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Thermal
Management Alarms and Controllers
| OMNI
SD Speed control for DC |
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OMNI
SD Speed control for DC fans
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Click
on drawing to view large scale version
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| SmartFan
Omni SD is a versatile switching DC control which operates
at a high-frequency to achieve maximum power efficiency at minimum
size. Units are available for nominal 12, 24 and 48 VDC operation.
Omni SD controllers apply a smooth DC voltage to the air mover
for absolute minimum noise. They are compatible with temperature
sensors P1 through P9 shown on the Sensors page. Control Temperature
is set by means of a jumper on the circuit board. Omni 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. |
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Features
- Choose 12, 24,
or 48 VDC nominal voltage ratings
- High power efficiency:
typically greater than 90%
- Noise reduction:
typically 15 dB(A) or more at idle speed
- Constant idle
voltage regardless of input voltage
- Optically isolated
temperature alarm output sinks up to 1.0 mA (normally closed)
- Selectable Control
Temperatures of 35°, 40°, or 45°C (74°, 80°, or 86°C when
P3 sensor is used)
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| SPECIFICATIONS |
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Part
Number
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Supply
Voltage Range
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Maximum
Watts to Fans (1)
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200
ft/min
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Still
Air
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012D440
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10-15VDC
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60
Watts/5.0 Amps
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48
Watts/4.0 Amps
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024D440
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20-30
VDC
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120
Watts/5.0 Amps
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96
Watts/4.0 Amps
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048D440
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42-58
VDC
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240 Watts/5.0 Amps
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192
Watts/4.0 Amps
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H104
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Hardware
Pack
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| (1)
Air Temperature of 55°C or less. ; U.S. Patents 4,659,920, 4,722,699
and 5,364,026 |
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| INSTALLATION |
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| Mounting |
| To minimize
EMI, mount the unit on a grounded surface using a metal spacer
at the mounting hole that is surrounded by a conductive pad.
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| Sensor
Selection |
| There
is no polarity consideration when connecting the sensor. Click
here to view Sensors
page. |
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| CONNECTIONS |
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Figure
1
Wiring Diagram Click on drawing
to view large scale version |
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