Commander C General Purpose AC Drives

Simple, durable general purpose AC motor control

Commander C200 & C300


0.33 hp – 200 hp (0.25 kW – 132 kW) Normal Duty
0.33 hp – 150 hp (0.25 kW – 110 kW) Heavy Duty
115 V | 208 - 240 V | 380 - 480 V | 575 V | 690 V

Commander variable speed drives have established the standard of excellence in motor control since 1983 when Control Techniques launched the first world commercial vector drive. Since then, Commander has undergone several successful enhancements, each time bringing new technology and innovations to the world of automation.


The new Commander C series has been designed to be a simple and compact AC motor speed controller that meets advanced requirements for a wide range of applications while optimizing the user experience.

Commander C Highlights

✓ Set just 4 parameters to get your drive started
✓ Plug-in options for advanced control
✓ Dual Safe Torque Off (STO)
✓ Equipped with the latest energy saving features
✓ Up to 180% overload for high torque applications
✓ On board PLC
✓ Straightforward installation and commissioning
✓ Easy motor pairing and performance control
✓ Robust and reliable design


Simple set up. 3 steps to control

Setting up a drive can require training, specialist knowledge and time.

But Commander C will get you up and running, from out of the box to controlling your motor, in minutes.

Three simple steps will set up your drive for most fan, pump, compressor, conveyor and general purpose applications! 

 ac variable speed controller setup install


  • Specifications
    Control Mode
    Open loop vector or V / Hz induction motor control  ✓  
    Open loop Rotor Flux Control for induction motors (RFC-A)  ✓ 
    Ambient Operating Temperature Size 1 - 4: -20°C to 40°C (-4°F to 104°F) @ 3 kHz switching freq. | Operation to 60°C (140°F) with de-rating
    Size 5 - 9: -20°C to 40°C (-4°F to 104°F) @ 3 kHz switching freq. | Operation to 55°C (131°F) with de-rating
    Cooling Method Forced convection
    Humidity 95 % non-condensing at 40 °C (104 °F)

    Storage Temperature

    Size 1 - 4: -40°C to 60°C (-40°F to 140°F) — 24 months Max.
    Size 5 - 9: -40°C to 55°C (-40°F to 131°F) — 24 months Max.
    Altitude De-rate the continuous output current by 1% for every 100 m (328 ft) above 1000 m (3,280 ft) to a maximum of 3000 m (9,840 ft)
    Vibration Tested in accordance with IEC 60068-2-64 and IEC 60068-2-6
    Mechanical Shock Tested in accordance with IEC 60068-2-27 and IEC 60068-2-29
    Enclosure Rating IP20, NEMA 1 conduit kits available
    Electromagnetic Capability IEC/ EN 61800-3 Immunity and Emissions
    EN 61000-6-2: Immunity for industrial environments
    EN 61000-6-4: Emissions for industrial environmentsM/br> EN 61000-3-2: Harmonic current emissions
    An EMC data sheet is available on request
    RoHS Complies with the Restriction of Hazardous Substances Directive (2011/65/EU)
    AC Supply Requirements

    100 V models: 100 to 120 Vac ±10%
    200 V models: 200 to 240 Vac ±10%
    400 V models: 380 to 480 Vac ±10%
    500 V models: 500 to 575 Vac ±10%
    690 V models: 500 to 690 Vac ±10%

