SMC Networks SJ 1000 Series User manual

Doc. No. SJ2000-OMM0001-B
Solenoid Valve
PRODUCT NAME
SJ1000/2000/3000 Series
MODEL/ Series

No. SJ2000-OMM0001-B
Contents
Contents ---------------------------------------------------------------------------------------------- 1
Safety Instructions ---------------------------------------------------------------------------------- 2,3
Design / Selection ----------------------------------------------------------------------------------- 4 to 6
Mounting -------------------------------------------------------------------------------------------- 6
Piping ------------------------------------------------------------------------------------------------ 6
Wiring ------------------------------------------------------------------------------------------------ 7
Lubrication ------------------------------------------------------------------------------------------ 7
Air Supply ---------------------------------------------------------------------------------------------- 7
Operating Environment ----------------------------------------------------------------------------- 8
Maintenance ------------------------------------------------------------------------------------------- 8
UL approved ---------------------------------------------------------------------------------------- 8
Specific Product Precautions --------------------------------------------------------------------- 9 to 15
Valve Construction ---------------------------------------------------------------------------------- 16 to 23
Trouble shooting ----------------------------------------------------------------------------------- 24,25
-1-

No. SJ2000-OMM0001-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: 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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No. SJ2000-OMM0001-B
Safety Instructions
Caution
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,whichever is first.*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 governed 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 governing that export
are known and followed.
Caution
SMC products are not intended for use as instruments for legal metrology.
Measurement instruments that SMC manufactures or sells have not been qualified by type approval tests
relevant to the metrology (measurement) laws of each country.
Therefore, SMC products cannot be used for business or certification ordained by the metrology
(measurement) laws of each country.
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- 4 -
No. SJ2000-OMM0001-B
Design / Selection
1. Confirm the specifications
Products represented in this instruction 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.
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 (such as the
installation of a cover or the restricting of access to the
product) to prevent potential danger caused by
actuator operation.
3. Intermediate stops
For 3-position closed center, it is difficult to make a
piston stop at the required position accurately due to
the compressibility of air.
Furthermore, since valves and cylinders are not
guaranteed for zero air leakage, it may not be possible
to hold a stopped position for an extended period of
time. Please contact SMC if it is necessary to hold a
stopped position for an extended period of time.
4. Effect of back pressure when using a
manifold.
When the air operated valve or single acting cylinder is
operated, they may malfunction due to the exhaustion
of other actuator. If back pressure is possible to be
present, use the valve with back pressure prevention
valve, or use air SUP./EXH. block assembly and EXH.
block disk to divide air exhaustion.
5. Holding pressure (including vacuum).
Since the valve are subject to air leakage, they cannot
be used for applications such as holding pressure
(including vacuum) in a pressure vessel.
6. Not suitable for use as an emergency
shut-off valve, etc.
The valves listed in this instruction 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.
7. Release of residual pressure
For maintenance and inspection purposes install a
system for releasing residual pressure. Especially in
the case of 3-position closed center valve, ensure that
the residual pressure between the valve and the
cylinder is released.
8. Operation for vacuum
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 supply a constant supply of vacuum. Failure to do
so may result in foreign matter sticking to the
adsorption pad or air leakage, causing the workpiece
to drop.
9. Regarding a vacuum switch valves and
vacuum release valves
If a non-vacuum valve is installed in the middle of a
piping system that contains a vacuum, the vacuum
condition will not be maintained. Use a valve designed
for use under vacuum conditions.
10. Double solenoid type
When using the double solenoid type for the first time,
actuators may travel in an unexpected direction
depending on the switching position of the valve.
Implement measures to prevent any danger from
occurring when operating the actuator.
11. 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.
12. 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 the valve with a
power saving circuit. In addition, it is possible to
shorten the energized time by using a valve with an
N.O. (normally open) specification.
・For applications such as mounting a valve in a control
panel, take the measure to keep the temperature not
to exceed valve specification.
Please mind it especially in case energizing more
than 3 adjacent stations in the same manifold for an
extended period of time or energizing bothAand B
coil of dual 3 port valve for an extended period of
time.
13. Do not disassemble the product of
make any modifications, including
additional machining.
Doing so may cause human injury and/or an
accident.
14. Resumption after a long period of
holding time
When resuming operation after a long period of
holding time, there are cases in which, regardless of
whether the product is in an ON or OFF state, there is
a delay in the initial response time due to adhesion.
Conducting several cycles of running-in operation will
solve this problem. Please consider implementing this
before resumption.
SJ1000/2000/3000 Series
Precautions for 4 Port Solenoid Valve 1
Be sure to read before handling. Refer to main text for detailed precautions on every series.
Warning

