Product Overview

The Allen-Bradley 1391-DES45-DI-AQB is a high-performance digital AC servo controller drive engineered by Rockwell Automation for precision motion control applications. As the flagship model of the 1391-DES product family, the 1391-DES45-DI-AQB delivers the highest power and current output within its series, providing a robust solution for demanding industrial automation environments -2. This microprocessor-based digital servo drive is specifically designed to operate with Allen-Bradley’s Bulletin 1326 series AC servo motors, offering seamless integration and optimized performance for single-axis motion control applications -1-2.

The 1391-DES45-DI-AQB features an integrated display user interface with a 2-line, 16-character LCD screen and a 5-button keypad, enabling convenient local configuration and parameter adjustment -2. This human interface module (HIM) significantly reduces setup time and simplifies troubleshooting without requiring external programming tools. The drive also incorporates a quad encoder output configuration with selectable pulse resolutions of 2048, 1024, 512, and 256 pulses per motor revolution, providing flexibility to match the feedback resolution required for different positioning accuracy needs -1-2.

As a core component of the 1391-DES series, the Allen-Bradley 1391-DES45-DI-AQB converts three-phase AC input power into a controllable voltage with variable amplitude, phase, and frequency to precisely regulate the speed and torque of permanent magnet AC servo motors -2. Its advanced PWM (Pulse Width Modulated) architecture delivers smooth, efficient motor control while maintaining a compact form factor that supports add-on components for enhanced scalability -1. The 1391-DES45-DI-AQB is a fundamental building block for computer-assisted closed-loop positioning systems, controlling the position, linear, or rotational movement of machine parts on automated equipment -2.

Technical Specifications