LOGO! manual
EWA 4NEB 712 6006-02
86
The ventilators are controlled by flow monitors. If no air flow is detected
after a short waiting time has elapsed, the system is switched off and a fault
is reported. You acknowledge this by pressing the stop switch.
In addition to the flow monitors, the ventilation monitoring system requires
an evaluation circuit with a number of switching devices. The evaluation
circuit can be replaced by a single LOGO! module.
Wiring of the ventilation system with LOGO! 230RC
L1N I1 I2 I3 I4 I5 I6
Q1 Q2 Q3 Q4
SIEMENS
K1 K2
S1
L1
N
S2 S3
v>
v>
H1 H2
S0
LOGO! 230RC
Exhaust ventilator Fresh air ventilator
Components used
S K1 Master contactor
S K2 Master contactor
S S0 Stop switch
S S1 Start switch
S S2 Flow monitor
S S3 Flow monitor
S H1 Warning light
S H2 Warning light
Applications
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