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

-1-

- 2 -

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

indicates a hazard with a low level of risk which, if not avoided, could result

in minor or moderate injury.

Warning

indicates a hazard with a medium level of risk which, if not avoided, could

result in death or serious injury.

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.

- 3 -

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.

- - 4 - -

- 4 -

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

- - 5 - -

- 5 -

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

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

Warning

- - 6 - -

- 6 -

VG300∗∗−OMH0002-B

Piping

3. Connection of fittings

When screwing fittings into valves, tighten as follows.

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

Caution

- - 7 - -

- 7 -

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

- - 8 - -

- 8 -

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. 2 (-)

N.C.

N.O.

External pilot

M4X0.7

With DIN terminal

block With terminal

block

Ground

- - 9 - -

- 9 -

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)

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