2.1
Speed setting / adjustment
By using a potentiometer P3 and P4, the adjustment range of the speed is limited
internally.
P3 = minimum speed, supply turn to left stop = 20%
P4 = maximum speeed, supply turn to right stop = 100%
As a result of factory settings the entire range of the control spectrum is available.
If potentiometer P4 is set lower than potentiometer P3, the fan runs constantly with
the value set at potentiometer P3.
2.2
Scaling
The scaling can be adjusted via the potentiometer P1 and P2, ie. it will set the
allocation setpoint input (0-10 V=) for speed control (20-100%).
Implication:
With a setpoint of 1V control with 20% of the speed starts processing work, wherein
the setpoint of 10 V, the controller will reach the maximum value of 100%. Thus, in
the delivery state, complete bandwidth set is available for both - setpoint input and
speed control. This corresponds to 0 V - 10 V at the setpoint input of motor control of
20-100%.
In a standard control in principle no amendment has to be done with a potentiometer.
An amendment can take place, for example, when connecting a sensor sense when
a lower control range is used.
Example
:
A temperature sensor has a measuring range of 0-40°C and supplies 0-10 V. The
fan is to be controlled in a range of 20°C to 34°C (fig 15). Accordingly, a control
range produces 5-8V. Potentiometer 1 is set to 5V, potentiometers 2 to 8V. (fig 16)
shows the resulting fan control.
Fig 15
Fig 16
TFT Measuring range 0-40
⁰
C
An
a
lo
g
u
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o
u
tp
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t 0
-10V
F
a
n
c
o
n
tr
o
l
Scaling range in V
