SMC Networks VG342 Series User manual

Doc. No.VG300∗∗-OMH0002-B
3 Port Solenoid Valve
PRODUCT NAME
VG342 Series
MODEL/ Series

VG300∗∗-OMH0002-B
Contents
Safety Instructions ---------------------------------------------------------------------------- 2,3
Precautions on Design ---------------------------------------------------------------------- 4,5
Selection ---------------------------------------------------------------------------------------- 4,5
Mounting ---------------------------------------------------------------------------------------- 5
Piping -------------------------------------------------------------------------------------------- 5,6
Wiring -------------------------------------------------------------------------------------------- 6
Lubrication -------------------------------------------------------------------------------------- 6
Air Supply --------------------------------------------------------------------------------------- 6
Operating Environment ---------------------------------------------------------------------- 7
Maintenance ------------------------------------------------------------------------------------ 7
Specific Product Precautions --------------------------------------------------------------- 8, 9
Trouble shooting ------------------------------------------------------------------------------- 10
Remedy ------------------------------------------------------------------------------------------ 11
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VG300∗∗-OMH0002-B
Safety Instructions
These safety instructions are intended to prevent hazardous situations and/or equipment damage.
These instructions indicate the level of potential hazard with the labels of “Caution,” “Warning” or “Danger.”
They are all important notes for safety and must be followed in addition to International Standards
(ISO/IEC)*1) , and other safety regulations.
*1) ISO 4414: Pneumatic fluid power -- General rules relating to systems
ISO 4413: Hydraulic fluid power -- General rules relating to systems
IEC 60204-1: Safety of machinery -- Electrical equipment of machines (Part 1: General requirements)
ISO 10218-1992: Manipulating industrial robots -Safety.
etc.
Caution
Caution indicates a hazard with a low level of risk which, if not avoided, could result
in minor or moderate injury.
Warning
Warning indicates a hazard with a medium level of risk which, if not avoided, could
result in death or serious injury.
Danger
Danger indicates a hazard with a high level of risk which, if not avoided, will result
in death or serious injury.
Warning
1. The compatibility of the product is the responsibility of the person who designs the equipment or
decides its specifications.
Since the product specified here is used under various operating conditions, its compatibility with specific
equipment must be decided by the person who designs the equipment or decides its specifications based on
necessary analysis and test results.
The expected performance and safety assurance of the equipment will be the responsibility of the person who
has determined its compatibility with the product.
This person should also continuously review all specifications of the product referring to its latest catalog
information, with a view to giving due consideration to any possibility of equipment failure when configuring the
equipment.
2. Only personnel with appropriate training should operate machinery and equipment.
The product specified here may become unsafe if handled incorrectly.
The assembly, operation and maintenance of machines or equipment including our products must be
performed by an operator who is appropriately trained and experienced.
3. Do not service or attempt to remove product and machinery/equipment until safety is confirmed.
1.The inspection and maintenance of machinery/equipment should only be performed after measures to
prevent falling or runaway of the driven objects have been confirmed.
2.When the product is to be removed, confirm that the safety measures as mentioned above are implemented
and the power from any appropriate source is cut, and read and understand the specific product precautions
of all relevant products carefully.
3. Before machinery/equipment is restarted, take measures to prevent unexpected operation and malfunction.
4. Contact SMC beforehand and take special consideration of safety measures if the product is to
be used in any of the following conditions.
1. Conditions and environments outside of the given specifications, or use outdoors or in a place exposed to
direct sunlight.
2. Installation on equipment in conjunction with atomic energy, railways, air navigation, space, shipping,
vehicles, military, medical treatment, combustion and recreation, or equipment in contact with food and
beverages, emergency stop circuits, clutch and brake circuits in press applications, safety equipment or
other applications unsuitable for the standard specifications described in the product catalog.
3. An application which could have negative effects on people, property, or animals requiring special safety
analysis.
4.Use in an interlock circuit, which requires the provision of double interlock for possible failure by using a
mechanical protective function, and periodical checks to confirm proper operation.