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No. SJ2000-OMM0001-B
Design / Selection
D
1. Precautions for 2-position double
solenoid valves
If a double solenoid valve is operated with momentary
energization, it should be energized for at least 0.1
second. However, depending on the piping conditions,
the cylinder may malfunction even when the double
solenoid valve is energized for 0.1 seconds or longer.
In this case, energize the double solenoid valve until
the cylinder is exhausted completely.
2. 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
3% or less of the rated voltage.
3. Surge voltage suppressor
1) The surge voltage suppressor built into the valve is
intended to protect the output contacts so that the
surge generated inside valve does not adversely affect
the output contacts. Therefore, if an overvoltage or
overcurrent is received from an external peripheral
device, the surge voltage protection element inside the
valve is overloaded, causing the element to break. In
the worst case, the breakage causes the electric circuit
to enter short-circuit status. If energizing continues
while in this state, a large current flows. This may
cause secondary damage to the output circuit, external
peripheral device, or valve, and may also cause a fire.
So, take appropriate protective measures, such as the
installation of an overcurrent protection circuit in the
power supply or a drive circuit to maintain a sufficient
level of safety.
2) If a surge protection circuit 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
approximately 1V.
4. Surge voltage intrusion
With non-polar type solenoid valves, at times of
sudden interruption of the loading power supply, such
as emergency shutdown, surge voltage intrusion may
be generated from loading equipment with a large
capacity (power consumption), and a solenoid valve in
a de-energized state may switch over (see Figure 1).
When installing a breaker circuit for the loading power
supply, consider using a solenoid valve with polarity
(with polarity protection diode), or install a surge
absorption diode between the loading equipment COM
line and the output equipment COM line (see Figure
2).
5. Operation in low temperature
conditions
It is possible to operate a valve in extreme
temperatures, as low as –10°C. Take appropriate
measures to avoid the freezing of drainage, moisture,
etc., in low temperatures.
SJ1000/2000/3000 Series
Precautions for 4 Port Solenoid Valve 2
Be sure to read before handling. Refer to main text for detailed precautions on every series.
Caution

- 6 -
No. SJ2000-OMM0001-B
Design / Selection
6. Operation for air blowing
When using a solenoid valve for air blowing, use an
external pilot type. Use caution because the pressure
drop caused by the air blowing can have an effect on
the internal pilot type valve when internal pilot type
valves and external pilot type valves are used on the
same manifold.
Additionally, when compressed air within the pressure
range of the established specifications is supplied to
the external pilot type valve’s port, and a double
solenoid valve is used for air blowing, the solenoids
should be energized when air is being blown.
7. Mounting orientation
Mounting orientation is free.
8. Initial lubrication of main valve
The initial lubricant (Grease) has already been applied
to the main valve.
Please consult with SMC, as there are some standard
valve products that use fluorine grease for food
processing equipment (NSF H-1).
9. For the pilot EXH. (PE) port
If the solenoid valve and the manifold’s pilot EXH (PE)
port is restricted extremely or blocked, abnormal
operation of the solenoid valve may occur.
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
activities.
When installing the products, allow access for
maintenance and inspection.
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 operated properly, stop
operation.
Check mounting conditions when air and power
supplies are connected. Initial function and leakage
tests should be performed 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. Refer to the Fittings and Tubing
Precautions for handling one-touch
fittings.
2. 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.
3. Winding of sealant 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 sealant tape is used,
leave 1 thread ridge exposed
at the end of the threads.
4. Closed center
For closed center, check the piping to prevent air
leakage from the piping between the valve and the
cylinder.
5. Piping to products
When piping to a product, avoid mistakes regarding the
supply port, etc.
1) When using SMC’s M3 or M5 fittings, follow the
procedures below to tighten them.
•Connection thread: M3
First, tighten by hand, then use a suitable wrench to
tighten the hexagonal portion of the body an
additional 1/4 turn. The reference value for the
tightening torque is 0.4 to 0.5 N·m.
•Connection thread: M5
First, tighten by hand, then use a suitable wrench to
tighten the hexagonal portion of the body an
additional 1/6 to 1/4 turn. The reference value for
the tightening torque is 1 to 1.5 N·m.
∗Excessive tightening may damage the thread portion
or deform the gasket and cause air leakage.
Insufficient tightening may loosen the threads or
cause air leakage.
2) When using a fitting other than an SMC fitting, follow
the instructions given by the fitting manufacturer.
6. Piping to products
When piping to a product, refer to the operation
manual to avoid mistakes regarding the supply port,
etc.
Warning
Caution
SJ1000/2000/3000 Series
Precautions for 4 Port Solenoid Valve 3
Be sure to read before handling. Refer to main text for detailed precautions on every series.
Caution

