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VSD-1C 

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The VSD-1C module uses a 0-10 Volts or a 4-20 mA signal to make a fan modulate. 
User  can  adjust the fan Minimum  Speed  with  the  potentiometer  located inside  the 
module  box  on  the  electronic  board  (refer  to  figure  2).  That  Minimum  Speed 
potentiometer is used to adjust the speed when the input is at its lowest value. 

User can also set how the fan will operates when the input signal is at or below 5% 
of its total range. Refer to the logic diagrams at figure 3 to know the exact values and 
behavior of the different switches configurations. The fan can either continue to run 
at Minimum Speed (Shutoff 5% set to OFF) when the input has reach its minimum 
value or can stop when the input reach 5% of its total range (Shutoff 5% set to ON). 
With  the  Shutoff  at  5%  switch  set  to  ON,  a  differential  is  applied  in  order  to  avoid 
equipment wear. Refer to figure 3 for the exact value of the differential. Also refer to 
figure 2 for the location of the Shutoff 5% switch. 

Another switch also located on the electronic board will select if the input is a 0-10 
Volts (0-20 mA) or a 2-10 Volts (4-20 mA) signal. Refer to figure 2 for the location of 
the Input Range switch. 

Finally, a jumper (JP1) must be set to determine the Input Type used. Two types are 
available  which are: 0-10 Volts (jumper on the 2 left pins) and 0-20 mA (jumper on 
the 2 right pins). Refer to figure 2 for the location of the Input Type jumper. 

Here is a description of the VSD-1C operation: 

If the Shutoff 5% switch is set to OFF, the fan will run continuously at its 
Minimum Speed when the input reads it lowest value. If the Shutoff 5% switch 
is set to ON, the fan will stop when the input is at or below 5% of its total range. A 
differential is applied to the 5% value. Refer to figure 3 for the exact value of the 
differential. 

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If the input reads above its minimum value (or 5% if the Shutoff 5% switch is set 
to ON), the fan will modulate from its Minimum Speed to 100% of its maximum 
speed. The full speed will be reached when the input reads 10 Volts or 20 mA. 

 

 

Summary of Contents for VSD-1C

Page 1: ...VSD 1C MANUAL 0 10V 4 20mA Variable Speed Module Installation User s Guide Varifan...

Page 2: ...dule operates on 115 230V and 50 60Hz The VSD 1C comes in a PVC non corrosive enclosure that is protected from dust and humidity The VSD 1C is covered by a complete two year warranty Unpacking Unpack...

Page 3: ...tified as FAN as shown in figure 1 4 Connect the power source to the 2 black terminal block identified as LINE as shown in figure 1 5 Set the JP1 jumper refer to figure 2 for the location of the jumpe...

Page 4: ...oid electric shock disconnect power source prior to installation or troubleshooting Make sure that the voltage selector switch is set to the correct voltage before powering up the module 0 10 Volts or...

Page 5: ...er 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 t...

Page 6: ...o refer to figure 2 for the location of the Shutoff 5 switch Another switch also located on the electronic board will select if the input is a 0 10 Volts 0 20 mA or a 2 10 Volts 4 20 mA signal Refer t...

Page 7: ...1 OFF 0 10 Volts or 0 20 mA Switch 2 OFF No shutoff at 5 Fan Speed 100 Minimum Speed 10 Volts or 20 mA Input 0 Switch 1 ON 2 10 Volts or 4 20 mA Switch 2 OFF No shutoff at 5 Fan Speed 100 Minimum Spe...

Page 8: ...ON Shutoff at 5 Fan Speed 100 Minimum Speed 10 Volts or 20 mA Input 0 0 7 Volts or 1 4 mA 0 5 Volts or 1 mA Switch 1 ON 2 10 Volts or 4 20 mA Switch 2 ON Shutoff at 5 Fan Speed 100 Minimum Speed 10 Vo...

Page 9: ...ection index IP 66 Warranty 2 years POWER SUPPLY Operational voltage range SW1 115V 92 to 125 VAC Operational voltage range SW1 230V 184 to 250 VAC Operational frequency range 45 to 65 Hz INPUT Input...

Page 10: ...od flood fire hail or any other natural disaster Any unauthorized work modification or repair on this product automatically voids the warranty and disclaims the manufacturer from all responsibility Th...

Page 11: ...VSD 1C VER 2 0 October 20 2014...

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