SmartFan® Multi-SR
Digital Fan Speed Control and Alarm
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SmartFan Multi-SR Digital Fan Speed Control and Alarm |
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SmartFan Multi SR is a digital fan speed control and alarm that offers an off-the-shelf OEM control cooling solution for telecommunications applications. Multi SR accepts and diode ORs dual power feeds in the range from 36 to 75 VDC. Multi SR fan speed control can control to up to six 24 or 48 VDC fans and operates at a high frequency to achieve maximum power efficiency at minimum size. Fan speed control can be based on temperature, control signal (PWM, DC) or I2C bus. Voltage to the fans is varied using a common mode buck/boost control circuit. |
Multi SR monitors tach pulses from the fans and provides OR'd outputs to drive LED, logic and audible alarms. Communication of cooling system status is provided via an I2C bus. Designed with versatility in mind, Multi SR's digital fan speed control and alarm parameters can be modified via on-board jumpers and FLASH microcontroller programming.
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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Product Features - SmartFan Multi-SR Digital Fan Speed Control and Alarm |
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- Accepts
and diode ORs dual power feeds in the
range from 36 to 75 VDC
- Maximum
fan current is 4.0 Amps (still air) and
5.0 Amps (200 ft/min air stream) at 55°C
- Includes
soft start and current limiting at start up
- Supplies
voltage to up to six 24 VDC or
48 VDC fans
- Maximum
voltage applied to fans is regulated
at 25 VDC for 24 volt fans and 50 VDC for
48 volt fans
- When
used with 48 VDC fans, a boost circuit is
included that provides voltages greater than
the
supply voltage when the supply voltage drops
below 48 VDC
- Monitors
open collector or voltage source tach
pulses from the fans and provides OR'd
outputs
to drive LED, logic and audible alarms
- Additional
alarm outputs are provided for
multiple failure conditions, over temperature
conditions, sensor failure, microcontroller
failure
and loss of power to the Multi SR
- Provides
communication of cooling system status
via an I2C bus
- Narrow
1.50" width of the board allows for
mounting in fan trays as thin as 1U (1.75")
high
- Agency
approvals
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Selectable Options - SmartFan Multi-SR Digital Fan Speed Control and Alarm |
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- Jumpers allow user selectable settings of:
- Control Temperature
- Fan Alarm Trigger Speed
- 24 or 48 VDC Operation
- Isolated On-Board Power for I2C
- Accepts
temperature (thermistor) inputs from up
to three OR'd sensors and provides proportional
fan speed control to the fans
- Fan speed
control can also be based on accepting
control signals (PWM, DC) or via an I2C bus
- Sensors
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Part Numbering System - SmartFan Multi-SR Digital Fan Speed Control and Alarm |
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| Part No1 |
Supply Voltage Range |
Maximum Watts to Fans2
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Number of Fans |
Number of Temperature Sensors |
Speed Control Method |
Isolated 3.3/5.0 VDC Power |
| 200 Ft/Min |
Still Air |
| 052S4401T06 |
36 to 75 VDC |
240 Watts/5.0 Amps |
192 Watts/5.0 Amps |
6 |
1 Remote |
Temperature Based |
None Supplied |
| 052S4401T16 |
Supplied On-Board |
| H117 |
Hardware Pack |
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1. For additional part number options, see table 1 in the Multi-SR Installation & Operation Manual in PDF.
2. Air temperature of 55°C or less. See Derating Curve page for derating above 55°C.
| Stock
Product |
052S4401T06
052S4401T16 |
U.S.
Patents 4,659,290, 4,722,699 and 5,364,026
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