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Working Principle Diagram
Working Principle Diagram
W
Working
orking Principle
Principle
Block Diagram
Block Diagram
Input signal
Input signal
+
+
–
–
r
r
Control circuit
Control circuit
q
q
Vacuum pressure
Vacuum pressure
solenoid valve
solenoid valve
w
w
Atmospheric pressure
Atmospheric pressure
solenoid valve
solenoid valve
e
e
Pressure sensor
Pressure sensor
A
ATM
TM
Output pressure
Output pressure
VAC.
VAC.
P
P
ATM
ATM
(Atmospheric pressure)
(Atmospheric pressure)
VAC.
VAC.
(Vacuum pump, etc.)
(Vacuum pump, etc.)
OUT
OUT
w
w
Atmospheric pressure solenoid valve
Atmospheric pressure solenoid valve
e
e
Pressure sensor
Pressure sensor
q
q
Vacuum pressure solenoid valve
Vacuum pressure solenoid valve
Input signal
Input signal
P
Po
ow
we
er
r
s
su
up
pp
plly
y
O
Ou
uttp
pu
ut
t
s
siig
gn
na
all
r
r
Control circuit
Control circuit
Power supply and error
Power supply and error
LED indication
LED indication
When the input signal rises, the
When the input signal rises, the vacuum pressure soloenoid valve
vacuum pressure soloenoid valve
q
q
turns ON. Due to this, part of the vacuum pressure (VAC.)
turns ON. Due to this, part of the vacuum pressure (VAC.)
passes through the vacuum pressure solenoid valve
passes through the vacuum pressure solenoid valve
q
q
and changes to a vacuum pressure. This vacuum pressure feeds back to
and changes to a vacuum pressure. This vacuum pressure feeds back to
the control circuit
the control circuit
r
r
via the pressure sensor
via the pressure sensor
e
e
. Here, the vacuum pressure soloenoid valve and the
. Here, the vacuum pressure soloenoid valve and the atmospheric pressure
atmospheric pressure
soloenoid valve work alternately to make continuous pressure corrections until vacuum pressure becomes proportional to the
soloenoid valve work alternately to make continuous pressure corrections until vacuum pressure becomes proportional to the
input signal, thus, supplying vacuum pressure that is consistently proportional to the input signal.
input signal, thus, supplying vacuum pressure that is consistently proportional to the input signal.
186
186
Series
Series
ITV009
ITV009
A
A