- 7 -
No. SJ2000-OMM0001-B
Wiring
1. The solenoid valve is an electrical
product. For safety, install an
appropriate fuse and circuit breaker
before use.
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 there is polarity, take
note of the following.
No diode to protect polarity.
If a mistake is mode regarding the polarity, damage
may occur to the diode in the valve, the switching
element in a control device or power supply equipment,
etc.
With diode to protect polarity.
If polarity connection is wrong, the valve will 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.
4. External force applied to the lead wire
If an excessive force is applied to the lead wire, this
may cause faulty wiring. Take appropriate measures
so that a force of 30 N or more is not applied to the
lead wire. When instructions are given in the Specific
Product Precautions, follow these specifications.
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 additives), ISO VG32. For details
about lubricant manufacturers’ brands, refer to the
SMC website. Additionally, please contact SMC for
details about class 2 turbine oil (with additives) ISO
VG32. Once lubricant is utilized within the system,
since the original lubricant applied within the product
during manufacturing will be washed away, please
continue to supply lubrication to the system. Without
continued lubrication, malfunctions could occur.
If turbine oil is used, refer to the Safety Data Sheet
(SDS) of the oil.
2. Lubrication amount
If the lubrication amount is excessive, the oil may
accumulate inside the pilot valve, causing malfunction
or response delay. So, do not apply a large amount of
oil. When a large amount of oil needs to be applied,
use an external pilot type to put the supply air on the
pilot valve side in the non-lube state.
This prevents the accumulation of oil inside the pilot
valve.
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 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.
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 gasses, 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
equipment. 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 5 μm 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 the 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 an excessive amount of carbon
powder is present, 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.
For compressed air quality, refer to the SMC Best
Pneumatics catalog.
Caution
Warning
Warning
Warning
SJ1000/2000/3000 Series
Precautions for 4 Port Solenoid Valve 4
Be sure to read before handling. Refer to main text for detailed precautions on every series.
Caution

- 8 -
No. SJ2000-OMM0001-B
Operating Environment
1. Do not use in an atmosphere containing 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. Note that the valve is not for
outdoor use.
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 it’s energized for a long period of time, make sure
the ambient temperature is within the specifications of
the valve.
1. Temperature of ambient environment
Use the valve within the range of the ambient
temperature specification of each valve. In addition,
pay attention when using the valve in environments
where the temperature changes drastically.
2. Humidity of ambient environment
•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.
1. Perform maintenance and inspection
according to the procedures indicated in
the operation manual.
If handled improperly, human injury and/or malfunction
or damage of machinery and equipment may occur.
2. Removal of equipment, and
supply/exhaust of compressed air
Before components are removed, first confirm that
measures are in place to prevent workpieces from
dropping, run-away equipment, etc. Then, cut off the
supply air and electric power, and exhaust all air
pressure from the system using the residual pressure
release function.
For the 3-position closed center, exhaust the residual
pressure between the valve and thecylinder. When the
equipment is operated after remounting or
replacement, first confirm that measures are in place
to prevent the lurching of actuators, etc. Then, confirm
that the equipment is operating normally. In particular,
when a 2-position double solenoid valve is used,
releasing residual pressure rapidly may cause the
spool valve to malfunction, depending on the piping
conditions, or the connected actuator to operate.
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 a manual override is operated, connected
equipment will be actuated.
Operate only after safety is confirmed.
5. If the volume of air leakage increases or
the valve does not operate normally, do
not use the valve.
Perform periodic maintenance on the
valve to confirm the operating condition
and check for any air leakage.
1. Drain flushing
Remove drainage from the air filters regularly.
2. Lubrication
In the case of rubber seals, once lubrication has been
started, it must be continued.
Use class 1 turbine oil (with no additives), VG32. If
other lubricant oil is used, it may cause a malfunction.
Please contact SMC for information on the suggested
class 2 turbine oil (with additives), VG32.
3. Manual override operation
When switching a double solenoid valve via the
manual override operation, instantaneous operation
may cause the malfunction of the cylinder. It is
recommended that the manual override be held until
the cylinder reaches the stroke end position.
When conformity to UL is required, the SI unit should
be used with a UL 1310 Class 2 power supply.
The SI unit is a ULapproved product only if they have
a mark on the body.
Maintenance
UL approved
Warning
Caution
Warning
Caution
SJ1000/2000/3000 Series
Precautions for 4 Port Solenoid Valve 5
Be sure to read before handling. Refer to main text for detailed precautions on every series.
Caution

