VSD-1MC-20(40)
Page 5
Using the VSD-1MC-20(40)
With the VSD-1MC-20(40) you can control a variable fan according to a 0-10 Volts or
4-20 mA input signal. Refer to figure 2 for the location of the different switches,
jumpers and selectors of the different module.
Figure 2: Electronic Boards and Component Location
1
.
Minimum Speed Potentiometer
This potentiometer is used to adjust the minimum speed of the fan. This will be
the minimum speed when the input signal is at its minimum value.
2
.
Dip Switches (Input Range Switch and Shutoff 5% Switch)
Dip Switch 1 is used to select the Input Range (ON = 2-10 Volts / 4-20 mA, OFF
= 0-10 Volts / 0-20 mA).
Dip Switch 2 is used to adjust the output behavior when the input is below 5% of
its total range (ON = Shutoff, OFF = Runs continuously at minimum speed).
3
.
Input Type Jumper
This jumper is used to select which input type is used. Two types of input can be
used which are: 0-20 mA (jumper on the 2 left pins) and 0-10 Volts (jumper on
the 2 right pins).
4
.
Voltage Selection Switch
This switch is used to select the input voltage value (115V or 230V).
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