12
and its common wire is connected to the terminal “COM” of B503DSL controller. At the same
time, the low level-water wire is connected to the terminal “S1” of B503DSL controller and
the high water-level wire is connected the terminal “S2”. If the NC was selected, the parameter
F0.12 should be set as follow:S1=1, S2=1.
Figure 3.6 Low water-level
Figure 3.7 High water-level
Remarks:
When the actual water-level in the wells is higher than the horizontal line of high
water-level, “S1” and “S2” will be connected to the “COM” as well as controller automatically
start the pump.On the contrary, if the actual water-level is lower than the horizontal line of low
water-level, “S1” and “S2” will be disconnected from “COM” as well as controller
automatically stop the pump to prevent anhydrous idling.
3.5.1.3 The wiring for water-level sensors
There are three signal leads as given (left image)for
detecting water-level. The shortest signal line is
①
, which is
corresponding to the horizontal line of high water-level, is
connected to the terminal “S2” of controller. The signal line
②
that is corresponding to the horizontal line of low water- level
need to be connected to the terminal “S1”. The longest line is
③
, which is corresponding to the common port is connected to
the terminal “COM” of controller.
Remarks:
When the actual water-level in the wells is higher than the
horizontal line of high water-level, “S1” and “S2” will be connected to the “COM” as well as
controller automatically start the pump. On the contrary, if the actual water-level is lower than
the horizontal line of low water-level, “S1” and “S2” will be disconnected from “COM” as
well as controller automatically stop the pump to prevent anhydrous idling.
Low water-level
High water-level
High
water-level
Low
water-level