No.SJ2000-OMM0001-B
Manual Override Switch Operation
For manual override operation, move the manual override switch to a
position where letters Aand B can be seen. [Manual override switch
release status (refer to the figure below)] Operation with the manual
override switch in a locked status can cause damage to the manual
override and air leakage, so be sure to release the manual override
switch before use.After manual override operation, lock the manual
switch for use (when the manual override of the push-turn locking
slotted type is locked, a manual override switch cannot be locked).
Manual Override Operation
When the manual override is operated, connected equipment will
be actuated. Confirm safety before operating.
When you operate the D type with a screw driver, turn it gently
using a precision screwdriver. [Torque: under 0.05 N·m] When you
lock the manual override of the D type, be sure to push it before
turning. [Load: 10 N or less] Turning without pushing can cause
damage to the manual override and trouble such as air leakage,
etc.
Valve with Switch
When turning OFF the valve using the switch, move it to the
position where the valve is locked. If the switch is at an improper
position and is energized, equipment connected to the valve could
be actuated. Also, if the switch is turned OFF on the valve in the
energized state, be careful because any actuators connected to a
single solenoid, a dual 3 port valve or a 3 position valve will
actuate.
Built-in Back Pressure Check Valve Type
1. Valves with built-in back pressure check valve is to protect the
back pressure inside a valve. For this reason, use caution the
valves with external pilot specification cannot be pressurized
from exhaust port [3/5(E)].As compared with the types which
do not integrate the back pressure check valve, C value of the
flow rate characteristics (sonic conductance) goes down. For
details, please contact SMC.
2. Do not switch valves whenA or B port is open to the
atmosphere, or while the actuators and air operated equipment
are in operation. The back pressure prevention seal may be
peeled off, which may cause air leakage or malfunctions. Use
caution especially when performing a trial operation or
maintenance work.
SJ1000/2000/3000series
Specific Product Precautions 1
Be sure to read this before handling.
。
Warning
Caution
Warning
Warning
Caution
-9-

No.SJ2000-OMM0001-B
Exhaust Restriction
Since the SJ series is a type in which the pilot valve exhaust joins
the main valve exhaust inside the valve, use caution, so that the
piping from the exhaust port is not restricted.
When Using a 4 Port Valve as a 3 Port Valve
■When using a 4 port valve as a 3 port valve
The SJ1000/2000/3000 series can be used as normally closed
(N.C.) or normally open (N.O.) 3 port valves by plugging one of
the cylinder ports 4(A) or 2(B). However, exhaust ports should
be left open. It is convenient when a double solenoid 3 port
valve is required.
Light/Surge Voltage Suppressor
■With power saving circuit
Compared to the standard products, power consumption is
reduced down to approx. 1/3 (in case of SJ3□60T) by cutting
the unnecessary wattage required to hold the valve in an
energized state. (Effective energizing time is over 67 ms at 24
VDC.)
With power saving circuit
SJ1000/2000/3000series
Specific Product Precautions 2
Be sure to read this before handling.
。
Caution
Caution
Caution
Caution
-10-

