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CRI
Catalog and Design Guide Section |
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| Multi
SD Fan Speed Control and Temperature Alarm |
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SmartFan
Multi SD is a new generation fan speed control and temperature alarm cooling solution designed for DC fans and blowers. Multi SD fan control accepts and diode ORs dual power feeds in the range from 10 to 75 VDC. This OEM control cooling solution can control 12, 24 or 48 VDC fans and operates at a high frequency to achieve maximum power efficiency at minimum size. Fan speed control is based on temperature at up to three temperature sensors. Voltage to the fans is varied using a common mode buck control circuit. |
| Multi SD is supplied with an optically isolated temperature alarm, triggered if sensor temperature reaches 10°C above control temperature or if cooling system power is lost.
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 control applications.
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For Application, Design and
Custom Control Information See: |
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| Sensors |
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| Features |
- High
power efficiency: typically greater than 90%
- Noise
reduction: typically 15 dB(A) or more at idle speed
- Jumpers
allow user selectable settings of:
- 12,
24 or 48 VDC operation (maximum output is limited to input voltage)
- 35, 40 or 45°C Control Temperature
- 1, 2 or 3 temperature sensors
- Temperature
alarm output through optical isolator or MOS relay
- Accepts
and diode ORs dual power feeds
- Soft
start and current limiting at start up
- Accepts
temperature (thermistor) inputs from up
to three OR'd sensors and provides proportional
speed control to the fans
- Compatible
with SmartFan TachScan-3 and
TachScan-9 fan speed alarms
- Small
size of 1.5" X 5.0" permits mounting in
small spaces with in fan trays, etc.
- Agency
approvals
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| Specifications |
| Part No. |
Supply
Voltage Range |
Maximum
Watts to Fans1 |
Isolated
Temperature Alarm Sinking Current |
| 200
ft-Min |
Still
Air |
| 042D440 |
10
to 75 VDC |
240
Watts/
5.0 Amps |
192
Watts/
4.0 Amps |
1
mA |
| 042D440R |
100
mA |
| H118 |
Hardware
Pack |
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1Air
temperature of 55°C or less. See
Derating
Curves page for derating above 55°C.
U.S. Patents 4,659,290, 4,722,699 and 5,364,026
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Control Resources Incorporated
11 Beaver Brook Road
Littleton MA, 01460 USA
Tel: 978-486-4160
Fax: 978-486-4772
email: sales@controlres.com
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