Able to drive 4-wire DC fans and blowers, Control Resources’ SmartFan Cirrus-6 fan speed controller accepts commands from a custom or an I2C interface. The controller handles tach pulses from 6, 12, 24, or 48 VDC fans with open-collector or 0- to 12-VDC control signal requirements. The device provides fan speed commands with temperature or analog control signals (PWM, 5 VDC) and individual pass/fail fan status. Features include EEPROM storage and an on-board thermistor. Pricing is $65.60.
Control Resources Incorporated