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VG300∗∗-OMH0002-B
Safety Instructions
Caution
1.The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in manufacturing industries.
If considering using the product in other industries, consult SMC beforehand and exchange specifications
or a contract if necessary.
If anything is unclear, contact your nearest sales branch.
Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance
Requirements”.
Read and accept them before using the product.
Limited warranty and Disclaimer
1.The warranty period of the product is 1 year in service or 1.5 years after the product is
delivered.∗
∗∗
∗2)
Also, the product may have specified durability, running distance or replacement parts. Please
consult your nearest sales branch.
2. For any failure or damage reported within the warranty period which is clearly our responsibility,
a replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other damage
incurred due to the failure of the product.
3. Prior to using SMC products, please read and understand the warranty terms and disclaimers
noted in the specified catalog for the particular products.
∗
∗∗
∗2) Vacuum pads are excluded from this 1 year warranty.
A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.
Also, even within the warranty period, the wear of a product due to the use of the vacuum
pad or failure due to the deterioration of rubber material are not covered by the limited
warranty.
Compliance Requirements
1. The use of SMC products with production equipment for the manufacture of weapons of mass
destruction(WMD) or any other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are govemed by the
relevant security laws and regulation of the countries involved in the transaction. Prior to the
shipment of a SMC product to another country, assure that all local rules goveming that export
are known and followed.
ollowed.ollowed.
ollowed.

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VG300∗∗−OMH0002-B
Design ／
／／
／Selection
1. Confirm the specifications
Products represented in this manual are designed only for
use in compressed air systems (including vacuum).
Do not operate at pressures or temperatures, etc., beyond
the range of specifications, as this can cause damage or
malfunction. (Refer to the specifications.)
Please contact SMC when using a fluid other than com-
pressed air (including vacuum).
We do not guarantee against any damage if the product is
used outside of the specification range.
2. Actuator drive
When an actuator, such as a cylinder, is to be driven using
a valve, take appropriate measures (cover installation or
approach prohibition) to prevent potential danger caused
by actuator operation.
3. Holding pressure (including vacuum)
Since the valves are subject to air leakage, they cannot be
used for applications such as holding pressure (including
vacuum) in a pressure vessel.
4. Not suitable for use as an emergency shutoff
valve, etc.
The valves listed in this manual are not designed for
safety applications such as an emergency shutoff valve. If
the valves are used for the mentioned applications,
additional safety measures should be adopted.
5. Release of residual pressure
For maintenance purposes install a system for releasing
residual pressure.
6. Operation in a vacuum condition
When a valve is used for switching a vacuum, take
measures to install a suction filter or similar to prevent
external dust or other foreign matter from entering inside
the valve.
In addition, at the time of vacuum adsorption, be sure to
vacuum at all times. Failure to do so may result in foreign
matter sticking to the adsorption pad, or air leakage
causing the workpiece to drop.
7. Regarding a vacuum switch valve and a va-
cuum release valve
If a non-vacuum valve is installed in the middle of piping
system having a vacuum, the vacuum condition will not
be maintained. Use a valve designed for use under
vacuum condition.
8. Ventilation
Provide ventilation when using a valve in a confined area,
such as in a closed control panel. For example, install a
ventilation opening, etc. in order to prevent pressure from
increasing inside of the confined area and to release the
heat generated by the valve.
9. Extended periods of continuous energization
•If a valve will be continuously energized for an extended
period of time, the temperature of the valve will increase
due to the heat generated by the coil. This will likely
adversely affect the performance of the solenoid valve
and any nearby peripheral equipment. Therefore, when
it is continuously energized or the energized period per
day is longer than the de-energized period use
continuous energization type.
•For applications such as mounting a valve on a control
panel, incorporate measure to limit the heat radiation so
that it is within the operating temperature range.
10. Do not disassemble the product or make any
modifications, including additional machining.
It may cause human injury and/or an accident.
1. Leakage voltage
Take note that the leakage voltage will increase when a
resistor is used in parallel with switching element or a C-R
circuit (surge voltage suppressor) is used for protecting a
switching device because of the passing leakage voltage
through the C-R circuit. The suppressor residual leakage
voltage should be as follows.
DC coil: 3% or less of rated voltage
AC coil:15% or less of rated voltage
VG342 Series
3 Port Solenoid Valve / Precautions 1
Be sure to read before handling.
Warning
Caution

