Ofs Softening Control, Инструкция по эксплуатации, Страница: 14 / 28

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9.3.5 Connection external closer for activation of measurement
Instead of a water meter an external closer can be connected at terminal 23 and 24. Measure-
ments will be carried out as long as the contact is closed. In contrast to the use of the ON/OFF
contact the measurements starts immediately with soft water samples.
The sensor quality will be determined automatically, even if measurements are not activated.
Therefore raw and soft water pressure should be present at the sampling point.
9.3.6 Connection of water meter
For a continuous monitoring during the soft water sampling and to avoid threshold value ex-
ceeding alarm caused of the so-called „hardness breakthrough“ it is recommend to monitor
the soft water sampling not within fixed time distances. Therefore it is possible to connect a
mechanical or electrical water meter to the device.
9.3.6.1 Connection mechanical water meter
The water meter to be connected must be equipped with potential free contacts. The electrical
connection is to realize at terminals 23 and 24 of the controller card. If the measurement
should be activated by a potential free closer, it has to be connected at the same terminals (23
and 24).
9.3.6.2 Connection electronic water meter (turbine with Hall-contacts)
The electronic water meter is to connect at the terminal 24, 25 and 26 of the controller card.
Attention should be paid to the correct polarity.
Terminal 25 + VCC
Terminal 24
GND
Terminal 26 Impulses