The driving force of motor control & electronics cooling. SmartFan Multi SD Speed Control for DC Fans SmartFan Multi SD is a fan speed FEATURES Accepts and diode ORs dual power feeds control and temperature alarm designed Soft start and current limiting at start up for DC fans and blowers. Multi SD Accepts temperature (thermistor) inputs from up to three ORd sensors and accepts and diode ORs dual power feeds provides proportional speed control to the fans in the range from 10 to 75 VDC. It can Compatible with SmartFan TachScan-3 and TachScan-9 speed alarms control 12, 24 or 48 VDC fans and Small size of 1.5 X 5.0 permits mounting in small spaces within fan operates at a high frequency to achieve trays, etc. maximum power efficiency at minimum High power efficiency: typically greater than 90% size. Fan speed control is based on Noise reduction: typically 15 dB(A) or more at idle speed Jumpers allow user selectable settings of: temperature from up to three temperature 12, 24 or 48 VDC operation (maximum output voltage is limited to input sensors. Voltage to the fans is varied using voltage) a current mode buck control circuit. Multi 35, 40 or 45C Control Temperature SD is supplied with an optically isolated 1, 2 or 3 temperature sensors Temperature alarm output through optical isolator or MOS relay temperature alarm, triggered if sensor RoHS (6/6) compliant temperature reaches 10C above control UL Recognized to UL508 and CSA-C22.2, File E100344 temperature or if cooling system power is lost. SPECIFICATIONS 2 Maximum Watts to Fans Supply Voltage Isolated Temperature Part Number Range Alarm Sinking Current 200 Ft/Min Still Air 1 042D440-F 1 mA 10 to 75 VDC 5.0 Amps 4.0 Amps 1 042D440R-F 100 mA H118-F Hardware Pack 1 Temperature sensor required. See sensors page. 2 Air temperature of 55 C or less CONTROL RESOURCES INCORPORATED www.controlresources.com 2013 (02) Page 1 of 7 DC ControlsSmartFan Multi SD Datasheet FEATURES: Input Power: The Multi-SD can accept one or two power PWM based fan control: The voltage applied to the fans sources in the range of 10-75 VDC. If two power supplies can be controlled based on an isolated PWM signal applied are used, they are logically ORd on the Mul-tSi D so that to position T3 on header J8. the operating voltage is equal to the higher of the tw o supplies. The Multi-SD can supply up to 4.0 Amps to the Fan Speed Up Command Input: A non-isolated input at fan load with natural convection or 5.0 Amps to the fan header J5 allows the user to apply a signal thatc ommands load with 200 LFPM of forced convection, at 12, 24 VDC the fans to go to full speed. This command ove-rrides the or 48 VDC. temperature sensor or PWM input signals at header J8. Input Power Fuse: A 7.0 Amp input power fuse iTs emperature Alarm: An isolated alarm output provides provided to protect the MSulDt i- from over-crurent indication of a high temperature condition or a shorted or conditions. open sensor. Temperature alarm output is from an open collector output or MOS relay. Inrush Current: The input power supply connected to the Mult-iSD will see 1 00 microfarads of capacitanceS pecialized Configurations of the Multi-SD through 0 Ohms. The following parameters can be specialized by CRI through software and/or component values changes: Fan Soft Start: At the application of power, the Multi-SD output voltage starts at 0 VDC. Then, over a period of Relationship between sensed temperatures and fan approximately 5 seconds the fan voltage is modulated from voltage 0 VDC to full voltage and then temperature (or PWM) Relationship between PWM control signal and fan based control begins. voltage Temperature alarm trigger point Fan Speed Control: The speed of all fans is varied by Fan turn off below a certain sensed temperature adjusting the voltage applied to the fan(s). Volt age adjustment is accomplished with a current mode, buckC ustomized Configuration of the Multi-SD type control circuit. The fan voltage range is 6.6-13 VDC Contact Control Resources Sales Department for details for 12 VDC fans, 13-25 for 24 VDC fans and 2650 - VDC on custom products. for 48 VDC fans. Agency Approvals Fan Current Limiting: The load regulating circuitry is configured with a 5 Amp active current limit. UL Recognized to UL508 and CSA-C22.2 File E100344 Multiple Control Temperature Settings: Three control temperatures (35, 40C or 45C) are selectabe by jumper. Temperature based fan control: The voltage applied to the fan(s) is determined by the temperature sensor(s) connected to header J8. Single point or multiple point sensing can be accomplished by connecting one to three thermistor sensors to positions T1, T2 and T3. The sensor reading the hottest temperature is used for fan voltage control when more than one sensor is used. CONTROL Page 2 of 7 11 Beaver Brook Road Littleton, MA 01460 TEL: (978) 486-4160 RESOURCES FAX: (978) 486-4772 www.controlresources.com sales controlres.com 2013 (02) INCORPORATED