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SmartFan® Nimbus Manual
Remote Powered Transducer 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 REMOTE POWERED TRANSDUCER MODE |
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When used in the remote transducer mode, the Nimbus can power and control from most 0-5VDC transducers (humidity, pressure, flow etc.) with a maximum supply current of 5mA. To set the Nimbus to remote transducer mode, see table 2.
Setting Control Parameters (switch #3,4,5,6)
To customize the control slope to your transducer, use DIP switches 3 & 4 to set idle or minimum speed voltage, use switches 5 & 6 to set full speed control voltage. See table 6, and figure 8 for details.
| Table 6: Setting Transducer Control Parameters |
| DIP Switch |
VDC (min) |
Dip switch |
VDC (max) |
| 3 |
4 |
5 |
6 |
| OFF |
OFF |
0.5 |
OFF |
OFF |
3.0 |
| ON |
OFF |
1.0 |
ON |
OFF |
3.5 |
| OFF |
ON |
1.5 |
OFF |
ON |
4.0 |
| ON |
ON |
2.0 |
ON |
ON |
4.5 |
Figure
8
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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. See figure 8.
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, see table #3. The default setting is at 50%. Other idle speeds can be supplied, contact customer service for details. See figure 8. |
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Remote Powered Transducer Connections |
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When used in the remote transducer mode, the Nimbus can power and control from any 0-5VDC transducer (humidity, pressure, flow etc.) with a maximum supply current of 5mA. Connect the + lead to SRTN, connect – to S1, connect Vout to S2.
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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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