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SmartFan® Nimbus Manual
Current or Voltage Control Mode
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SETTING CONTROL MODES (switches #7, 8) |
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Unless otherwise specified, the Nimbus is factory set to control fans in the Temperature Control mode. To control via a current or voltage source, remote powered transducer or fixed speed setting, set switches 7 and 8 as shown below, then refer to the control mode section you have selected to customize the Nimbus for your application.
| Table 2: Setting Control Modes |
| Control Via |
Dip switch |
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7 |
8 |
| Current or Voltage |
ON |
OFF |
| Remote Powered Transducer |
OFF |
ON |
| Temperature |
OFF |
OFF |
| Fixed Speed |
ON |
ON |
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USING CURRENT OR VOLTAGE CONTROL MODE |
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Unless otherwise specified, the Nimbus is factory set to control fans in the “Temperature Control” mode. To switch to controlling fan speed via a “Control Signal”, refer to table 2. Select the type of control signal you are using [I for 0-20mA (30mA Max.) or V for 0-10VDC (12VDC max.)] using the jumper on header J1. The Nimbus can also be customized to accept other control schemes, contact customer service for details.
Setting Idle Speed (switch #2,3)
The idle speed is the minimum voltage (as a % of supply voltage) supplied to the fan. The Nimbus is factory set for idle speeds of 30, 40, 50 and 60% by setting DIP switches 2 and 3. The default idle setting is 50%. Other idle speeds can be supplied, contact customer service for details.
| Table 3: Idle Speed DIP Switch Settings |
| % of Supply Voltage |
Dip switch |
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2 |
3 |
| 30% |
ON |
OFF |
| 40% |
OFF |
ON |
| 50% |
OFF |
OFF |
| 60% |
ON |
ON |
Fan On / Fan Off Feature (switch #1)
To turn fan(s) off below the set idle speed (see table 3), set switch #1 to the ON position. To keep fans running at idle speed below the set idle speed, set switch #1 to the OFF position.
Control Signal Loss Options (switch #6)
If the control signal is lost, (less than 4mA in I mode, less than 2VDC in V mode) when switch 6 is OFF fans will continue to idle or remain off. To send fans to full speed if the control signal is lost (less than 4mA in I mode, less than 2VDC in V mode) set switch 6 to the ON position.
Figure
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Use the links below for addtional manual pages or for a complete manual (9 pages), click on the Operation/Installation Manual PDF link above.
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