Allen-Bradley MPL Series Servo Motors

Technical Dossier

Product Details And Specifications

Allen-Bradley MPL Series: Comprehensive Module Range and Technical Overview

The Allen-Bradley MPL (Magnetically Permeable Low-inertia) Series servo motors, manufactured by Rockwell Automation, represent one of the most widely deployed rotary servo motor families in global heavy industry. Installed across petrochemical refineries, nuclear power generation facilities, offshore oil platforms, pulp and paper mills, and large-scale chemical processing plants, the MPL Series is the standard motion component paired with Rockwell's Kinetix servo drive ecosystem — including the Kinetix 2000, Kinetix 6000, Kinetix 6200, Kinetix 6500, and Kinetix 5700 drive families. The series covers a continuous stall torque range from approximately 0.48 N·m to over 220 N·m, with frame sizes from A (small) through F (large), making it applicable from precision positioning axes to heavy-load gantry and extruder applications. The MPL Series is engineered for direct integration with Logix-based control architectures via the SERCOS and EtherNet/IP motion interfaces, enabling deterministic real-time motion control within a unified PlantPAx or FactoryTalk environment.

The Evolution of MPL Series Architecture

The MPL Series was introduced by Rockwell Automation in the early 2000s as a successor to earlier servo motor families including the F-Series and H-Series, which relied on resolver-based feedback and analog drive interfaces. The MPL platform standardized on a high-resolution encoder feedback architecture, initially shipping with incremental encoders and later transitioning to multi-turn absolute encoders (Hiperface and EnDat-compatible variants) to support safe-torque-off (STO) and functional safety requirements under IEC 62061 and ISO 13849.

Early MPL variants (suffix codes MK, ME) used standard keyed shaft configurations and IP54-rated enclosures. Subsequent revisions introduced stainless-shaft options, food-grade washdown variants (suffix WD), and brake-equipped configurations (suffix B in the model string) for vertical axis hold applications. The introduction of the Kinetix 5700 drive family in the 2010s brought iTRAK and MagnaView compatibility, and the MPL Series was updated with compatible feedback modules to support these architectures. As of 2026, the MPL Series is in a mature lifecycle phase; Rockwell Automation continues to manufacture active variants, but a significant portion of the catalog — particularly older MK22, MK24, and ME23 feedback suffix models — has transitioned to limited availability or end-of-life status, making third-party sourcing and lifecycle extension support critical for installed base maintenance.

MPL Series Full Catalog & Functionalities (SKU List)

The following represents a structured reference index of commonly specified MPL Series servo motor models, organized by frame size and torque class. All models are rotary AC servo motors designed for use with Rockwell Kinetix servo drives.

Frame Size A — Low Torque (Continuous Stall Torque: 0.48–1.5 N·m)

• MPL-A1510F-HJ72AA: Frame A, 0.48 N·m continuous stall, 230V, multi-turn absolute encoder, no brake, standard shaft.
• MPL-A1510V-HJ72AA: Frame A, 0.48 N·m continuous stall, 460V, multi-turn absolute encoder, no brake, standard shaft.
• MPL-A1510F-MK22AA: Frame A, 0.48 N·m, 230V, incremental encoder (2048 ppr), legacy feedback suffix, limited availability.
• MPL-A1510V-MK22AA: Frame A, 0.48 N·m, 460V, incremental encoder, legacy variant, commonly found in pre-2010 Kinetix 6000 installations.

Frame Size B — Medium-Low Torque (Continuous Stall Torque: 1.5–7.5 N·m)

• MPL-B1530F-MK22AA: Frame B, 1.5 N·m continuous stall, 230V, incremental encoder, no brake, standard keyed shaft.
• MPL-B1530V-MK22AA: Frame B, 1.5 N·m, 460V, incremental encoder, standard shaft, Kinetix 6000/6200 compatible.
• MPL-B220P-MK22AA: Frame B, 2.2 N·m continuous stall, 460V, incremental encoder, no brake.
• MPL-B320P-MK24AA: Frame B, 3.2 N·m continuous stall, 460V, high-resolution incremental encoder (4096 ppr), no brake, standard shaft — the subject SKU of this listing.
• MPL-B320P-HK72AA: Frame B, 3.2 N·m, 460V, multi-turn absolute encoder, no brake, current production replacement for MK24AA feedback variants.
• MPL-B430P-MK22AA: Frame B, 4.3 N·m continuous stall, 460V, incremental encoder, no brake.
• MPL-B430P-HK72AA: Frame B, 4.3 N·m, 460V, multi-turn absolute encoder, current production.
• MPL-B540P-MK22AA: Frame B, 5.4 N·m continuous stall, 460V, incremental encoder, legacy feedback.
• MPL-B540P-HK72AA: Frame B, 5.4 N·m, 460V, multi-turn absolute encoder, active production.
• MPL-B680P-MK22AA: Frame B, 6.8 N·m continuous stall, 460V, incremental encoder, no brake.
• MPL-B680P-HK72AA: Frame B, 6.8 N·m, 460V, multi-turn absolute encoder, Kinetix 5700 compatible.

