165
LOGO! Manual
A5E00067781 01
Components used
K1
Master contactor
K2
Master contactor
S0
(NC contact)
Stop switch
S1
(NO contact)
Start switch
S2
(NO contact)
Flow sensor
S3
(NO contact)
Flow sensor
H1
Indicator lamp
H2
Indicator lamp
Block diagram of the LOGO! solution
The block diagram of the ventilation control system with
LOGO! is as follows:
x
I1
On
Q3
Fault
I2
Off
Q1
Exhaust
fan
Q2
Fresh-air
fan
Q1
Extractor fan
I3
Exhaust air
flow sensor
x
I2
Off
Fault
x
T=
10 s
x
T= 10 s
x
x
x
I3
Exhaust air flow
sensor
I4
Fresh-air flow
sensor
Extractor fan
Q1
Extractor fan
Q2
Q3
Applications