SmartFan®Nimbus Manual
Current or Voltage 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 CURRENT OR VOLTAGE CONTROL MODE
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 | |
| 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 6
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.
