Advantages Of Using Idec Smartrelay - IDEC FL1E-H12RCA User Manual

8.3.2

Advantages of using IDEC SmartRelay

The IDEC SmartRelay solution requires less switchgear.
That saves you installation time and space in the control
cabinet. You might even be able to use a smaller switching
cabinet.
Additional IDEC SmartRelay options
• The free output (Q4) can be used as isolated signal
contact for reporting faults or power failure.
• It is possible to switch off of the fans by means of a
sequential circuit.
These functions can be implemented without additional
switchgear.
Block diagram of the extended IDEC SmartRelay solution
The fans at Q1 and Q2 are switched on and off by means of
the following circuit:
On
I1
Fault
I2
Off
Exhaust air
flow sensor
Q1 exhaust fan
Exhaust air
flow sensor
I3
Fresh-air fan
Q2
Fresh-air flow
sensor
I4
IDEC SmartRelay Manual
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
Q3
x
I3
x
x
T=
30 s
x
T=
10 s
T=
10 s
x
T=
10 s
I2
Off
Applications
Q1
Exhaust
fan
Q2
x
Fresh-air
fan
Q3
Error
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