![background image](http://html.mh-extra.com/html/smc-networks/itv0000-series/itv0000-series_manual_1299568015.webp)
169
169
Electro-Pneumatic Regulator
Electro-Pneumatic Regulator
Series
Series
ITV1000/2000/3000
ITV1000/2000/3000
When the input signal rises, the air supply solenoid valve
When the input signal rises, the air supply solenoid valve
q
q
turns ON, and the exhaust solenoid valve
turns ON, and the exhaust solenoid valve
w
w
turns OFF. Therefore,
turns OFF. Therefore,
supply pressure passes through the air supply solenoid valve
supply pressure passes through the air supply solenoid valve
q
q
and is applied to the pilot chamber
and is applied to the pilot chamber
e
e
. The pressure in the pilot
. The pressure in the pilot
chamber
chamber
e
e
increases and operates on the upper surface of the diaphragm
increases and operates on the upper surface of the diaphragm
r
r
..
As a result, the air supply valve
As a result, the air supply valve
t
t
linked to the diaphragm
linked to the diaphragm
r
r
opens, and a portion of the supply pressure becomes output
opens, and a portion of the supply pressure becomes output
pressure.
pressure.
This output pressure feeds back to the control circuit
This output pressure feeds back to the control circuit
i
i
via the pressure sensor
via the pressure sensor
u
u
. Here, a correct operation functions until the
. Here, a correct operation functions until the
output pressure is proportional to the input signal, making it possible to always obtain output pressure proportional to the input
output pressure is proportional to the input signal, making it possible to always obtain output pressure proportional to the input
signal.
signal.
Working Principles
Working Principles
Supply pressure
Supply pressure
q
q
Air supply solenoid valve
Air supply solenoid valve
w
w
Exhaust solenoid valve
Exhaust solenoid valve
r
r
D
Diia
ap
ph
hrra
ag
gm
m
P
Piillo
ot
t v
va
allv
ve
e
u
u
Pressure sensor
Pressure sensor
i
i
Control circuit
Control circuit
IIn
np
pu
ut
t
s
siig
gn
na
all
O
Ou
uttp
pu
ut
t
p
prre
es
ss
su
urre
e
ITV2000, 3000
ITV2000, 3000
ITV1000
ITV1000
Working Principle Diagram
Working Principle Diagram
Block Diagram
Block Diagram
P
P
EXH
EXH
SUP
SUP
OUT
OUT
EXH
EXH
t
t
Supply valve
Supply valve
u
u
Pressure sensor
Pressure sensor
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
Diaphragm
Diaphragm
e
e
Pilot chamber
Pilot chamber
P
P
EXH
EXH
w
w
Exhaust
Exhaust
solenoid
solenoid
valve
valve
u
u
Pressure sensor
Pressure sensor
q
q
Air supply
Air supply
solenoid
solenoid
valve
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
Diaphragm
Diaphragm
e
e
Pilot chamber
Pilot chamber
EXH
EXH
OUT
OUT
SUP
SUP
w
w
Exhaust
Exhaust
solenoid
solenoid
valve
valve
y
y
Exhaust
Exhaust
valve
valve
t
t
Supply
Supply
valve
valve
Pressure display
Pressure display
Pressure display
Pressure display
i
i
Control
Control
circuit
circuit
i
i
Control
Control
circuit
circuit
q
q
Air supply
Air supply
solenoid
solenoid
valve
valve
A
A
l
l
p
p
h
h
a
a
b
b
e
e
t
t
i
i
c
c
a
a
l
l
I
I
n
n
d
d
e
e
x
x
L
L
e
e
n
n
g
g
t
t
h
h
M
M
e
e
a
a
s
s
u
u
r
r
i
i
n
n
g
g
/
/
C
C
o
o
u
u
n
n
t
t
e
e
r
r
S
S
t
t
a
a
t
t
i
i
c
c
E
E
l
l
e
e
c
c
t
t
r
r
i
i
c
c
i
i
t
t
y
y
E
E
l
l
i
i
m
m
i
i
n
n
a
a
t
t
i
i
o
o
n
n
E
E
q
q
u
u
i
i
p
p
m
m
e
e
n
n
t
t
R
R
e
e
d
d
u
u
c
c
e
e
d
d
-
-
w
w
i
i
r
r
i
i
n
n
g
g
F
F
i
i
e
e
l
l
d
d
b
b
u
u
s
s
S
S
y
y
s
s
t
t
e
e
m
m
P
P
o
o
s
s
i
i
t
t
i
i
o
o
n
n
D
D
e
e
t
t
e
e
c
c
t
t
i
i
o
o
n
n
S
S
w
w
i
i
t
t
c
c
h
h
F
F
l
l
o
o
w
w
S
S
e
e
n
n
s
s
o
o
r
r
P
P
r
r
e
e
s
s
s
s
u
u
r
r
e
e
C
C
o
o
n
n
t
t
r
r
o
o
l
l
P
P
r
r
e
e
s
s
s
s
u
u
r
r
e
e
S
S
e
e
n
n
s
s
o
o
r
r
A
A