pwm-fan-speed-control-smartfan-cirrus-9

SmartFan® Cirrus-9

  • PWM Fan Speed Control and Alarm for 4-wire Fans

  •    Temperature and/or I2C control and communications
Operation / Installation

pwm fan speed control smartfan cirrus 9icon user manual Cirrus-9 Datasheet

SmartFan Cirrus-9 is a PWM fan speed control and alarm that offers an off-the-shelf cooling solution for 4-wire fans and blowers. Cirrus-9 can control and monitor tach pulses from up to nine 12, 24, or 48 VDC 4-wire fans. The PWM fan speed control and alarm accepts fan speed control commands (including on/off) and provides individual pass/fail fan status via an I2C interface.

The I2C interface also provides temperature readings from an on-board thermistor and EEPROM storage. The Cirrus-9 can be configured for PWM fan speed control based on temperature or analog control signal (PWM, 5.0 VDC). Configuration of the Cirrus-9 PWM fan speed control and alarm is settable via I2C inteface or options can be set at the factory to your specifications.

I2C Design Tips: Check out our review of the advantages of using I2C communication for PWM fan speed control in telecom cooling applications.

In addition to the standard line of SmartFan controls and alarms, Control Resources also provides custom control design and manufacturing services to provide you with the optimum cooling solution for your OEM PWM fan speed control applications.

Specifications Features / Options
  • » Power source: 10 to 60 VDC
    • - up to 75V using SmartFan Storm DC power regulator
    • - single or dual feed

  • » Current Rating: 15 Amps @ 60°C or less

  • » Fans: Up to nine 12, 24, or 48 VDC 4-wire fans

  • » On-board 3.3 / 5.0 VDC isolated power for I2C and control signal interfaces

  • » Storage temperature: -40°C to 125°C

  • » Operating temperature: -20°C to 60°C

  • » Temperature accuracy and hysteresis: 2°C

  • » Weight: 4.6 oz (130 grams)

  • » RoHS (6/6) compliant

    		•
    • » Power feed options:
      • Single
      • Dual Active OR’d (positive and negative)
    • » Power source is fused with reverse polarity protection
    • » Controls fans with open collector or 0-12 VDC PWM control signal
    • » PWM fan speed control based on:
      • I2C interface (single or dual)
      • Temperature at an on-board or remote thermistor
      • Analog control signal (PWM, 5.0 VDC)
    • » Single or dual I2C interfacecapability:
      • Set PWM fan speed control based on temperature or I2C commands
      • Write fan speed commands (including on/off)
      • Read pass/fail status for each fan
      • Read temperature readings from an on-board thermistor
      • Allow access to EEPROM storage
    • » Monitors open collector or voltage source tach pulses from the fans and provides pass/fail status for each fan through the I2C interface, LED and CMOS outputs.
    • » Compatible with SmartFan Storm and Multi SD for telecom 10-75 VDC dual feed buck regulator applications
    • » Optional individual fan fusing

    Cirrus-9 PWM Fan Control Dimensions

    pwm fan speed control smartfan cirrus 9Cirrus 9 Dimensions

    Cirrus-9 PWM Fan Control Part Numbers

    Part No.* Description
    4WR9C00-F Open Collector PWM Fan Control Signal
    4WR9V00-F 0-12 VDC PWM Fan Control Signal
    H128-F Hardware Pack (Connectors, Terminals, Mounting)

    *When used in the temperature or transducer (5.0 VDC) control mode, a sensor (sold separately) is required.
    Choose an air, surface or liquid temperature sensor or via your own transducer.

    Additional Information

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    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.