The ABB FEN-31 Inverter Interface Module is a plug-in interface for ABB drives that delivers encoder feedback and communication capabilities for inverter control. In ABB variable frequency drives (VFDs) and motor control systems, it connects external encoders to support closed-loop speed and position control, with support for both incremental and absolute encoders. Used across conveyors, pumps, fans, and manufacturing equipment, the FEN-31 enables precise motion performance and is a common replacement or retrofit part for ABB drive systems.
