Siemens LOGO! 230 RC - Special Features and Enhancement Options

LOGO! manual
EWA 4NEB 712 6006-02
100
Functional diagram of the LOGO! solution
I
2
Float switch for
drinking water
supply off
Drinking water
supply
Q2
Float switch for
drinking water
supply on
I1
Pressure
switch
I2
Float switch for
run-dry protection off
I4
Float switch for
run-dry protection on
x
T = 20 s x
Pump
Q1
I2
5.6.4 Special features and enhancement options
In the functional diagram you can see how to wire the control system for the
pump and the solenoid valve. Its structure corresponds to that of the circuit
diagram. However, you can also integrate additional functions for specific
applications that, with conventional technology, would require additional
equipment:
S Enabling of the pump at specific times
S Indication of an imminent or existing water shortage
S Indication of malfunctioning
Applications