SMC Networks ITV0000 Series Manual page 8

ITV0000
Series
Working Principle
When the input signal rises, the air supply solenoid valve q turns ON. Due to this, part of the supply pressure passes through the
air supply solenoid valve q and changes to output pressure. This output pressure feeds back to the control circuit r via the
pressure sensor e. Here, pressure corrections continue until output pressure becomes proportional to the input signal, enabling
output pressure that is proportional to the input signal.
q Air supply solenoid valve
SUP
EXH
Input signal
7
Working Principle Diagram
Power supply
Input signal
+
r Control
circuit
–
e Pressure
sensor
Power supply and error
LED indication
r Control circuit
Block Diagram
Supply pressure
q Air supply
solenoid valve
w Exhaust
solenoid valve
Discharged to atmosphere
Output signal
P
e Pressure sensor
w Exhaust solenoid valve
OUT
Output pressure