Frame Size C — Medium Torque (Continuous Stall Torque: 7.5–20 N·m)

• MPL-C1510F-HJ72AA: Frame C, 15.1 N·m continuous stall, 230V, multi-turn absolute encoder, no brake.
• MPL-C1510V-HJ72AA: Frame C, 15.1 N·m, 460V, multi-turn absolute encoder, active production.
• MPL-C2310F-MK22AA: Frame C, 23.1 N·m continuous stall, 230V, incremental encoder, legacy variant.

Frame Size D/E/F — High Torque (Continuous Stall Torque: 20–220+ N·m)

• MPL-D1510V-HJ72AA: Frame D, high-torque class, 460V, multi-turn absolute encoder, suitable for heavy-load axes.
• MPL-E1510V-HJ72AA: Frame E, 460V, multi-turn absolute encoder, large-frame high-inertia load applications.
• MPL-F4530F-HJ72AA: Frame F, maximum torque class, 230V, multi-turn absolute encoder, extruder and press applications.

Sourcing Hard-to-Find & Obsolete MPL Series Parts

A substantial portion of the MPL Series installed base — particularly units with MK22, MK24, and ME23 feedback suffixes — has entered end-of-life or limited-availability status through Rockwell Automation's standard distribution channels. For facilities operating Kinetix 6000 or Kinetix 6200 drive systems commissioned prior to 2015, direct OEM replacement is frequently unavailable within acceptable lead times, creating unplanned downtime risk in continuous-process industries.

DriveKNMS maintains a dedicated inventory of MPL Series servo motors sourced through verified industrial surplus and OEM-authorized channels. Our procurement scope covers: discontinued MK-suffix feedback variants, brake-equipped configurations (suffix -B), washdown and food-grade variants, and frame sizes A through F across both 230V and 460V voltage classes. All units are cataloged by full part number including feedback suffix, voltage code, brake code, and shaft configuration to ensure exact-match replacement without drive parameter reconfiguration.

For critical spares planning, DriveKNMS can provide multi-unit quotations, consignment stock arrangements, and cross-reference analysis to identify compatible modern replacements (e.g., HK72AA or HJ72AA feedback variants) where exact legacy matches are unavailable.

Quality Control for the MPL Series Range

MPL Series servo motors present specific inspection requirements due to their integrated feedback encoder assemblies, resolver-to-digital conversion circuitry (on legacy variants), and precision bearing preload specifications. DriveKNMS applies the following test protocol to all MPL Series units prior to shipment:

• Winding resistance and insulation test: Phase-to-phase resistance balance verified; insulation resistance measured at 500V DC (minimum 100 MΩ).
• Encoder signal verification: Incremental encoder A/B/Z channel output verified at rated speed using a servo analyzer. Absolute encoder battery voltage and multi-turn data integrity confirmed on HJ/HK suffix variants.
• Bearing inspection: Manual rotation check for roughness, axial play measurement, and radial runout verification per Rockwell Automation service tolerances.
• Brake function test: On brake-equipped variants, holding torque verified against nameplate specification; release voltage and current draw confirmed within specification.
• Thermal sensor continuity: PTC thermistor resistance verified within the 25°C nominal range (typically 100–120 Ω for standard MPL thermistors).
• Nameplate and label audit: Full part number, date code, and serial number cross-referenced against Rockwell Automation catalog data to confirm authenticity and specification compliance.

For MPL Series availability, pricing, and technical cross-reference support, contact DriveKNMS directly:

• Email: [email protected]
• WhatsApp: +86 18359293191
• Web: driveknms.com