Description
The Allen-Bradley MPL-B320P-MK74AA is a low-inertia, brushless AC rotary servo motor belonging to the Kinetix MP-Series (Bulletin MPL). It is engineered for high-performance industrial motion control applications requiring precise speed, acceleration, and positioning, such as automated packaging machinery, material handling systems, electronics assembly, and robotics.
Technical Specifications
| Parameter | Value |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Catalog / Part Number | MPL-B320P-MK74AA |
| Product Type | Low-Inertia Brushless AC Rotary Servo Motor |
| Voltage Class | 460 V AC (B Series) |
| Frame Size | 100 mm (3.94 in.) — Frame Size 3 |
| Magnetic Stack Length | 50.8 mm (2.0 in.) — Stack Length 20 |
| Rated Speed | 5,000 RPM |
| Feedback Type | Multi-turn High-Resolution Encoder (Absolute Feedback, Hiperface protocol) |
| Shaft Extension | Keyless Shaft Extension (No shaft key, no shaft seal) |
| Connector Type | SpeedTEC DIN Connector, Right Angle, 180° Rotatable (Quick Connect) |
| Holding Brake | Integrated 24 V DC Holding Brake |
| Mounting Interface | IEC Metric with Free Mounting Holes (Type FF) |
Availability and Commercial Terms
- Condition: New Factory Original / Surplus (verify exact packaging and date code status prior to issuing purchase orders)
- Lead Time: 1 to 3 business days for stock items; factory allocation or build lead times apply for non-stock configurations
- Warranty: 12-month standard replacement warranty covering manufacturing defects (verify vendor-specific terms if sourcing surplus channels)
- Pricing Note: Listed price is indicative, not final. Price subject to market conditions; contact us for a firm quote.
Field Integration and Operational Notes
When integrating the MPL-B320P-MK74AA motor into a motion control architecture, ensure it is paired with a compatible Allen-Bradley servo drive (such as the Kinetix 6000, Kinetix 6200/6500, or compatible Kinetix 5500/5700 systems via appropriate power/feedback conversion cables).
- Cabling: The unit utilizes a SpeedTEC right-angle circular DIN connector. Ensure mating cable assemblies are routed away from high-voltage power conduits to prevent electrical noise interference on the high-resolution multi-turn feedback signals.
- Brake Operation: The integrated 24 V DC holding brake is designed for holding static loads when power is removed, not as a dynamic stopping mechanism. Ensure proper sequence programming in your motion controller (e.g., Logix Designer) to engage the mechanical brake only after the axis has come to a complete zero speed stop.
- Mechanical Alignment: Because this unit features a keyless shaft extension, use precision-machined clamp-style couplings to prevent slippage during high-acceleration/deceleration cycles.
Frequently Asked Questions
Q: What is the difference between low-inertia and medium-inertia MPL motors?
A: Low-inertia motors feature a smaller rotor mass, allowing for faster acceleration and deceleration rates, making them ideal for point-to-point positioning applications that demand high dynamic response.
Q: Does the multi-turn encoder require battery backup?
A: Yes, absolute multi-turn encoders track motor shaft revolutions even when control power is off, typically relying on a controller-mounted or drive-mounted battery module to retain absolute position data across power cycles.
Q: Can this motor operate in wet or washdown environments?
A: The standard MPL-B320P-MK74AA configuration does not feature a shaft seal and carries a standard IP rating suitable for clean industrial environments. For washdown or corrosive environments, consult the catalog for Bulletin MPL variants equipped with factory-fitted shaft seals and food-grade protective coatings.
