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What is the difference between a PowerFlex 4 and PowerFlex 4M

This article describes the differences between the PowerFlex 4 and PowerFlex 4M VFD Drives

Two Main Differences:
  1. Input wiring on the PowerFlex 4M is on the Top of the VFD, and on the PowerFlex 4 the input wiring is on the bottom
  2. Frequency Control on the PowerFlex 4M has a maximum frequency setting of 400 Hz, the PowerFlex 4 has a maximum frequency setting of 240 Hz Max