PWM Fan Tray Controller, SmartFan® Cirrus-6

  • PWM Fan Control for up to Six 4 wire DC Fans or Blowers

  •    Temperature or I2C control options
  •    Easy setup via Navigator Programmer or I2C bus
  •    Factory customization for orders as low as 50 Pieces
Operation / Installation PDF

Cirrus-6 Datasheet

SmartFan® Cirrus-6 is a CE certified programmable fan tray controller designed to monitor and manage up to six 12, 24 or 48 VDC PWM 4 wire fans or blowers.  The Cirrus-6 fan tray controller can be programmed using the Navigator PRG00-F handheld remote programmer or with an I2C interface.  When programming with the Navigator, one can customize a temperature control curve, temperature alarm trigger, low speed alarm trigger, fail-safe modes and more.  When programming using an I2C interface, one has the same control programming options listed above plus the ability to control and monitor fans via the I2C interface.  Factory customization available for orders as low as 50 pieces.

For tips on integrating I2C for fan tray control, check out I2C Design Tips.  For other off-the-shelf DC fan controls visit SmartFan® DC.  As no product line can anticipate all applications, Control Resources also specializes in design and manufacture of custom controls.

Specifications Features / Selectable Options
  • » Power Source: 10-60 VDC, single or dual feed diode OR’d
  • » Extended Voltage Ratings: Up to 76 VDC can be achieved with the SmartFan® Multi SD or Storm regulator
  • » Total Fan Current: Up to 12 Amps (single power feed only), 2.5 Amps max per fan
  • » Compatible Fans: Up to six 12, 24 or 48 VDC, 4-wire fans (open collector PWM or 0-12 VDC PWM control)
  • » On-board 3.3 / 5.0 VDC isolated power for I2C and other control signals
  • » Operating Environment: -20°C to 60°C,  RH 95% non-condensing
  • » Storage Temperature: -40°C to 125°C
  • » Control temperature accuracy and hysteresis: ±2°C
  • » Weight: 1.9 oz (53 grams)
  • » RoHS (6/6) compliant
  • » Control Signals & Programming Modes (Off-the-Shelf)
    • – I2C interface (single or dual) used to control speed or set up temperature control parameters
    • – Temperature control parameters can be programmed using the Navigator programmer PRG00-F (rented or sold separately)
  • » Status and Alarm reporting
    • – Fan speed, temperature and alarm conditions are programmable through I2C interface and reported through I2C, LED or MOS relay connections
    • – Temperature alarms and fan speed alarms are programmable with Navigator remote programmer and reported through LED or MOS relay
  • » Factory programming available for orders as low as 50 pcs.
  • » UL Recognized to UL508 and CSA-C22.2, File E100344
  • » CE certified product available June 2017.  Contact CRI at or (978) 486-4160 for details.


Cirrus-6 PWM Fan Controller Dimensions

Cirrus-6 Dimensions

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

Cirrus-6 PWM Fan Tray Controller Part Numbers

Part Number Total Fan Current / Power Feeds Control Options
4WR6C00-F 6 Amps / Single or Dual Open Collector PWM Fan Control Signal
4WR6V00-F 6 Amps / Single or Dual 0-12 VDC PWM Fan Control Signal
4WR12C00-F 12 Amps / Single Open Collector PWM Fan Control Signal
4WR12V00-F 12 Amps / Single 0-12 VDC PWM Fan Control Signal
PRG00-F Navigator remote programmer available for rent or purchase. Required to program controller when no I2C capabilities are available.
H125-F Hardware Pack (Connectors, Terminals, Mounting)
Remote Temperature Sensors Remote temperature sensors sold separately

Additional Information

» Cirrus-6 Operation / Installation Datasheet (PDF)
» Navigator Remote Programmer Datasheet (PDF)
» Cirrus-6 IGS CAD drawing (.igs)
» 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.