Special Features And Enhancement Options - Siemens LOGO! Series Manual

Applications
Functional diagram of the LOGO! solution
Float switch for
I4
run-dry protection on
Float switch for
run-dry protection off
Float switch for
drinking water
supply on

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
100
Pressure
I1
switch
x
T = 20 s
I2
I2
Float switch for
drinking water
supply off
Pump
x Q1
Drinking water
supply
Q2
I
2
EWA 4NEB 712 6006-02
LOGO! manual