No.SJ2000-OMM0001-B
Working Principle
With the circuit of page 9, the current consumption, when holding,
is reduced to save energy. Please refer to the electric wave form
data below.
•When a power saving circuit is installed, a diode to prevent
reverse current is not available for 12 VDC spec. Therefore, use
caution not to connect in reverse.
•Be careful about the allowable voltage fluctuation since a
voltage drop of about 0.5 V occurs due to a transistor. (Refer to
the solenoid specifications of each valve for details.)
■Measures to prevent detours of surge voltage
When the DC power supply is shut off, by the emergency
breaking circuit for example, valve misoperation may occur due
to surge voltage produced by other electrical parts (such as
electromagnetic coils). Please take measures to prevent
surges from detouring to the valve (surge protection diode etc.),
or use a valve with diode to prevent reverse current (polar: Z
type).
However, surge countermeasures are provided on the serial
unit side of the serial type.
Light Indication
When equipped with light/surge voltage suppressor,
the light window turns orange
when solenoid a is energized,
and it turns green
when solenoid b is energized.
Changing the Connector Entry Direction
To change the connector’s entry direction, set the switch on the
top of the connector block to the FREE position, before turning
the connector. Make sure to set the switch back to the LOCK
position before connecting the connector. (When the switch is
difficult to slide, move the connector a little so that it will slide
easier.)
If an excessive force is applied on the connector in the LOCK
position, the connector block may be damaged.Also, using in
such a way that the connector floats in the FREE position, it may
cause the lead wire, etc. to break. Thus, refrain from using in
these ways.
Manifold Mounting
When attaching a manifold to a mounting surface, etc., with bolts,
if the entire bottom surface of the DIN rail contacts the mounting
surface in a horizontal mounting, it can be used by simply
securing both ends of the DIN rail. However, for any other
mounting method or for side facing and down facing, etc., secure
the DIN rail with bolts at uniform intervals using the following as a
guide: 2 to 5 stations at 2 locations, 6 to 10 stations at 3 locations,
11 to 15 stations at 4 locations, 16 to 20 stations at 5 locations, 21
to 25 stations at 6 locations, 26 to 30 stations at 7 locations and
more than 30 stations at 8 locations.
In addition, even in the case of a horizontal mounting, if the
mounting surface is subject to vibration, etc., take the same
measures indicated above. If secured at fewer than the specified
number of locations, warping or twisting may occur in the DIN rail
and manifold, causing trouble such as air leakage.
SJ1000/2000/3000series
Specific Product Precautions 3
Be sure to read this before handling.
。
Caution
Caution
-11-

No.SJ2000-OMM0001-B
Fitting Replacement
By replacing a valve’s fitting assembly, it is possible to change
the port size of the 4(A), 2(B), 1(P), and 3/5(E) ports. When
replacing it, pull out the fitting assembly after removing the clip
with a flat blade screw driver, etc. To mount a new fitting assembly,
insert it into place and then fully reinsert the clip.
Note 1) To change the port size of the 1(P), 3/5(E) ports into the
port sizes other than ø8 (straight), specify the change by
means of the manifold specification sheet.
Note 2) Be careful to avoid damage or contamination to the
O-rings, as this can cause air leakage.
Note 3) When removing a straight-type fitting from a valve, after
removing the clip, attach tubing or a plug (KJP-02,
KQ2P- ) to the One-touch fitting, and pull it out while
holding the tubing or plug. If it is pulled out while holding
the release button of the fitting (resin part), the release
button may be damaged.
Note 4) Be sure to turn off the power and stop the supply of air
before disassembly. Furthermore, since air may remain
inside the actuator, piping and manifold, confirm that the
air is completely exhausted before starting any work.
Note 5) While inserting a tubing into an elbow-type fitting, hold the
main body of the fitting by hand. Failure to do so will
exert an undue force on the valve or the fitting, resulting
in air leakage or damage.
Note 6) Each fitting assembly part no. contains 1 pc.Additionally,
when the piping is constructed in the same direction
using the elbow-type fitting, order the elbow-type and/or
long elbow-type fitting.
SJ1000/2000/3000series
Specific Product Precautions 4
Be sure to read this before handling.
。
Caution
-12-