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VG300∗∗−OMH0002-B
2. Solenoid valve drive for AC with a solid state
output (SSR, TRIAC output, etc.)
1) Current leakage
When using a snubber circuit (C-R element) for surge
protection of the output, a very small amount of
electrical current will continue to flow even during the
OFF state.
This results in the valve not returning. In a situation
where the tolerance is exceeded, as in the above case,
take measures to install a bleeder resistor.
2) Minimum allowable load amount (Min. load current)
When the consumption current of a valve is less than
the output’s minimum allowable load volume or the
margin is small, the output may not switch normally.
Please contact SMC.
3. Surge voltage suppressor
If a surge protection circuits contains nonstandard diodes,
such as Zener diodes or varistor, a residual voltage that is
in proportion to the protective circuit and the rated voltage
will remain. Therefore, take into consideration the surge
voltage protection of the controller.
In the case of diodes, the residual voltage is appro-
ximately 1V.
4. Operation in a low temperature condition
It is possible to operate a valve in extreme temperature,
as low as -10
o
C. Take appropriate measures to avoid
freezing of drainage, moisture etc. in low temperature.
5. Operation for air blowing
When using a solenoid valve for air blowing, use an
external pilot type.
Additionally, when compressed air within the pressure
range of the established specifications is supplied to the
external pilot type valve’s port.
6. Mounting orientation
Mounting orientation is free.
Mounting
1. Operation manual
Install the products and operate them only after reading
the operation manual carefully and understanding its
contents. Also, keep the manual where it can be referred
to as necessary.
2. Ensure sufficient space for maintenance ac-
tivities
When installing the products, allow access for main-
tenance.
3. Tighten threads with the proper tightening
torque.
When installing the products, follow the listed torque
specifications.
4. If air leakage increases or equipment does not
operate properly, stop operation.
Check mounting conditions when air and power supplies
are connected. Initial function and leakage tests should
be preformed after installation.
5. Painting and coating
Warnings or specifications printed or affixed to the
product should not be erased, removed or covered up.
Please consult with SMC before applying paint to
resinous parts, as this may have an adverse effect due to
the solvent in the paint.
Piping
1. Preparation before piping
Before piping is connected, it should be thoroughly blown
out with air (flushing) or washed to remove chips, cutting
oil and other debris from inside the pipe.
2. Wrapping of pipe tape
When screwing piping or fittings into ports, ensure that
chips from the pipe threads or sealing material do not
enter the piping. Also, if pipe tape is used, leave 1 thread
ridge exposed at the end of the threads.
Design ／
／／
／Selection
VG342 Series
3 Port Solenoid Valve / Precautions 2
Be sure to read before handling.
Caution
Caution
Warning

