ac-fan-control-ac-motor-control-smartfan-nimbus

SmartFan® Nimbus – AC Fan Control / AC Motor Control

  • User Programmable Single Phase TRIAC Controller
  • Control Signal options: 2-10 VDC, 4-20mA, Thermistor, Transducer
  • 50 Piece Pricing as low as $29.70 each
  • Factory Customization for Orders as Low as 50 Pieces
Operation / Installation PDF

Nimbus Datasheet

SmartFan Nimbus AC motor speed control is designed to control AC motors, pumps and fans in HVAC, electronics and industrial control applications. Nimbus provides AC motor speed control for single phase AC motors approved for voltage control in applications including; humidity control, clean room pressurization, equipment cooling, exhaust ventilators, duct fans & blowers. Nimbus accepts 115 or 230 VAC power source and provides AC motor speed control from a control signal (0-20 mA, 0-10 VDC), remote transducer or up to three remote temperature sensors.

Automatic voltage and frequency detection, current ratings up to 7.5 Amps and three mounting and connection configurations make this AC motor speed control extremely flexible and economical. Benefits of using SmartFan Nimbus for AC motor speed control include acoustical noise reduction, environmental (humidity, temperature or pressure) regulation, greater product reliability, improved safety and energy savings.

CAUTION – SmartFan Nimbus is designed for OEMs (Original Equipment Manufacturers) and is not intended for end-user or after-market applications. The Nimbus should only be used with compatible induction motors (Permanent Split Capacitor (PSC) or Shaded Pole) that are approved by the motor manufacturer for TRIAC (voltage) control. Attempting to control a fan or motor that is not compatible could cause excessive heating and/or permanent damage to the motor.

Control Comparison & Motor Efficiency – See technical article on how the Nimbus AC motor speed control compares to other controller technologies.

Specifications Features / Selectable Options
  • » Power source: 95 – 250 VAC, automatically detected.
  • » Frequency: 47-64 Hz, automatically detected.
  • » AC Motor Type Compatibility (automatically detected)
    • – voltage controllable PSC (Permanent Split Capacitor)
    • – Shaded Pole
  • » Current ratings: 2.5A to 7.5A (at 40°C still air)
  • » AC Motor Speed Control based on:
    • – 4-20 mA control signal
    • – 2-10 VDC control signal
    • – Up to three remote temperature sensors (supplied separately)
    • – Remote transducer (humidity, pressure, flow, etc.)
  • » Full voltage start pulse
  • » RoHS 6/6 compliant
  • » UL recognized to UL508, CSA-C22.2, File E100344
  • » Mounting options:
    • – PCB mount
    • – DIN Rail mount
    • – 4×4 electrical job box mount
  • » Connections:
    • – Terminal block
    • – 18 AWG wires (job box only)
  • » Dip switch allows user selectable settings of:
    • – 4 control (full speed) temperature settings
    • – 2 slope (difference between full and idle) settings
    • – 4 idle speeds
    • – Motor on/off threshold
    • – 10 pressure settings
    • – 64 fixed speed settings
  • » Temperature alarm output

Nimbus AC Fan & Motor Speed Controller Dimensions

SmartFan Nimbus AC motor speed control Nimbus Diagram

X = 0.86″ (21.8mm) for 240x2xxx-F
X = 1.06″ (26.9mm) for 240x6xxx-F
X = 2.06″ (52.3mm) for 240x7xxx-F

SmartFan Nimbus AC motor speed control Nimbus Diagram2

Electrical job box mount style CRI# 240x3Wxx-F or 240xJWxx-F

For CAD drawings, use the links in Additional Information below.

Nimbus AC Fan & Motor Speed Controller Part Numbers

Part Number Current Ratings
(Amps @ 40C)		 Packaging Connections Control Options Stock Product
240B2T00-F 0. 15 to 2.5 PCB Terminal Blocks 4-20mA or
2-10VDC or
Transducer1or
Temp Sensor1or
Fixed Speed		 Yes
240B6T00-F 0.5 to 6.0 PCB Terminal Blocks
240B7T00-F 0.5 to 7.5 PCB Terminal Blocks
240B3W00-F 0.15 to 2.5 Job Box Cover Plate 18 AWG Wires
240BJW00-F 0.5 to 7.0 Job Box Cover Plate 18 AWG Wires
240T2T00-F 0.15 to 2.5 PCB Terminal Blocks Transducer1or
Temp Sensor1or
Fixed Speed		 No
50 Piece
Minimum Order
240T6T00-F 0.5 to 6.0 PCB Terminal Blocks
DIN350-F Optional Plastic DIN Rail Mount (compatible with PCB package only – click for dimensions)

1 When used in the temperature sensor or transducer control mode, a sensor is required. Choose an air, surface or liquid thermistor temp sensor from Control Resources or use your own transducer.

Ordering Information: The Nimbus is designed for Original Equipment Manufacturers (OEM) and is not intended for end-user or aftermarket applications. The Nimbus should only be used with compatible induction motors (Permanent Split Capacitor (PSC) or Shaded Pole) that are approved by the motor manufacturer for TRIAC (voltage) control prior to use. Attempting to control a motor that is not compatible could cause excessive heating and/or permanent damage to the motor.

Additional Information

» Nimbus Operation / Installation Datasheet (PDF)
» Nimbus 2A 3D CAD drawing 
» Nimbus 6A 3D CAD drawing 
» Nimbus 7A 3D CAD drawing 
» SmartFan Price List (PDF)
» Click here for Questions or Comments

To talk to an Engineer or Service Representative, call (978) 486-4160 (9:00 AM – 5:00 PM EST)

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Initially designed for our own engineering lab, CRI also offers versatile, low cost test equipment for test benches, laboratories, field work and repair facilities.