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MMRG31U-PCM DC Motor Control


The MMRG31U-PCM is one of the smallest full-wave four-quadrant drives on the makert today. This full-featured, compact drive matches brush-type DC motors ranging from 1/20 to 2HP.

The MMRG31U-PCM provides all the performance of a full size, four quadrant, regenerative variable speed drive and has our popular MM footprint (3.72 X 4.42). This drive will maintain motor speed with smooth motoring and braking torque and allow high-duty cycle reversing and braking. It has an adjustable current limit, 1% of base speed regulation and can regulate within a 50:1 speed range (open loop).


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  • MM footprint: An extremely compact size in an industry standard mounting footprint.
  • 4Q Reversing: Regenerative/4 Quadrant drives have the ability to perform quick, contactorless reversing on-the-fly!
  • Speed range and regulation: 1% regulation over 50:1 speed range.
  • User adjustable calibration pots: IR compensation, max speed, forward current limit, reverse current limit and forward and reverse acceleration.
  • Stopping Modes: User can decelerate (N.O.),regeneratively brake (N.O.) or coast to a stop (N.C.).
  • Spade terminals: Easy to use, lower cost and able to fit in smaller package.
  • Options and accessories: 201-0024 inhibit plug with 18 inch leads for regenerative brake option, 200-0386 limit switch logic board and a DLC600 digital controller.
  • -PCM option: Add a -PCM to the end of the part number to receive the drive with an isolation transformer daughter card.