LOGO! Manual
A5E00067781 01
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Block diagram of the LOGO! solution
I2
Float switch for
mains water inlet off
Mains water inlet
Q2
Float switch for mains water inlet off
I1
Pressure switch
I3
Float switch for run-
dry protection on
I4
Float switch for run-
dry protection off
x
T = 20 s x
Pump
Q1
I3
8.7.4 Special Features and Enhancement Options
The function diagram shows how you can connect up the
control system for the pump and the solenoid valve. Its lay-
out corresponds to that of the current flow diagram. You
also have the possibility of incorporating additional func-
tions for specific applications that would only be possible
with the inclusion of extra equipment if you were using con-
ventional technology, e.g.:
Enabling the pump at specific times
Indication of imminent or existing shortage of water
Reporting of system faults
Applications
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