LOGO! Manual
A5E00067781 01
164
The circuit diagram for the previous solution is as follows:
K1
K5
K5
S1
Stale air
Fresh air
S0
K3
K2
Operation
Auxiliary circuit
L1
N
S2
K1
v>
S2
H1
K4
S3v>
K5
Fault
H2
K2
K4
The fans are monitored by flow sensors. If, after a short
delay, no air flow is registered, the system is switched off
and a fault reported. Acknowledge this by pressing the stop
switch.
Monitoring the fans requires an analyzer circuit with several
switching devices in addition to the flow sensors. The ana-
lyzer circuit can be replaced by a single LOGO! module.
Wiring of the ventilation system with LOGO! 230RC
L1 N
I1 I2 I3 I4 I5 I6
Q1
Q2
Q3
Q4
SIEMENS
K1
K2
Exhaust fan
Fresh-air fan
S1
L1
N
S2
S3 v>
v>
H1
H2
S0
LOGO!
230RC
Applications