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VG300∗∗−OMH0002-B
Piping
3. Connection of fittings
When screwing fittings into valves, tighten as follows.
Rc
Tighten with the proper torque shown below.
Tightening Torque for Piping
Connection thread Proper tightening torque (N・m )
Rc1/8 7 to 9
Rc1/2 28 to 30
Rc3/4 28 to 30
Rc1 36 to 38
Follow the procedure of the manufacturer when fittings
other than SMC is used.
Wiring
1. Polarity
When connecting power to a solenoid valve with a DC
specification and equipped with a light or surge voltage
suppressor, check for polarity.
If polarity connection is wrong, the valve does not
operate.
2. Applied voltage
When electric power is connected to a solenoid valve, be
careful to apply the proper voltage. Improper voltage may
cause malfunction or coil damage.
3. Check the connections.
Check if the connections are correct after completing all
wiring.
Lubrication
1. Lubrication
1) The valve has been lubricated for life by the factory and
does not require any further.
2) If a lubricant is used in the system, use class 1 turbine oil
(no additive), ISO VG32.
Once a lubricant is used in the system, lubrication must
be continued because the original lubricant applied
during manufacturing will be washed away.
If turbine oil is used, refer to the Material Safety Data
Sheet (MSDS) of the oil.
3) Please contact SMC regarding class 2 turbine oil (with
additives), ISO VG32.
Air Supply
1. Type of fluids
Please consult with SMC when using the product in
applications other than compressed air.
2. When there is a large amount of drainage.
Compressed air containing a large amount of drainage
can cause malfunction of pneumatic equipment. An air
dryer or water separator should be installed upstream
from filters.
3. Drain flushing
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. It causes
malufunction 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.
For compressed air quality, refer to SMC’s Best Pneumatics
catalog,
4. Use clean air.
Do not use compressed air that contains chemicals,
synthetic oils including organic solvents, salt or corrosive
gases, etc., as it can cause damage or malfunction.
1. 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 equip-
ment. Please consult with SMC.
2. Install an air filter.
Install an air filter upstream near the valve. Select an air
filter with a filtration size of 5μｍ or smaller.
3. 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. Therefore, take appropriate measures to ensure
air quality, such as by providing an aftercooler, air dryer, or
water separator.
4. If excessive carbon powder is seen, install a
mist separator on the upstream side of the valve.
If excessive carbon powder is generated by the
compressor, it may adhere to the inside of a valve and
cause it to malfunction.
For compressed air quality, refer to SMC’s Best Pneumatics
catalog.
Caution
VG342 Series
3 Port Solenoid Valve / Precautions 3
Be sure to read before handling.
Caution
Warning
Warning
Caution

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VG300∗∗−OMH0002-B
Operating Environment
1. Do not use in an atmosphere having corrosive
gases, chemicals, sea water, water, water steam,
or where there is direct contact with any of
these.
2. Do not use in an environment where flammable
gas or explosive gas exists. Usage may cause a
fire or explosion. The products do not have an
explosion proof construction.
3. Do not use in a place subject to heavy vibration
and/or shock.
4. The valve should not be exposed to prolonged
sunlight. Use a protective cover.
5. Remove any sources of excessive heat.
6. If it is used in an environment where there is
possible contact with oil, weld spatter, etc.,
exercise preventive measures.
7. When the solenoid valve is mounted in a control
panel or its energized for a long time, make sure
ambient temperatures is within the specification
of the valve.
Maintenance
1. Perform maintenance inspection according to
the procedures indicated in the operation
manual.
If handled Improperly, malfunction and damage of
machinery or equipment may occur.
2. Removal of equipment, and supply/exhaust of
compressed air
When components are removed, first confirm that
measures are in place to prevent workpieces from dropping,
run-away equipment, etc. Then, cut off the supply pressure
and electric power, and exhaust all compressed air from the
system using the residual pressure release function.
When the equipment is operated after remounting or
replacement, first confirm that measures are in place to
prevent lurching of actuators, etc. Then, confirm that the
equipment is operating normally.
3. Low frequency operation
Valves should be operated at least once every 30 days to
prevent malfunction. (Use caution regarding the air supply.)
4. Manual override
When the manual override is operated, equipment will be
actuated.
Operate after safety is confirmed.
1. Drain flushing
Remove drainage from the air filters regularly.
2. Lubrication
Once lubrication has been started, it must be continued.
Use class 1 turbine oil (with no additive), ISO VG32
because if other lubricant oil is used, it may cause
malfunction. Please contact SMC for suggested class 2
turbine oil (with additive), ISO VG32.
VG342 Series
3 Port Solenoid Valve / Precautions 4
Be sure to read before handling.
Warning
Caution
Warning

