Nicotra DDMP Series Operating Manual page 16

Analog signal PARALLEL
It is possible to have two fans running at the same speed by applying the same analog signal.
In figure 19 is shown how to make the connection by using a potentiometer.
If two or more fans are put in the same compartment it is important that they start at the
same time, otherwise the first fan running forces the other to run in backward rotation.
The DDMP fans are able to start with a low backward rotation (speed < 200rpm), but they
stops if the backward rotation is higher.
With the signal parallel this problem can be avoided.
Nicotra||Gebhardt Potentiometer
Nicotra||Gebhardt can supply a dedicated potentiometer: REGPOT code K43138 In figure 20 is shown the
connection diagrams (with stop function o without).
th
Rev. 2 – 10 November2015
Fig.19 – SPEED CONTROL - PARALLEL Connection
Fig.20 – Nicotra||Gebhardt potentiometer -REGPOT
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