Description

Product Overview

The Allen‑Bradley 1326AB-B720E-21 is a Torque Plus three-phase brushless AC synchronous servo motor built for high-performance motion control systems paired with Allen‑Bradley 1394 digital servo drives. This permanent magnet motor delivers high continuous torque and fast dynamic response, using a sinusoidally wound stator and brushless resolver for precise position and velocity feedback without fragile on-board electronics. It solves motion control challenges including sluggish acceleration, torque drop at operating speed and position drift in high-cycle machinery. Machine builders and maintenance teams rely on this motor for retrofits and spare replacements on legacy high-speed automation equipment. The TENV enclosed aluminum housing with integrated cooling fins maintains stable thermal performance, and the resolver feedback withstands shock and vibration common in heavy manufacturing environments. Word count overview:175

Technical Specifications

• Product Model: 1326AB-B720E-21
• Brand: Allen‑Bradley
• Warranty: One Year
• Input Voltage: 380 / 460 V AC three-phase
• Operating Temperature: 0 °C to 40 °C (full rating; derate above 40°C)
• Storage Temperature: -40 °C to 85 °C
• Response Time: High dynamic torque response, low mechanical inertia
• Protection Class: IP65 (standard shaft seal)
• Accuracy Class: Resolver-based position feedback, high repeatability
• Output Frequency: Dependent on drive speed command
• Rated Current Range: 17.5 A continuous
• Communication Interface: Resolver feedback, separate power and feedback connectors
• Supported Protocols: Resolver analog feedback for 1394 motion controller
• Overload Capacity: Built-in thermal switch winding protection; peak torque capability
• Dimensions: 194 mm frame diameter, IEC metric flange mount