Applications
278
IDEC SmartRelay Manual
Components used
•
K1
contactor relay
•
K2
contactor relay
•
S0
(normally closed contact)
STOP pushbutton
•
S1
(normally open contact)
START pushbutton
•
S2
(normally open contact)
flow sensor
•
S3
(normally open contact)
flow sensor
•
H1
signal lamp
•
H2
signal lamp
Block diagram of the IDEC SmartRelay solution
The block diagram of the air-conditioning system with IDEC
SmartRelay :
x
I1
Q3
I2
Q1
Q2
Q1
I3
x
I2
x
T=
10 s
x
T= 10 s
x
x
x
I3
I4
Q1
Q2
Q3
Exhaust
fan
On
Error
Off
Exhaust fan
Exhaust air
flow sensor
Fresh-air
flow sensor
Fresh-air fan
Exhaust fan
Exhaust air
flow sensor
Fresh-air
fan
Error
Off
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