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VP500-TF2Z495EN-A
2 Specifications - continued
2.12.3 Relationship of flow and response performance to safety
function
• The safety function is to vent the compressed air in the protected
system so that the protected system does not present a hazard when
the application operates under the control of a suitable safety system.
• The time taken for the air to vent and remove the hazard is a function
of:
• The flow capacity of the valve
• The flow restriction of silencers fitted to the valve
• The volume of the protected system
• The pressure of the air in the protected system
• The flow restrictions in the protected system
• The end user is expected to establish the time taken to vent the
application system and ensure that this time is consistent with the
requirement of the overall safety system. This includes the selection of
suitable silencers.
The performance of the system should be validated by test after each
installation to ensure that the actual performance of the valve is
consistent with the safety function. Validate the performance of the
system under all foreseeable operating conditions of pressure, flow
and volume.
2.12.4 Mission time according to the Safety Standard
The operational life of the product shall be limited to the mission time
stated in section 2.2. The user is expected to calculate an equivalent
figure in time units from the B
value based on the operating cycles of
10D
the application. In no circumstances can the mission time exceed 20
years. After the mission time has expired for the component it shall be
replaced with a new unit.
2.12.5 MTTF
according to the Safety Standard
D
The B
for the component given in section 2.2 is derived from product
10D
knowledge and based on specific life tests. The system integrator should
use this data to determine MTTF
and the Performance Level (PL) of the
D
system using the methods described in the Safety Standard.
2.12.6 Diagnostic Coverage according to the Safety Standard
These valves are fitted with 'direct monitoring' according to Table E1 of
EN ISO 13849-1. When properly integrated these valve assemblies can
contribute to a DC value of 99% to the DCavg for the complete safety
function.
2.12.7 Common Cause Failures according to the Safety Standard
• CCF analysis is the responsibility of the system integrator.
• The single valve is a single channel system so CCF does not apply.
• The duplex valve has 2 channels made of identical valves. The use of
this valve might not allow the system calculation to include CCF points
for diversity.
3 Installation
3.1 Installation
Warning
• Do not install the product unless the safety instructions have been read
and understood.
• Do not install the product if it appears to have been damaged during
transport.
• The valve must be protected from contamination from the downstream
system when air is vented through the valve.
• Do not paint the product.
• Do not remove or cover up warnings or specifications printed or affixed
to the product.
• Ensure sufficient space for maintenance activities. When installing the
products, allow access for maintenance.
• Ensure that the connections of pipework and cables to the unit do not
result in a residual trip hazard to system operators or maintainers.
• If air leakage increases or equipment does not operate to specification,
stop operation.
• Check mounting conditions when air and power supplies are
connected. Initial function and leakage tests should be performed after
installation.
3.2 Environment
Warning
• Do not use in an environment where corrosive gases, chemicals, salt
water or steam are present.
• Do not use in an explosive atmosphere.
• Do not expose to direct sunlight. Use a suitable protective cover.
• Do not install in a location subject to vibration or impact in excess of
the product's specifications.
3 Installation - continued
• Do not mount in a location exposed to radiant heat that would result in
temperatures in excess of the product's specifications.
• Do not install in a location subject to strong magnetic fields.
• Do not install in an EMC environment other than 'industrial' according
to the scope of standard listed on the Declaration of Conformity.
• If it is used in an environment where there is possible contact with oil,
weld spatter, etc., exercise preventive measures.
• Products compliant with IP65 or more enclosures are protected against
dust and water, however, these products cannot be used in water.
• Products compliant with IP65 or more enclosures satisfy the
specifications by mounting each product properly. Be sure to read the
Specific Product Precautions for each product.
• When the solenoid valve is mounted in a control panel or is energised
for a long time, make sure ambient temperature is within the
specification of the valve.
• Ambient humidity
When using the valve in environments with low humidity, take
measures to prevent static.
If the humidity rises, take measures to prevent the adhesion of water
droplets on the valve.
Do not use in high humidity environment where condensation occurs.
• Altitude limitation is 1000 m above sea level for valves with Omron
switches and 2000 m for valves with Rockwell switches.
3.3 Piping
Caution
• Before connecting piping make sure to clean up chips, cutting oil, dust
etc.
• When installing piping or fittings, ensure sealant material does not
enter inside the port. When using seal tape, leave 1 thread exposed
on the end of the pipe/fitting.
Figure 11.
• Tighten fittings to the specified tightening torque.
Port
Connection thread
Tightening torque
size (R, NPT, G)
[N·m]
M5
1 to 1.5
X (External pilot)
1/8
3 to 5
1(P), 2(A), 3(R) for VP500
3/8
15 to 20
1(P), 2(A), 3(R) for VP700
1/2
20 to 25
Table 11.
• The valve must be protected from contamination from the downstream
system when air is vented through the valve.
• If no external pilot check valve is selected, supply port thread and
external pilot port thread will be of the same type.
External pilot port size: 1/8" (Note: M5 for VP#44(R)-X536).
3.4 Lubrication
Caution
• SMC products have been lubricated for life at manufacture, and do not
require lubrication in service.
• If a lubricant is used in the system, use turbine oil Class 1 (no additive),
ISO VG32. Once lubricant is used in the system, lubrication must be
continued because the original lubricant applied during manufacturing
will be washed away.
3.5 Air supply
Warning
• Please consult with SMC when using the product in applications other
than compressed air.
• Compressed air containing a large amount of water vapour can cause
malfunction of pneumatic equipment. An air dryer or water separator
should be installed upstream from filters.
