Applications
IDEC SmartRelay Manual
235
Components used
•
K1
contactor relay
•
K2
contactor relay
•
S0
(break contact)
STOP pushbutton
•
S1
(make contact)
START pushbutton
•
S2
(make contact)
flow sensor
•
S3
(make 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
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com