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The ABB FEN-31 68978840 is a htl encoder interface module for ABB drive feedback systems. It is used to receive HTL encoder signals for motor speed and position feedback. The ABB FEN-31 68978840 is identified by its complete ordering code and documented hardware function. Confirm the installed system, module revision, connector arrangement and supported interface before replacement. Install the ABB FEN-31 68978840 only in the approved ABB drive option slot. Follow the manufacturer's system documentation for power isolation, grounding, wiring, configuration and commissioning.
This FEN-31 module receives HTL encoder signals for ABB drive speed and position feedback.
Check the HTL encoder, F-series option slot and connected drive arrangement before selection.
Label the feedback conductors, restore the interface and verify scaling, direction and position data.
Confirm the complete article number FEN-31 68978840, the description “HTL Encoder Interface Module” and the installed configuration. The supplied unit marking, revision and associated interfaces should agree before replacement.
Match the documented system (F-series encoder interfaces), connection or mounting arrangement and service scope. Do not substitute by physical similarity alone.