Upgrading from Commander SK to Unidrive M400 & Commander C

Unidrive M400 & Commander C200 & C300 enhancements over Commander SK

Upgrading Commander SK to Commander C

Unidrive M400 and Commander C200 & C300 general purpose drives deliver a range of performance, hardware, programming and software innovations over Commander SK.

Due to an intuitive LCS display created for rapid set-up and a clear diagnostic, the variable speed drive Unidrive M400 will minimize downtime. This drive has an integrated PLC that can execute a substantial range of sequencing and logic programs.

The Commander C will get you up and running, from out of the box to controlling your motor, in minutes. There are just three simple steps will set up your drive for most fan, pump, compressor, conveyor and general purpose applications.

  • Compatibility


    • Compatible physical dimensions, weights and surface mount footprint
    • When retrofitting surface mount drives, existing mounting holes can be reused - negating the need for additional drilling. Mounting holes are in the same place or retrofit kits are available


    • Power and control wiring adopt the same philosophy as Commander SK


    • The same menu and parameter structure is adopted by Commander C
    • Connect Software can be used to transfer parameters from Commander SK to Commander C

  • Performance

    Performance Innovations

    • New Rotor Flux Control (RFC) mode which improves motor control and stability and delivers higher overload currents by using a closed loop current control algorithm

    • Patented fan intelligence controls the fan speed in order to optimize Commander C's cooling profile

  • Programming and Software

    Transfer parameters without mains power

    • AI-Backup adaptor option can be used to power the drive with 24 Vdc to maintain communications and interrogate parameter settings
    • Standard SD cards used with AI-Backup adaptor can transfer and clone parameter

    LCD keypads have informative, multi-language, 3 line displays for easier and faster set up and diagnosis

    • CI-Keypad – Drive mounted LCD keypad (M400 only)
    • Remote keypad – Rapid panel mount (1 x 32Ø hole) IP66 (C200-C400 with AI-485 adaptor)
  • Hardware

    Hardware Innovations

    • Commander C200-C300 can survive environments as described by IEC60721-3-3 3C3 and EN60068-2-60 Meth. 4
      • PCBs are conformal coated for increased resilience to conditions and greater reliability
      • Patented air duct system protects critical components
      • The IP rating has been increased from IP20 to IP21
    • Higher level of integration with machine safety systems
      • Commander C200 and C300 have dual channel SIL3/PLe ‘Safe Torque Off’ (STO) input
    • New cable management design
  • Lifecycle

    Unidrive M is capable of fully replacing and enhancing Commander SK installations. Therefore, Commander SK is moving into next stage of its lifecycle.




    Commander SK entered the maintenance period in 2017, volume production has ceased, but contractual obligations regarding warranty, service and repairs will continue.

    The maintenance period is expected to last ten years subject to raw material and component availability. Updates will be issued to customers throughout the lifecycle period. Local sales representatives are always available to answer any customer queries.

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