Description
Allen‑Bradley MPL-B420P-MK22AA – MP-Series Low-Inertia Servo Motor for Fast, Precise Motion
The Allen‑Bradley MPL-B420P-MK22AA is part of the MP-Series Low Inertia (MPL) brushless servo family, built for rapid acceleration, tight speed control, and clean integration with Kinetix and Ultra series drives. It’s a solid pick for applications where cycle time and repeatability matter—think pick-and-place gantries, horizontal form-fill-seal, labeling, indexing tables, and light-duty rotary axes. One thing I appreciate is how the low rotor inertia makes tuning with Rockwell drives straightforward; in many cases you’ll be up and running with only minor gains adjustments.
Company’s Order Placement Process and Guarantees
- Warranty period: 365 days
- Delivery time: 1 week for in-stock; no more than one month at the latest
- Payment terms: 50% advance payment, full payment before delivery
- Express delivery: FedEx, UPS, DHL
Key Features
- Low-inertia rotor design – enables quick starts/stops and high bandwidth control, ideal for short indexing moves.
- “P” winding for high-speed operation – typically chosen for 400/480 V-class drive systems where top-end speed is critical.
- Smart Feedback Device (SFD) compatibility – supports quick auto-tuning and precise commutation with Allen‑Bradley Kinetix/Ultra drives.
- Compact 100 mm-class square flange – easy drop-in on many OEM machine frames with standard IEC-style mounting.
- Industrial protection – IP54 as commonly supplied; with a shaft seal option, many installations achieve IP65 at the shaft in most cases.
- Smooth low-speed performance – suited to web handling or tension control where cogging must be minimal.
- Thermal sensing – integrated thermal protection helps the drive manage overload and extend service life.
Technical Specifications
| Brand / Model | Allen‑Bradley MPL-B420P-MK22AA (MP‑Series Low Inertia AC Servo Motor) |
| HS Code | 8501.52 (AC multi‑phase motors > 750 W and ≤ 75 kW) |
| Power Requirements | Drive-supplied 3‑phase output (typically 400/480 V‑class bus). Connect to compatible Kinetix/Ultra servo drives; no direct mains connection to the motor. |
| Rated Speed Class | High-speed “P” winding; many MPL-B420P motors run up to approximately 5000 rpm, depending on drive settings and load. |
| Feedback / Sensing | Smart Feedback Device (SFD) digital encoder interface; integrated thermal sensor to the drive. |
| Signal I/O Types | 3‑phase power (U/V/W) + PE; feedback via SFD connector; thermal sensor leads; some builds support a 24 VDC holding brake (verify option). |
| Communication Interfaces | Motor feedback to drive via SFD (no network interface in the motor itself). |
| Dimensions & Weight | 100 mm‑class square flange; overall length varies with stack/options. Typical mass for this frame is in the mid‑range for MP‑Series; confirm with the latest Rockwell drawing for your exact suffix. |
| Operating Temperature | 0…40 °C ambient (non‑derated). Operation up to 55 °C is common with derating and proper cooling, per MP‑Series guidance. |
| Protection / Insulation | IP54 housing typical; IP65 at the shaft with seal option. Insulation Class F. |
| Installation Method | Flange mount (IEC-style square flange) with keyed shaft; compatible with standard couplings and gearheads. |
Related or Supporting Products
- MPL-B330P-MJ72AA – Smaller frame/torque; good when footprint is tight and inertia must stay low.
- MPL-B430P-MK72AA – Larger torque in the same family; helpful for heavier tables or belt axes.
- MPL-B420T-xxxxxx – “T” winding variant typically suited for 230 V‑class systems rather than 400/480 V‑class.
- 2094 Kinetix 6000 servo drives – Native pairing with MPL motors and SFD feedback.
- 2098 Ultra3000 servo drives – Widely used with MPL motors for standalone axes.
- 2090 series motor cables – Power and feedback cables for MPL motors (e.g., 2090‑CP for power; 2090‑UXNFB for SFD feedback). Lengths and connector angles vary by machine layout.
From my experience on packaging retrofits, the MPL-B420P-MK22AA hits a sweet spot: fast enough for aggressive profiles, yet easy to keep quiet and smooth under light tension. One customer noted they shaved a few hundred milliseconds off each cycle on a two‑axis pick head simply by moving from a medium‑inertia motor to this low‑inertia MPL, with no hardware changes beyond the motor and a cable set.
Installation & Maintenance
- Cabinet/drive environment – Keep the drive in a ventilated cabinet; observe EMC grounding practices and shield terminations on motor/feedback cables.
- Wiring – Use Allen‑Bradley 2090 series power and feedback cables; route power and feedback separately to minimize noise. Ensure protective earth continuity to the motor frame.
- Mounting – Rigid, flat flange mounting with proper shaft alignment. Use a compliant coupling only if needed to protect bearings; avoid side loads beyond the catalog limits.
- Ventilation – Provide airflow around the motor body. In tight machines, a small ducted airflow over the housing typically helps maintain torque at higher ambient temperatures.
- Safety – Lock out power before servicing. Verify discharge of drive bus and brake supply (if fitted) prior to connector removal.
- Routine care – Periodically check mounting bolts, coupling set screws, and cable strain relief. Clean dust buildup on the housing fins. Keep firmware on the drive current for the latest motor database entries.
- Alignment & tuning – Start with the drive’s auto‑tune for SFD feedback; refine gains on the critical axis segments. You might notice a smoother profile when jerk limits are set conservatively during commissioning.
Quality & Certifications
- Certifications: CE, UL/cUL Recognized, RoHS compliant (typical for MP‑Series motors).
- Manufacturing quality: Produced under ISO 9001 quality systems by Rockwell Automation.
- Warranty: 365 days against defects in materials and workmanship.
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