SmartFan®Nimbus Manual
Remote Powered Transducer Control Mode
SETTING CONTROL MODES (switches #7, 8)
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 | |
| 7 | 8 | |
| Current or Voltage | ON | OFF |
| Remote Powered Transducer | OFF | ON |
| Temperature | OFF | OFF |
| Fixed Speed | ON | ON |
USING REMOTE POWERED TRANSDUCER MODE
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
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.
Remote Powered Transducer Connections
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.
ADDITIONAL MANUAL PAGESOperation/Installation Manual
Use the links below for addtional manual pages or for a complete manual (9 pages), click on the Operation/Installation Manual PDF link above.