    Phase 1Ø and 3Ø (Model dependent)
    Maximum Supply Imbalance 2% negative phase sequence, 3% voltage imbalance between phases
    Input Frequency  45 to 66 Hz
    Input Displacement Power Factor 0.97
    Switching Frequency Size 1 - 4: 0.667, 1, 2, 3, 4, 6, 8 12 & 16 kHz
    Size 5 - 9: 2, 3, 4, 6, 8 12 & 16 kHz
    Output Frequency Range  0 to 550 Hz
    Frequency Accuracy ±0.02% of full scale
    Frequency Resolution  0.01 Hz
    Analog Input Resolution  Voltage mode: 11 bits (unipolar) Current mode: 11 bits
    Braking  Dynamic braking transistor included, requires external resistor
    DC Bus Undervoltage Trip 100 V models: 175 Vdc
    200 V models: 175 Vdc
    400 V models: 330 Vdc
    DC Bus Overvoltage Trip  Frame sizes 1 - 4:
    100 V models: 510 Vdc
    200 V models: 510 Vdc
    400V models: 870 Vdc
    Frame size 5 - 9:
    200V models: 415 Vdc
    400 V models: 830 Vdc
    Drive Overload Trip Programmable: Default settings: 180% for 3s, 150% for 60s
    Instantaneous Overcurrent Trip  220% of rated motor current
    Phase Loss Trip  DC bus ripple threshold exceeded
    Over-temperature Trip  Drive heatsink temperature exceeds 95°C (203°F)
    Short Circuit Trip  Protects against output phase-to-phase fault
    Ground Fault Trip  Protects against output phase-to-ground fault
    Motor Thermal Trip  Electronically protects the motor from overheating due to loading conditions
    Approval & Listings
    UL, cUL UL file NMMS/8: E171230
    CE  CE approval
    EU  These products comply with the Restriction of Hazardous Substances Directive (2011/65/EU), the Low Voltage Directive (2014/35/EU) and the Electromagnetic Compatibility Directive, (2014/30/EU).
    RCM  RCM Registered supplier No. 12003815281
    ISO  Manufacturing facilities comply with ISO 9001:2015 and ISO 14001

    C300 models only: The Safe Torque Off (STO) function may be used as a safety component of a machine.

    Type examination certificates by TÜV Rheinland:
    Frame sizes 1 - 4: No. 01/205/5383.03/18
    Frame sizes 5 - 9: No. 01/205/5387.02/18

    Functional safety parameters:
    EN ISO 13849-1 - Cat 4, PLe
    EN61800-5-2/EN62061/IEC 61508 - SIL 3

    UL functional safety approval: FSPC E171230

  • Applications
    Whatever your application, Commander C is the perfect solution across industries

    The Commander series are simple and compact AC motor speed controllers that meet advanced requirements in a wide range of applications. Their small footprint – among the smallest in their class – makes them ideal for machine builders and OEMs, where space is at a premium.

    motor control of pumps ventilators and compressors with general purpose variable speed drives
    Pumping, Ventilating & Compressing
    • Improved energy efficiency during periods of low demand
    • On board PLC & PID functionalities make advanced control easy and efficient without the need of an external controller
    • Skip Frequencies allow users to easily avoid equipment resonant frequencies, reducing high vibration levels
    • Supply Loss Ride Through will keep the drive up and running through most power disturbances
    general purpose drives for accurate remote speed control of conveyor belts
    • Accurate remote speed control with fieldbus communications
    • S-ramp acceleration / deceleration profiling provides smooth speed transitions minimizing machine jerk
    • Avoids early wear and tear of the equipment
    • Overload capacity up to 180%
    Control Techniques general purpose drives for lifting hoisting and winching
    Lifting, Hoisting & Winching
    • Adjustable mechanical brake sequencing with torque proving function
    • Embedded PLC functionality can manage local I/O reducing the need for an external controller
    Access control variable speed drives for motion control
    Access Control
    • Smooth motion with enhanced open loop control
    • Small physical size allows the drive to be mounted easily in smaller enclosures
    • Highly reliable in harsh environments, providing long lasting service
    general purpose drives for stable motor control for processing mixers kneaders agitators extruders
    Processing (Mixers, Kneaders, Crushers, Agitators, Centrifuges, Extruders)
    • Ease of integration to external PLC or other management systems through networking options
    • Conformal coating for enhanced environmental protection
    • Overload capacity up to 180%
    • Highly stable motor control
  • Options

    Remote Keypad RTC

    The keypad is remote mountable, allowing flexible mounting on the outside of a panel (meets IP54/NEMA 12). Three line plain text, multi-language LCD keypad for rapid set-up and helpful diagnostics. Battery operated real-time clock allows accurate time stamping of events, aiding diagnostics.

