15
低水位
3.5.3 The wiring for floater water-level switch mounted on a side
The floater water-level switch mounted on a side is the normally open contact to output
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 “S3” of B503DSL controller and
the high water-level wire is connected the terminal “S4”. If the NC was selected,the parameter
F0.12 should be set as follow:S3=1, S4=1.
Figure 3.12 Low water-level
Figure 3.13 High water-level
Remarks:
When the actual water-level in the reservoir is lower than the horizontal line of low water-level, “S3”
and “S4” will be disconnected from the “COM” as well as controller automatically start the pump. On the
contrary, if the actual water-level is higher than the horizontal line of high water-level, “S3” and “S4” will
be connected to “COM” as well as controller automatically stop the pump to prevent water overflow.
Notice:
1. If only use one detection signal of water-level in the reservoir, “S3” and “S4” must be
connected together by conductor.
2. It is required to modify the wiring of floater switch’s NC or NO according to the parameter
setting (F0.12).
Low water-level
High
water-level
Detector
switch
of high
water-level
Detector
Switch
of low
Water-level
Detector
switch
of high
water-level
Detector
Switch
of low
Water-leve
B503DSL
B503DSL
B503DSL
B503DSL
