13
Notice : if only use one detection signal of water-level in the wells, “S1” and “S2”
must be connected together by conductor.
3.5.2 The wiring of reservoir
3.5.2.1 The wiring for floater water-level switch connected by cable
The common port, which using floater water-level switch connected by cable, is fed to the terminal
“COM” of B503DSL controller. And then, select NC and connect to “S3” (“S3”and “S4” connected
together ). If the NO was connected to “S3”, the parameter “F0.12 ”should be set as follow: S3=1, S4=1.
Figure 3.8 Low water-level
Figure 3.9 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.
3.5.2.2 The wiring for floater water-level switch connected by rod
The floater water-level switch connected by rod 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.
Low water-level
High water-level
