Danfoss VLT AutomationDrive FC 300 Design Manual page 37

FC 300 Design Guide
In a ventilation system, the temperature is to be
settable from - 5 - 35°C with a potentiometer of 0-10
Volt. The set temperature must be kept constant,
for which purpose the Process Control is to be used.
The control is of the inverse type, which means that
when the temperature increases, the ventilation
speed is increased as well, so as to generate more
air. When the temperature drops, the speed is
reduced. The transmitter used is a temperature
sensor with a working range of -10-40°C, 4-20
mA. Min. / Max. speed 300 / 1500 RPM.
NB!:
The example shows a two-wire transmitter.
Start/Stop via switch connected to terminal 18.
1.
Temperature reference via potentiometer (-5-35°C, 0-10 VDC) connected to terminal 53.
2.
3. Temperature feedback via transmitter (-10-40°C, 4-20 mA) connected to terminal
54. Switch S202 set to ON (current input).
Introduction to FC 300
MG.33.B4.02 - VLT is a registered Danfoss trademark
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