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VG300∗∗-OMH0002-B
Light/Surge Voltage Suppressor
Electrical Connection
In the case of DIN terminal and terminal (with light/surge
voltage suppressor), the connection is as follows. Connect
each to the power supply side.
Terminal no. 1 2
DIN terminal + -
Terminal + -
How to Change Passage State
When change the passage state, confirm that pressure has
been removed from the valve.
Unscrew the M4 x 0.7 hexagon socket head cap screw in the
changeover plate and match the ◀ mark on the adapter
plate with the character on the changeover plate.
Piping is as follows.
Mounting Screw Tightening Torques M4:1.4N･
･･
･m
Piping Port
Passage P A R
N.C. Inlet Outlet Exhaust side
(Plug, in case
of 2 port valve)
N.O. Exhaust side
(Plug, in case
of 2 port valve)
Outlet Inlet
External
Universal porting
(Piping of inlet pressure side is possible
anywhere)
Note 1) In the case of internal pilot, confirm that a plug is
inserted to X port. If not, insert a R1/8 plug.
Note 2) In the case of external pilot, supply air pressure from
X port.
Confirm the safety sufficiently and conduct carefully when
changing the passage state or restarting after changes.
Precautions
1. Since PE port is the exhaust port of the pilot valve, do not
attach a plug or reduce the port diameter.
2. X port is the pressure supply port of the pilot valve and PE
port is the exhaust port of the pilot valve. Avoid
mismatching when piping.
3. The manual portion contains a breather hole for the core.
Take proper measures to prevent dust or foreign matter
from accumulating in this area.
VG342 Series
3 Port Solenoid Valve / Specific Product 1
Be sure to read before handling.
Caution
In the case of
indicator light assembly
AC, 100 VDC or more
48 VDC of less
In the case of
indicator light assembly
Varistor
Coil Coil
Terminal no. 1 (+)
Terminal no. 1 (+)
Terminal no. 2 (-)
Terminal no. 2 (-)
N.C.
N.O. External pilot
M4X0.7
With DIN terminal
block With terminal
block
Ground

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VG300∗∗-OMH0002-B
If energizing the valve for a long time, use “VG342□-□□□-
□□□-E” (Pilot valve assembly: “VO307E-□□□-X84”).
1. This model is for continuous duty, not for high cycle rates.
But even in low cycle rates, if energizing the valve more
than once a day, please consult with SMC.
2. Make sure to cycle valve at least once every 30 days.
How to Use DIN Terminal
1. Disassembly
1) After loosening the screw (1), then if the housing (2) is
pulled in the direction of the screw, the connector will
be removed from the body of equipment (solenoid,
etc.).
2) Pull the screw (1) out of the housing (2).
3) On the bottom part of the terminal block (3), there’s a
cut-off part (9). If a small flat head screwdriver is
inserted between the opening in the bottom, terminal
block (3) will be removed from the housing (2). (Refer
to Figure-1.)
4) Remove the cable gland (4) and plain washer (5) and
rubber seal (6).
2. Wiring
1) Pass them through the cable (7) in the order of cable
ground (4), washer (5), rubber seal (6), and then insert
into the housing (2).
2) From the terminal block (3), loosen the screw (11), then
pass the lead wire (10) through, then again tighten the
screw (11).
Note 1) Tighten within the tightening torque of 0.5 N･m
+/-15%.
Note 2) Cable (7) external: φ6 to φ8 mm
Figure-1
3. Assembly
1) Passing through the cable (7), the cable gland (4),
plain washer (5), and rubber seal (6), housing (2) in
this order, and then connect with the terminal block (3).
After that, set the terminal block (3) on the housing (2).
(Push it down until you hear the click sound.)
2) Putting rubber seal (6), plain washer (5), in this order
into the cable introducing slit on the housing (2), then
further tighten the cable gland (4) securely.
3) Insert the gasket (8) or between the bottom part of
terminal block (3) and a plug attached to equipment,
and then screw (1) in from the top of the housing (2) to
tighten it.
Note 1) Tighten within the tightening torque of 0.5 N･m
+/-20%.
Note 2) Connector orientation can be changed by 180
degrees depending on how to assemble the
housing (2) and the terminal block (3).
Continuous Duty
VG342 Series
3 Port Solenoid Valve / Specific Product 2
Be sure to read before handling.
Caution
(4)
(5)
(6)
(11)
(9)
(10)
(7)
(8)
(1)
(2)
(3)