Nicotra DDMP Series Operating Manual page 15

In figure 18 is shown an example of DDMP performance curve using the Driver with default setting (without
changing the MAX and min speed values into the modbus register number 1 and 2).
In the indicated working point the correct analog voltage signal is 7V, because the Driver automatically
limits the performance in order to make the fan work in a safe operating area (see. Fig.7 at page 8).
Therefore even applying a voltage signal of 10V the speed of the fan doesn't change until the analog signal
goes below 7V.
Fig.18 – Performance curve explanation – Example DDMP 9/9
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Rev. 2 – 10 November2015