VSD-1C
Page 5
Using the VSD-1C
With the VSD-1C 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 module.
Figure 2: Electronic Board and Component Location
15A/250V
230V
FAN
LINE
115/230V
INPUT
1341 B
-
+
ON
OFF
1 2
MIN. SPEED
-
+
0-20mA
0-10V
JP1
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 and Shutoff 5%)
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: 0-10 Volts (jumper on the 2 left pins) and 0-20 mA (jumper on
the 2 right pins).
[
2
]
[
1
]
[
3
]