    Remote Keypad for Variable Speed Drives

    Remote Keypad

    Remote mountable, intuitive plain text, multilingual LCD keypad for rapid set-up and superior diagnostics (using the AI-485 adaptor along with a comms lead). Rapid and secure panel fit with 1 x 32mm hole rated to IP66 (NEMA 4).

    System Integration Modules - Communications

    SI-Profibus Communication System Integration Modules


    SI-PROFIBUS interface module enables follower connectivity. It is possible to use multiple SI-PROFIBUS modules or a combination of SI-PROFIBUS and other option module types to add additional functionality such as extended I/O, gateway functionality or additional PLC features.

    SI-Devicenet Communications System Integration Module


    SI-DeviceNet enables follower connectivity. It is possible to use multiple SI-DeviceNet modules to provide additional functionality.

    SI-CANopen Communication System Integration Module


    Commander C's SI-CANopen interface module supports various profiles, offering optimum flexibility.

    SI-Ethernet Communication System Integration Module


    SI-Ethernet can be used to provide high speed drive access, global connectivity and integration with IT network technologies.

    SI-EtherCAT Communications System Integration Module


    SI-EtherCAT allows Commander C general purpose drive to connect and interface with EtherCAT networks.

    SI-Profinet Communications System Integration Module


    SI-PROFINET-V2 allows Commander C to communicate and interface with PROFINET PLCs and networks.



    Interbus interface modules.

    System Integration Modules - Additional I/O

    SI-IO System Integration Module


    Extended I/O interface module to increase the number of I/O points on a drive. Provides additional: 4 x Digital I/O, 3 x Analog inputs (default)/Digital inputs, 1 x Analog output (default)/Digital input, 2 x Relays.

    Optional Accessories

    AI-Back-up Adaptor

    Port adaptor for SD card parameter cloning, and an input for 24 V back-up.


    AI-Smart Adaptor

    Has a built-in memory for parameter cloning and an input for 24 V back-up.


    AI-485 Adaptor

    Adaptor that allows the drive to communicate via RS485.


    AI-485 24 V Adaptor

    Adaptor with 24 V input.  

    USB serial comms lead

    RS485 Cable

    The USB comms cable allows the drive to connect to a PC for use with Commander's PC tools.

  • Software & Support
    Intuitive commissioning software
    Connect commissioning software 
    Connect - Commissioning tool

    Based on Control Techniques’ 25 years' experience, Connect is our latest drive configuration tool for commissioning, optimizing and monitoring drive/system performance. 

    Advanced machine control
    Machine Control Studio - Programming tool

    Control Techniques' Machine Control Studio provides a flexible and intuitive environment for programming Commander C’s new automation and motion control features.

    Diagnostics Tool
    diagnostic tool app
    Diagnostic Tool

    Diagnostic Tool is a fast and simple tool, which allows users of Control Techniques' drives to quickly solve any error codes that the drive may show.

    Drive Setup
    Drive Setup section for step by step variable speed drive configuration
    Drive Setup

    Free access web pages provide ‘how-to’ videos, step by step guides and comprehensive technical manuals for your drive installation.
  • Product and Training Videos

    Control Techniques Commander C Product Video


    Control Techniques Commander Free 5-Year Warranty | T&Cs Apply




    Commander C Training Series

    Commander C200 Quick Start Guide


    Commander C200 Quick Start Guide Parameter Focus


    Commander C300 Quick Start Guide


    Commander C300 Quick Start Guide Parameter Focus


    SD Card Migration from Unidrive M300 to Commander C300


    Connect Migration from Unidrive M300 to Commander C300


    Keypad Migration from Unidrive M300 to Commander C300

  • Downloads
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