SMC Networks ITV0000 Series, Manual

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Series ITV209 Series ITV209
 
Working Principle Working Principle
Block Diagram Block Diagram
When the input signal increases, the vacuum pressure solenoid When the input signal increases, the vacuum pressure solenoid
valve
valve
q q
turns ON, and the atmospheric pressure solenoid valve turns ON, and the atmospheric pressure solenoid valve
w w
turns OFF. Because of this, VAC. and the pilot chamber turns OFF. Because of this, VAC. and the pilot chamber
e e
are are
connected, the pressure in the pilot chamber connected, the pressure in the pilot chamber
e e
becomes becomes
negative and acts on the top of the diaphragm negative and acts on the top of the diaphragm r r ..
As a result, the vacuum pressure valve As a result, the vacuum pressure valve
t t
which is linked to the which is linked to the
diaphragm diaphragm
r r
opens, VAC. and OUT. are connected, and the set opens, VAC. and OUT. are connected, and the set
pressure becomes negative. pressure becomes negative.
This negative pressure feeds back to the control circuit
This negative pressure feeds back to the control circuit
i i
via the via the
pressure sensor pressure sensor
u u
. Then, a correct operation works until a . Then, a correct operation works until a
vacuum pressure proportional to the input signal is reached, and vacuum pressure proportional to the input signal is reached, and
a vacuum pressure is obtained which is always proportional to
a vacuum pressure is obtained which is always proportional to
the input signal.
the input signal.
Linearity Linearity
H Hy ys stte erre es siis s R Re ep pe ea atta ab biilliitty y
Pressure Pressure
Characteristics
Characteristics
Flow Flow
Characteristics
Characteristics
Set pressure: –20 kPa Set pressure: –20 kPa
Supply vacuum pressure: Supply vacuum pressure:
–100 kPa
–100 kPa
Flow characteristics Flow characteristics
measurement conditions
measurement conditions
•• Exhaust flow ra Exhaust flow rate of the vacuum pum te of the vacuum pump p
used for measurement: 500 L/min (ANR) used for measurement: 500 L/min (ANR)
•• Inlet vacuum Inlet vacuum pressure: pressure: –100 kPa –100 kPa
(When outlet flow ra (When outlet flow rate is 0 L/min (ANR)) te is 0 L/min (ANR))
•• Maximum flo Maximum flow rate: 132 w rate: 132 L/min (ANR) L/min (ANR)
(With inlet vac (With inlet vacuum pressure at –39 uum pressure at –39 kPa) kPa)
Working Principle Working Principle
VAC. VAC.
Input Input
signal
signal
Set Set
pressure
pressure
+ +
– –
t t
Control Control
circuit circuit
Pilot valve Pilot valve
r r
Diaphragm Diaphragm
q q
Vacuum Vacuum
pressure
pressure
solenoid valve
solenoid valve
w w
Atmospheric Atmospheric
pressure pressure
solenoid valve solenoid valve
u u
Pressure sensor Pressure sensor
Set point Set point
0 0
– –
20 20
– –
40 40
– –
60 60
– –
80 80
1 1
0.5 0.5
0 0
– –
0.5 0.5
– –
1 1
0 0 2 25 5 5 50 0 7 75 5 1 10 00 0
1.0 1.0
0.5 0.5
0 0
– –
0.5 0.5
– –
1.0 1.0
1.0 1.0
0.5 0.5
0 0
– –
0.5 0.5
– –
1.0 1.0
0 0
–10 –10
–20 –20
–30 –30
–40 –40
–50 –50
–60 –60
–70 –70
–80 –80
–90 –90
0 0 2 25 5 5 50 0 7 75 5 1 10 00 0
0 0 2 2 4 4 6 6 8 8 1 10 0
5 50 0 1 10 00 0 1 15 50 0
– –
100 100
– –
80 80
– –
60 60
– –
40 40
– –
20 20
Input signal (% F.S.) Input signal (% F.S.)
O O
u u
t t
p p
u u
t t
p p
r r
e e
s s
s s
u u
r r
e e
( (
k k
P P
a a
) )
IIn np pu ut t s siig gn na al l ((% % F F..S S..)) C Co ou un ntt
Return Return
Out Out
O O
u u
t t
p p
u u
t t
d d
e e
v v
i i
a a
t t
i i
o o
n n
f f
a a
c c
t t
o o
r r
( (
% %
F F
. .
S S
. .
) )
O O
u u
t t
p p
u u
t t
d d
e e
v v
i i
a a
t t
i i
o o
n n
f f
a a
c c
t t
o o
r r
( (
% %
F F
. .
S S
. .
) )
V VA AC C. . s siid de e p prre es ss su urre e ((S Su up pp plly y p prre es ss su urre e) ) ((k kP Pa a)) F Fllo ow w rra atte e ((L L//m miin n((A AN NR R))))
O O
u u
t t
p p
u u
t t
d d e e
v v
i i
a a
t t
i i
o o
n n
f f
a a
c c
t t
o o
r r
( (
% %
F F
. .
S S
. .
) )
S S
e e t t
p p
r r
e e
s s
s s
u u
r r
e e
( (
k k
P P
a a
) )
P P
t t
Vacuum pressure Vacuum pressure
valve valve
w w
Atmospheric pressure Atmospheric pressure
solenoid valve solenoid valve
u u Pressure sensor Pressure sensor
q q
Vacuum pressure Vacuum pressure
solenoid valve 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
Diaphragm Diaphragm
e e
Pilot chamber Pilot chamber
y y Atmospheric pressure Atmospheric pressure
valve valve
Atmospheric Atmospheric
pressure
pressure
i i
Control Control
circuit circuit
VAC. VAC.
(Vacuum pump, etc.) (Vacuum pump, etc.)
OUT. OUT.
(Set pressure) (Set pressure)
ATM ATM
(Atmospheric pressure) (Atmospheric pressure)
Pressure Pressure
display display
A AT TM M A AT TM M
193 193
Series Series
ITV209 ITV209  
Electronic Vacuum Regulator Electronic Vacuum Regulator
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