PDS33 Series
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3.2.7 Water tank level float wiring (optional)
Use a floating ball switch to prevent reservoir overflow is recommended. When the
reservoir is full, the pump will stop; when the water level is lower than the low
level, the pump will be restarted. It can prevent the overflow, limit the unnecessary
pump wear. The PDS33 controller allows the use of small signal line to connect to
remote float switch, even if the position of the reservoir is far away.
Figure 9 Floating Ball Diagram
Floating ball switch request:
1. The minimum requirements for 1 mm² line diameter, the distance up to
50
m
2. I f the application is in a long distance transmission, the need to use the shielded
wire. The end of the shielding layer close to the controller needs to be grounded,
the end close to the floating ball switch; the end close to the float switch is not
required to be grounded.
Figure 10 Float ball wiring diagram
position
pump off
p osition
p um p on
pumping
range
cable
weight
sealed
cable clamp
D
I
6
C
O
M
Remote
signal of
float
switch
Float
switch
N0
COM
If the cable is sh ielded，just connec t to ground
