Motor Systems Inc. is the ONLY authorized service and repair center for Pacific Scientific Drives. Our team offers factory repair services, reconditioned units, and technical assistance.

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Pacific Scientific SC904-001-01 Servo drive repair
SC904 Pacific Scientific Single Axis Resolver Based Brushless Digital Servo Drive.


  • 10.6 Amps Continuous
  • 21.2 Amps peak
  • 230 VAC
  • Digital and analog I/O
  • IGBT Power Stage
  • Digital Auto Tune
  • Removable option cards
  • Personality parameters saved in drive
  • or option card EPROM
We offer:
  • Repair services and can supply all variations of the SC904 servo drive. If you need a different model than the standard SC904-001-01 drive, rest assured we can repair or supply you with a replacement unit.
  • Expedite repair service to get you up and running as quick as possible.
  • Well equipped shop staffed by factory trained technicians.
  • Factory supplied test fixtures, documentation and inventory to repair and test all functions of your drive and motor.
  • Replacements for un-repairable circuit boards with boards from our extensive stock to get your drives repaired back to original factory specifications.
  • Extensive stock of fully tested reconditioned drives and motors to get you up and running quickly.
  • SC904 Manual
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