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FLOAT OPERATION
SINGLE FLOAT SYSTEM
Basic level control can be accomplished using a float device that contains a contact closure internally.
For applications that do not have critical start and stop points and do not involve turbulence, such as a
pond or lagoon, a single float can provide adequate control over water levels. Assign a digital input to
the High Float function and select normally open or closed. These floats are typically configured as
normally open, meaning the internal float contact will be open when you want the pump to stop, and
closed when you want the pump to start. One wire from the float contact must connect to the
assigned digital input on the panel and the other must be connected to a common ground. A
common ground connection is available at the control panel.
DUAL FLOAT SYSTEM
A more precise level control can be accomplished using two floats. One float is installed at the low-
level limit and the other float is installed at the high-level limit. This dual float system is desirable when
there are more stringent requirements on level control, particularly in narrow tanks or turbulent fluids.
Assign one digital input to High Float and another the Low Float functions and select the contact type.
Typically, these are configured as normally open. See above. As the level rises, the low float contact
will close. Once the level rises high enough for the high float to close, the pump will start. As the
liquid is pumped down, the high float will open, and the pump will continue to run until the liquid is
low enough for the low float to drop open. Once this occurs, the pump will begin to shut down. Like
the single float, each float must have one wire connected to the assigned digital input and the other to
common ground. A common ground connection is available at the control panel.
