SmartFan® Multi SD DC Fan Speed Controller and Alarm
Operation / Installation PDF
SmartFan® Multi SD fan speed controller is designed for controlling 2 wire DC fans and blowers in electronics cooling applications. Fan speed control is based on sensing temperature from up to 3 OR’d sensors and varying fan voltage using a current mode buck control circuit. Multi SD accepts single or dual 10-75 VDC power feeds to control 12, 24 or 48 VDC fans at a high frequency achieving maximum power efficiency in a minimum package size. Customer selectable parameters include; fan voltage, control temperature and 1, 2 or 3 temperature sensors. All Multi SD fan speed controllers are supplied with an optically isolated temperature alarm triggered if a sensor reaches 10°C above the selected control temperature or if cooling system power is lost. By adding a compatible SmartFan®TachScan 3 or TachScan 9 fan speed alarm, one can also control and monitor up to nine 3 wire fans (DC fans equipped with tach pulse 3rd wire).
Contact Control Resources customer service to ask about modifying the Multi SD for your application or for designing custom products from the ground up to meet your specification. Factory customization is available for orders as low as 50 pieces.
SmartFan Multi SD Fan Control & Alarm Dimensions and Connections
For CAD drawings, use the links in Additional Information below.
SmartFan Multi SD Fan Control & Alarm Part Numbers
|Part Number||Supply Voltage Range||Maximum Wattage at 55°C||Isolated Temperature
Alarm Sinking Current
|200 Ft/Min||Still Air|
|042D440-F1||10 to 75 VDC||240 Watts/5.0 Amps||192 Watts/4.0 Amps||1 mA|
1. Temperature sensor required. See sensors page.
To talk to an Engineer or Service Representative, call (978) 486-4160 (9:00 AM – 5:00 PM EST)