Allen-Bradley MPL-B310P-MJ72AA — Rotary Servo Motor | Kinetix Low-Inertia Series
Engineering Background
The Allen-Bradley MPL-B310P-MJ72AA is a precision rotary servo motor engineered by Rockwell Automation as part of the Kinetix® Motion Control ecosystem. Designed for demanding industrial automation environments, this motor delivers high dynamic response, compact form factor, and seamless integration with Allen-Bradley Kinetix servo drives. It is the preferred choice for procurement engineers specifying motion axes in packaging, material handling, semiconductor, and precision assembly applications.
Product Positioning
The MPL-B310P-MJ72AA occupies the low-inertia, medium-torque segment of the Kinetix servo motor lineup. Its stainless-shaft, food-grade-compatible construction and IP65-rated sealing make it suitable for both standard industrial and washdown-adjacent environments. Procurement teams sourcing replacement or expansion axes for existing Kinetix 5500, 5700, or 6500 drive systems will find this motor a direct, specification-matched solution.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Part Number | MPL-B310P-MJ72AA |
| Series | Kinetix MPL (Low-Inertia) |
| Frame Size | B (63 mm) |
| Continuous Stall Torque | 1.0 N·m (8.85 lb·in) |
| Peak Torque | 3.0 N·m (26.6 lb·in) |
| Rated Speed | 3,000 RPM |
| Maximum Speed | 7,200 RPM |
| Continuous Stall Current | ~1.5 A (drive-dependent) |
| Feedback Device | Multi-turn absolute encoder (high-resolution) |
| Brake | No brake (P = no brake option) |
| Shaft Type | Stainless steel, smooth (no keyway) |
| Connector Style | M (SpeedTec DIN, 90° power & feedback) |
| Insulation Class | Class F (155°C) |
| Ingress Protection | IP65 (shaft seal standard) |
| Ambient Temperature | 0°C to +40°C (operating) |
| Weight | ~5.5 kg (5,500 g) |
| Compatible Drives | Kinetix 5500, 5700, 6500 series |
| Mounting Standard | IEC 72-1 / NEMA |
| Certification | UL, CE, cUL |
Proven Application Environments
- Packaging Machinery: High-cycle pick-and-place, form-fill-seal, and cartoning lines requiring precise velocity and position control.
- Material Handling: Conveyor indexing, robotic arm joints, and gantry axes where low inertia enables rapid acceleration profiles.
- Semiconductor & Electronics Assembly: Sub-millimeter positioning on PCB handling, wafer transport, and dispensing systems.
- Printing & Converting: Web tension control and registration axes demanding tight speed regulation.
- Food & Beverage: IP65 sealing and stainless shaft support washdown-compatible installations.
- Machine Tool Auxiliary Axes: Tool changers, rotary tables, and feed axes on CNC machining centers.
Engineering Advantages
- Low-Inertia Rotor: Minimizes reflected inertia mismatch, enabling aggressive acceleration/deceleration without drive oversizing.
- SpeedTec DIN Connectors: Quarter-turn locking mechanism reduces installation time and eliminates connector vibration loosening in high-cycle applications.
- Multi-Turn Absolute Encoder: Retains position reference through power cycles — eliminates homing routines and reduces machine restart time.
- Integrated Thermal Protection: PTC thermistor embedded in windings provides real-time thermal monitoring via Kinetix drive feedback loop.
- Seamless Studio 5000 Integration: Motor parameters auto-populate in Logix Designer via Rockwell’s Motion Database — zero manual tuning entry required.
- IP65 Shaft Seal: Standard on all MPL-B series — no optional upgrade required for dust and low-pressure water ingress protection.
System Architecture & Signal Flow
The MPL-B310P-MJ72AA operates within a closed-loop servo architecture:
- Controller Layer: Allen-Bradley ControlLogix or CompactLogix PLC executes motion instructions via EtherNet/IP (CIP Motion).
- Drive Layer: Kinetix 5500/5700 servo drive receives velocity/torque commands and closes the current loop at high bandwidth.
- Motor Layer: MPL-B310P-MJ72AA converts electrical power to mechanical torque; absolute encoder feeds position data back to the drive at high resolution.
- Feedback Path: SpeedTec feedback cable carries encoder signals (SIN/COS + absolute data) from motor to drive — single-cable power+feedback option available with Kinetix 5700.
This architecture supports coordinated multi-axis motion, electronic gearing, and cam profiles natively within Studio 5000 Logix Designer.
Sourcing & Quality Verification
- Origin Traceability: Each unit sourced with verifiable lot documentation; date codes inspected against Rockwell Automation production records.
- Counterfeit Screening: Physical inspection of nameplate, connector molding, shaft finish, and encoder housing against OEM reference samples.
- Functional Pre-Check: Winding resistance, insulation resistance (IR test), and encoder signal integrity verified prior to shipment.
- Packaging Integrity: Original OEM packaging preserved where available; anti-static and moisture-barrier packaging applied for all units.
- Warranty: 12-month operational warranty from Konmask.com; RMA process supported for verified defects.
Procurement Process
- Inquiry: Submit part number, required quantity, and delivery timeline via email or WhatsApp.
- Quotation: Formal quotation with unit price, lead time, and shipping options issued within 24 business hours.
- Order Confirmation: Purchase order or proforma invoice accepted; T/T, L/C, and trade assurance payment terms available.
- Quality Inspection: Pre-shipment inspection report and photos provided upon request.
- Shipping: DHL / FedEx / sea freight options; export documentation (commercial invoice, packing list, CO) included.
- After-Sales: Technical support for installation, drive parameter configuration, and commissioning available post-delivery.
Technical FAQ
- Q: Is the MPL-B310P-MJ72AA compatible with Kinetix 5500 drives?
- A: Yes. The MPL-B series is natively supported by Kinetix 5500, 5700, and 6500 drives. Motor parameters are pre-loaded in the Rockwell Motion Database within Studio 5000.
- Q: Does this motor include a holding brake?
- A: No. The “P” in the part number designates no brake. If a brake is required, the equivalent model with brake is MPL-B310P-MJ72AA with a different brake suffix — contact us to confirm the correct part number for your application.
- Q: What feedback cable is required?
- A: Rockwell 2090-CFBM7DF-CDAFxx series SpeedTec feedback cables are recommended. Cable length (xx) must be specified at order. Single-cable (power+feedback) is supported with Kinetix 5700 iTrak configurations.
- Q: Can this motor be used with third-party servo drives?
- A: Technically possible with SIN/COS encoder interface drives, but Rockwell Automation does not support this configuration. Full performance and safety functions are only guaranteed within the Kinetix ecosystem.
- Q: What is the lead time for this part?
- A: In-stock units ship within 3–5 business days. For larger quantities or specific date-code requirements, contact our procurement team for availability confirmation.
- Q: Is a Certificate of Conformance (CoC) available?
- A: Yes. CoC and inspection reports are available upon request for all units. Please specify this requirement at the time of order.
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