Varifan Variable speed controllers
VSD-1MC and VSD-1C controllers use a 0 to 10 V or 4 to 20 mA input signal to control the speed of variable speed fans.
Varifan VSD-1C: Variable speed module with a maximum load of 15A
Varifan VSD-1MC: Variable speed module with a manual speed selector and a maximum load of 15A
The faceplate of the VSD-1MC series of controllers is designed with a toggle switch and a manual speed selector dial.The toggle switch allows you to select between manual and automatic modes. In manual mode, you set the fan speed by turning the manual speed selector dial to the desired value. Possible settings range from OFF to 10. In automatic mode, the VSD-1MC responds to the input signal.