Allen-Bradley 20-750-UFB-1 Variable Frequency Drive

Allen-Bradley 20-750-UFB-1 is the Universal Feedback option module for PowerFlex 750-Series drives, enabling multi-encoder feedback support for PowerFlex 755 family drives and providing closed-loop speed and position control with a variety of encoder interfaces. The module supports Stegmann, Heidenhain, SSI, BiSS-C, and 5V Incremental encoders, delivering accurate feedback signals to the PF755's control loop. It is designed for installation in Slot 4 and/or Slot 5 of PF755 drives (PF755TL/TR/TS variants also support the option), and Rockwell documentation notes the PF755 configuration with 20-750-UFB-1 installed in Slot 4. The 20-750-UFB-1 ships with firmware for PowerFlex 750 series, identified as Universal Feedback v1.015, ensuring compatibility with PF750-series firmware. This option module integrates with the PF755 to enable use of a wide range of encoder technologies without changing the drive's core control architecture, making it suitable for applications requiring precise velocity and position feedback.