SMC Networks VP Series Manual page 2

Safety Standard ISO 13849-1 Certifi ed
3 Port Solenoid Valve/Residual Pressure Release Valve with Detection of Main Valve Position
With Detection of Main Valve Position
Category 2 Safety function can be accomplished by single channel and is automatically
checked.
Input signal
I
Logical operation
Input equipment
equipment
Monitoring
Testing equipment
The detecting function of the main valve position detects a
mismatch between the input signal and valve operation.
Input equipment (I) : Detection equipment (sensor) of starting event
Logical operation equipment (L) : Relay sequence circuit, PLC control program
Output equipment (O) : Solenoid valve, Electromagnetic switch, Output relay
Recommended valve : VP542/742-X536
Residual pressure release valve
∗ This product is component which is a part of a safety system and safety equipment is not guaranteed by this single unit alone.
Highly reliable construction
q The main valve position is detected by transferring the
main valve movement directly to the reed safety limit switch
with the rod.
Main valve
w Long service life: B10d: 10 million times ∗
e The return spring releases the residual pressure securely
regardless of pressure level.
∗ For VP -X536/X538/X555, safety limit switch made by OMRON
With soft start-up function (-X555/X585)
Soft start-up
valve
VP544-X555
VP544-X585
1
(Category 2)
L
O
Output equipment
Output signal
TE OTE
Output of test result
Output signal
Safety limit
switch
VP542-X536
Rod
Safety limit switch
¼ A function to gradually increase the initial pressure
of the pneumatic system has been added to the dual
residual pressure release valve.
¼ Fixed orifi ce and variable throttle are available as a throttle
for adjusting the pressure increase. (Ø 1, Ø 1.5, Ø 2)
Throttle Main valve Valve 1
1(P)
P
1
Soft start-up
valve
3(R) 3(R)
Redundant system can be constructed easily.
Category 3 It has redundancy so there is no loss of safety function with a single failure.
The safety function must be checked before each use. An accumulation of
undetected faults can cause loss of safety function.
Category 4 It has redundancy so there is no loss of safety function with a single failure. The
safety function must be checked before each use. An accumulation of undetected
faults does not affect the safety function. (Higher DC and MTTFd than Category 3.)
Input signal
I1
Input equipment
Cross monitoring
Input signal
I2
Input equipment
When the dual residual pressure release valve is used, if one of the
valves fails to operate, the other one releases residual pressure.
Input equipment (I1, I2): Detection equipment (sensor) of starting event
Logical operation equipment (L1, L2): Relay sequence circuit, PLC control program
Output equipment (O1, O2): Solenoid valve, Electromagnetic switch, Output relay
Recommended valve: VP544/744-X538, VG342-X87
Residual pressure release valve w
Residual pressure
release valve q
Safety limit switch can be selected.
Made by OMRON
Conduit (VP series only) and
M12 connector (4 pin) types
are available.
Output Pressure (P
P
1
Valve 2
P
2
1/2P
1
Start supplying flow ad-
2(A)
justed air with the throt-
tle by energising valve
1 and valve 2.
0
Series
Monitoring
L1
Logical operation
equipment
Output signal
Monitoring
L2
Logical operation
equipment
Output signal
Safety limit
switch
VP544-X538
Made by Rockwell Automation
M12 connector with 6 pins is
available.
) vs Time Graph
2
P reaches half of P , and
2 1
then the main valve of the
soft start-up valve turns on.
Soft start-up valve: ON
Valve 1, Valve 2: ON
Soft start-up valve : OFF
Valve 1, Valve 2: ON
VP/VG
(Category 3, 4)
O1
Output equipment
O2
Output equipment
Time