Allen‑Bradley MPL-A320P-H-X229 Low Inertia AC Servo Motor

Product Overview

Model Code Decoding

• MPL: Low inertia rotary servo motor series
• A: 230V (200V class) AC input voltage
• 3: Frame Size 3, 100mm IEC mounting flange
• 20: 2-inch (50.8mm) magnet stack length
• P: Base rated speed 3000 RPM, max operating speed 5000 RPM
• H: Circular bayonet rotatable right-angle dual power/feedback connectors
• X229: Factory special custom configuration (special encoder, shaft or environmental upgrade standard AA models do not carry this suffix)

Core Electrical & Mechanical Specifications

Electrical Performance

• Rated voltage: 230 VAC three-phase
• Rated continuous stall torque: 3.05 N·m (27 lb-in)
• Peak torque: 7.9 N·m (70 lb-in)
• Rated speed: 4500 RPM; Max speed: 5000 RPM
• Rated output power: ~1.4 kW
• Rotor inertia: 0.000078 kg·m² ultra-low inertia
• Frequency range: 0–333 Hz
• Winding insulation: Class F high-temperature winding
• Brake: No built-in 24VDC holding brake

Mechanical & Structure

• Mounting standard: IEC metric FF flange, 100mm frame
• Shaft: Keyed solid output shaft (standard with keyway, no standard shaft seal)
• Connector: Dual circular bayonet rotatable right-angle plugs (power + encoder feedback)
• Weight: ~3.63 kg (8 lbs)
• Enclosure: TENV totally enclosed non-ventilated, standard IP54; optional shaft seal kit upgrade to IP66
• Cooling: Natural convection heat dissipation, integrated high-efficiency thermal structure

Feedback System

Environmental Parameters

• Operating temperature: 0°C ~ +40°C continuous full load
• Storage temperature: -40°C ~ +85°C
• Humidity: 5%–95% non-condensing
• Vibration/shock: Compliant with IEC 60068 industrial vibration standards
• Certifications: UL, cUL, CE industrial automation certified

Main Functions

1. High Dynamic Fast Acceleration Motion Output

    

   Ultra-low inertia rotor design realizes ultra-fast acceleration/deceleration response, short positioning settling time, ideal for high-cycle repeated reciprocating axes. Rare-earth permanent magnet rotor delivers high torque density under compact volume.
2. Precision Closed-Loop Position & Velocity Control

    

   2000-line high-resolution encoder provides real-time position/velocity feedback to Kinetix servo drives, supports micron-level positioning accuracy for cutting, positioning and indexing processes. Built-in Smart Motor chip automatically uploads motor characteristic data to the drive for one-click auto-tuning.
3. Continuous Stable Torque Output at Low Speed

    

   Optimized sinusoidal winding design minimizes torque ripple, maintains smooth constant torque output at zero/low speed without jitter, suitable for tension control, precision feeding and slow-speed precision machining.
4. Flexible Multi-Axis Synchronous Motion Matching

    

   Compatible with full Kinetix motion platform, supports electronic gear, cam profiling, gantry synchronous control, multi-axis interpolation coordinated movement via EtherNet/IP network.
5. Harsh Environment Stable Operation

    

   Fully sealed TENV housing prevents dust, oil mist ingress; wide operating temperature range adapts to enclosed cabinets, workshop oily and dusty production environments. Rotatable bayonet connectors allow 180° wiring direction adjustment to simplify cabinet cable layout.
6. Custom Special Industrial Adaptation (X229 Suffix)

    

   X229 factory custom version optimizes anti-vibration structure, encoder noise suppression and shaft load tolerance for heavy-duty continuous cycle equipment, stronger adaptability than standard AA suffix general models.

Key Advantages

• Ultra-low inertia rotor delivers outstanding dynamic response, faster start-stop than medium/high inertia motors for high-speed automation equipment
• Compact 100mm frame with 2-inch stack balances torque output and installation space, saving machine mechanical design volume
• Smart Motor automatic parameter identification reduces on-site commissioning time, no manual motor parameter input
• Rotatable dual circular connectors support flexible wiring routing, compatible with unified MP series servo cable system
• TENV fully sealed structure eliminates fan failure risk, lower maintenance workload for 24/7 continuous production lines
• Discontinued original special custom model, stable spare part supply via refurbished aftermarket with full electrical performance testing
• Matches all mainstream Rockwell Kinetix servo drives, seamless integration with CompactLogix/ControlLogix Logix motion control systems

Typical Applications