natural Convection) |
| Mount Type |
Flange Mount |
Engineering Features
- Low-inertia rotor design enables rapid dynamic response for faster acceleration and deceleration cycles
- Multi-turn absolute encoder eliminates homing requirements after power cycles or emergency stops
- 460V operation aligns with standard industrial three-phase power systems
- SpeedTec rotary connector system provides quick, secure cable connections with quarter-turn locking
- Native Kinetix ecosystem integration with automatic motor parameter recognition in Studio 5000
Typical Applications
- Cartesian robot and gantry axis drives
- Rotary indexing and dial table positioning
- High-cycle pick-and-place automation
- Packaging machine cross-seal and film-feed axes
- Assembly station servo-press and torque-control applications
- Conveyor registration and cut-to-length systems
- Semiconductor handling and precision stage drives
- Multi-axis winding and coil-forming equipment
Drive Compatibility
The MPL-B320P-SJ72AA integrates directly with Rockwell Automation's Kinetix servo drive family including Kinetix 5500, 6000, 6500, and 300 series. Cable compatibility requires matching the SJ72AA connector specification with appropriate SpeedTec power and feedback cables.
Frequently Asked Questions
What servo drives are compatible with the MPL-B320P-SJ72AA?
This motor is compatible with Allen-Bradley Kinetix series servo drives, including the Kinetix 5500, 6000, and 6500. Compatibility depends on the drive's power rating and encoder interface support. Verify against Rockwell Automation's product compatibility tools before ordering.
Does the MPL-B320P-SJ72AA support absolute positioning without a home routine?
Yes. The multi-turn absolute encoder retains axis position data across power cycles. After a controlled shutdown or e-stop, the drive recovers the last known position on powerup, eliminating the need for homing sequences on each restart.
What does low inertia mean in practical terms for machine performance?
A low-inertia rotor accelerates and decelerates faster for a given drive output. This reduces move time on high-cycle axes and allows the use of smaller drive hardware without sacrificing responsiveness, directly improving machine throughput on indexing and pick-and-place applications.
Is exact part number matching required when replacing this motor?
Yes. The suffix codes define the encoder type, connector style, and voltage rating. Substituting a different suffix variant may result in cable incompatibility, encoder protocol mismatch, or incorrect drive parameter loading. Always replace with the exact part number unless Rockwell Automation has confirmed a validated substitute.
What software is used to configure this motor with a Kinetix drive?
Configuration is handled through Rockwell Automation's Studio 5000 Logix Designer software. The motor is added as a motion axis within the project, and the drive auto-populates motor parameters from the encoder ID data. Rockwell's Motion Analyzer tool is available for axis sizing and torque-speed verification during design.
Your message must be between 20-3,000 characters!
English