• If condensation in the drain bowl is not emptied on a regular basis, the
bowl will overflow and allow the condensation to enter the compressed
air lines causing malfunction of pneumatic equipment.
• If the drain bowl is difficult to check and remove, installation of a drain
bowl with an auto drain option is recommended.
3 Installation - continued
• Use clean air. If the compressed air supply includes chemicals,
synthetic materials (including organic solvents), salinity, corrosive gas
etc., it can lead to damage or malfunction.
Caution
• The air supply to the valve must be large enough to operate the valve
and to deal with possible transient pressures. The recommended
piping size is 3/8" for the VP500 and 1/2" for the VP700. Also, use
piping with an I.D. of 10 mm or larger for the VP500, and 13 mm or
larger for the VP700.
• Ensure a constant pressure of 0.25 MPa or more.
• When selecting a regulator or a filter regulator, use piping larger than
the recommended size with sufficient flow rate characteristics.
• For extended piping between the regulator and the valve (inlet piping),
keep piping as short as possible (1 m or less).
• For use under conditions other than those listed above, please use the
external pilot type.
• When extremely dry air is used as the fluid, degradation of the
lubrication properties inside the equipment may occur, resulting in
reduced reliability (or reduced service life) of the equipment. Please
consult with SMC.
• Install an air filter upstream near the valve. Select an air filter with a
filtration size of 5 μm or smaller.
• Take measures to ensure air quality, such as by installing an
aftercooler, air dryer, or water separator.
Compressed air that contains a large amount of drainage can cause
malfunction of pneumatic equipment such as valves.
• If excessive carbon powder is seen, install a mist separator on the
upstream side of the valve.
If excessive carbon dust is generated by the compressor it may adhere
to the inside of a valve and cause it to malfunction.
• Use the external pilot type when using the VP500/700-X536 or X538
with the AV series. Install the AV series on the primary side.
• When using the external pilot type valve, it is recommended that the
main supply pressure and the pilot pressure are taken from separate
lines. The A/B options are available which have a check valve fitting in
the pilot port (see "How to order" in catalogue or drawing).
• If necessary, a check valve can be installed in the external pilot line to
prevent a drop in pilot pressure.
Warning
• If a check valve is fitted to the external pilot supply, ensure there is no
hazard created by any air trapped between the check valve and the
pilot valves.
• Minimise the distance between the valve and the air supply and
between the valve and the protected system.
• Do not place any devices between the valve and the protected system
that might interfere with the safety function.
• The exhaust ports of the valves should never be blocked and must be
protected from ingress of contamination by a suitable silencer or device
which does not affect the valve function.
3.6 Mounting
• Mounting orientation: Unrestricted.
• The valve assembly can be mounted using two M6 bolts for VP700 and
M5 bolts for VP500.
• The sub plate of the duplex variants are compatible with the AC series
FRL unit by the use of 'Y#00-A' spacers.
• Spacer Y300-A (Tightening torque 1.5 ± 0.05 N∙m) can be used with
the VP500 sub plate, and the Y400-A (Tightening torque 3 ± 0.05 N∙m)
with the VP500 sub plate with M1 option and the VP700 sub plate.
Figure 12. Y400-A spacer
Figure 13.Y400T-A spacer with bracket
• The single channel base mounted valves VP544-X536 and VP744-
X536 are available with a modular adapter which is compatible with
'Y#00-A' spacers. Refer to Modular Adapter catalogue for more details.
• Available modular adapters
Valve
Modular
Hexagonal hole
Tightening
adapter
width across flats
torque [N∙m]
VP544-X536
M
E310-U03
10
24 to 26
VP544-X536
M1
E410-U03
10
24 to 26
VP744-X536
M
E410-U04
12
30 to 34
Table 12.
3 Installation - continued
3.7 Noise
Caution
• It is recommended that silencers or noise reduction devices are fitted
to protect personnel from transient noise when the valves are de-
energised.
• The pressure drop of silencers or devices must be taken into account
during the design and testing of the application system to ensure that
the safety function is maintained.
3.8 Electrical connection
Caution
• When electric power is connected to a solenoid valve, be careful to
apply the proper voltage. Improper voltage may cause malfunction or
coil damage.
• Check if the connections are correct after completing all wiring.
3.8.1 Pilot valve
3.8.1.1 Surge voltage suppression
For DIN terminal:
No.1
(-,+)
COIL
VARISTOR
Varistor
Coil
No.2
LED
(+,-)
DIN terminal has no polarity.
Figure 14.
3.8.1.2 Pilot valve connections
• DIN interchangeability
The 'Y' type DIN terminal corresponds to the DIN connector with a
terminal pitch of 8 mm, which complies with EN175301-803C. The pitch
is different from the 'D' type DIN connector (which has a pitch of 9.4 mm),
the two types are therefore not interchangeable.
• Applicable cable dia: Ø3.5 ~ Ø7 mm
3.8.1.3 Using DIN connector with the pilot valve
Caution
Connection
1) Loosen the holding screw and pull the connector out of the solenoid
valve terminal block.
2) After removing the holding screw, insert a flat head screwdriver, etc.
into the notch on the bottom of the terminal block and pry it open,
separating the terminal block and the housing.
3) Loosen the terminal screws (slotted screws) on the terminal block,
insert the cores of the lead wires into the terminals according to the
connection method, and fasten them securely with the terminal screws.
4) Secure the cord by fastening the gland nut.
Caution
• When making connections, take note that using other than the
supported size (ø3.5 to ø7) heavy duty cord will not satisfy IP65
(enclosure) standards.
• Also, be sure to tighten the gland nut and holding screw within their
specified torque ranges.
• Ensure sealing gaskets are correctly installed.
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