SmartFan®Nimbus

AC Motor Speed Control

SmartFan Nimbus AC motor speed control Nimbus

SmartFan Nimbus AC Motor Speed Control

Fig. 1: Nimbus AC motor speed control CRI #240B7T00 with DIN350 DIN
rail mount kit sold separately.
Fig. 2: Nimbus AC motor speed control CRI #240B2T00
Fig. 3: Nimbus AC motor speed control CRI #240BJW00
with 4×4 Job Box
(not supplied) in background

SmartFan Nimbus AC Motor Speed ControlOperation/Installation Manual

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 AC motor speed control products are designed for OEMs (Original Equipment Manufacturers) and are not intended for end-user or after-market applications. SmartFan AC motor speed control products should only be used with compatible induction motor (Permanent Split Capacitor (PSC) or Shaded Pole) that are approved by the motor manufacturer and thoroughly validated for voltage control prior to use. 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.

Product Features – SmartFan Nimbus AC Motor Speed Control

  • Power source: 95 – 250 VAC, automatically detected.
  • Frequency: 47-64 Hz, automatically detected.
  • AC Motor Type Compatibility:voltage controllable PSC (Permanent Split Capacitor) or Shaded Pole, motor type automatically detected
  • Full voltage start pulse
  • Does not require a separate low voltage power source
  • Temperature alarm output when control is based on remote temperature sensor(s)
  • UL recognized to UL508, CSA-C22.2, File E100344

Selectable Options – SmartFan Nimbus AC Motor Speed Control

  • Current ratings: 2.5A to 7.5A (at 40°C still air)
  • AC Motor Speed Control based on:
    0-20 mA control signal
    0-10 VDC control signal
    Up to three remote temperature sensors (supplied separately)
    Remote transducer (humidity, pressure, flow, etc.)
    On board pressure transducer
  • 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
  • Sensors
SmartFan Nimbus AC motor speed control Nimbus Diagram

Fig. 4
X = 0.86″ (21.8mm) for 240x2xxx
X = 1.06″ (26.9mm) for 240x6xxx
X = 2.06″ (52.3mm) for 240x7xxx

SmartFan Nimbus AC motor speed control Nimbus Diagram2

Fig. 5
Electrical job box mount style CRI# 240x3Wxx or 240xJWxx

Part Numbering System1 – SmartFan Nimbus AC Motor Speed Control

Nimbus2 Control
Mode3		 Current
Rating5 /
Packaging		 Connector Special
Features
240

B = Current, voltage, temperature, remote transducer
or fixed speed

T2 = Temperature and remote transducer
only

 2 = 0. 15 to 2.5 Amps

3 = 0. 15 to 3.0 Amps  (Job Box only)

6 = 0. 50 to 6.0 Amps

7 = 0. 50 to 7.5 Amps

J = 0. 50 to 7.0 Amps  (Job Box only)		 T = Terminal Block

W = 18awg wires (Job Box only)		 00 = standard

J = 0. 50 to 7.0 Amps (Job Box only)
T = Terminal Block
W = 18awg wires (Job Box only)
00 = standard

1Confirm TRIAC (voltage) controllability with the fan/motor manufacturer before ordering.
2Nimbus part numbers are RoHS 5/6 (contains lead) compliant. For full 6/6 compliance, add a “-F” suffix to the part number.
3When used in the temperature or remote transducer control mode, a sensor (sold separately) is required.
Choose an air, surface or liquid temperature sensor or humidity sensor from the CRI catalog or via your own transducer.
4A minimum order of 50 units is required to supply T models.
540°C, still air, max current rating.

Stock Product
240B2T00 (Fig. 2)

240B3W00

240B6T00

240BJW00 (Fig. 3)

DIN Rail Option (Fig 1):
Units supplied in circuit board form may be mounted on a DIN rail using DIN rail kit CRI #DIN350-F.

Manual Pages – SmartFan Nimbus AC Motor Speed ControlOperation/Installation Manual

Use the links below for addtional manual pages or for a complete manual (9 pages), click on the Operation/Installation Manual PDF link above.

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