No.SJ2000-OMM0001-B
One-touch Fittings
The pitch of the SJ series piping ports (A, B etc.) has been set
assuming the use of KJ series One-touch fittings.Therefore, when
using fittings with an M3 or M5 port block assembly, there may be
some interference between fittings, depending on the type and
size, so please use after checking dimensions in the catalog for
the pipe fitting being used.
1. Tube attachment/detachment for One-touch fittings
1) Tube attachment
(1) Take a tube having no flaws on its periphery and cut it
off at a right angle. When cutting the tube, use tube
cutters TK-1, 2 or 3. Do not use pinchers, nippers or
scissors, etc. If cutting is done with tools other than
tube cutters, the tube may be cut diagonally or
become flattened, etc., making a secure installation
impossible, and causing problems such as the tube
pulling out after installation or air leakage.
Also allow some extra length in the tube.
(2) Grasp the tube and push it in slowly, inserting it
securely all the way into the fitting.
(3) After inserting the tube, pull on it lightly to confirm that
it will not come out. If it is not installed securely all the
way into the fitting, this can cause problems such as
air leakage or the tube pulling out.
2) Tube detachment
(1) The 4(A) and 2(B) ports use the KJ series, so the tube
can be removed by pressing on part of the release
button. However, for the 1(P) and 3/5(E) ports, please
press the release button evenly as before.
(2) Pull out the tube while holding down the release button
so that it does not come out. If the release button is not
pressed down sufficiently, there will be increased bite on
the tube and it will become more difficult to pull it out.
(3) When the removed tube is to be used again, cut off the
portion which has been chewed before reusing it. If the
chewed portion of the tube is used as is, this can cause
trouble such as air leakage or difficulty in removing the
tube.
Other Tube Brands
1. When using other than SMC brand tube, confirm that the
following specifications are satisfied with respect to the
tube outside diameter tolerance.
1) Nylon tube within ± 0.1 mm
2) Soft nylon tube within ± 0.1 mm
3) Polyurethane tube within +0.15 mm, within –0.2 mm
Do not use tube which does not meet these outside diameter
tolerances. It may not be possible to connect them, or they may
cause other trouble, such as air leakage or the tube pulling out
after connection.
How to Use Plug Connector
When attaching and detaching a connector, first shut off the
electric power and the air supply. Also, crimp the lead wires and
sockets securely.
1. Connector attachment/detachment
•To attach a connector, hold the lever and connector unit
between your fingers and insert straight onto the pins of the
solenoid valve so that the lever’s pawl is pushed into the
groove and locks.
•To detach a connector, remove the pawl from the groove by
pushing the lever downward with your thumb, and pull the
connector straight out.
2. Crimping of lead wires and sockets
Peel 3.2 to 3.7 mm of the tip of lead wire, enter the core wires
neatly into a socket and crimp it with a special crimp tool. Be
careful so that the cover of lead wire does not enter into the
crimping part. (Please contact SMC for the dedicated crimping
tools.)
SJ1000/2000/3000series
Specific Product Precautions 5
Be sure to read this before handling.
。
Caution
Caution
Caution
-13-

No.SJ2000-OMM0001-B
How to Use Plug Connector
3. Lead wires with sockets attachment/detachment
•Attachment
Insert the sockets into the square holes of the connector (with A,
B, C, and N indication), and continue to push the sockets all the
way in until the lock by hooking into the seats in the connector.
(When they are pushed in, their hooks open and they are
locked automatically.) Next, confirm that they are locked by
pulling lightly on the lead wires.
•Detachment
To detach a socket from a connector, pull out the lead wire
while pressing the socket’ s hook with a stick having a thin tip
(approx. 1 mm). If the socket is used again, spread the hook
outward.
Plug Connector Lead Wire Length
Plug connector lead wires have a standard length of 300 mm,
however, the following lengths are also available.
Connector Assembly Part No.
Connector Assembly for Manifolds
(for Junction Common)
Using the connector assembly (for junction common) for solenoid
valves installed in the manifold reduces the labor involved in
wiring work because common wiring for all solenoid valves is
integrated into a single wire.
SJ1000/2000/3000series
Specific Product Precautions 6
Be sure to read this before handling.
。
Caution
Caution
Caution
-14-

No.SJ2000-OMM0001-B
How to Order
Indicate the part no. of the connector assembly with the part
numbers of the manifold and solenoid valves.
If the arrangement is complicated, please specify them by means
of the manifold specification sheet.
Note 1) Applications like connectors not wired to a valve is not
possible.
Note 2) For the solenoid valve, please designate “No
connector (MOZ)” for the connector type.
Note 3) Connector assembly with lead wire for place where the
signals are transmitted to the common wiring. (Only
the valves of first station and/or last station of
manifold are compatible to connector with lead wire
for common.)
Wiring Instructions for Connector Assembly
(for Junction Common)
If only connector assembly
(for junction common) is ordered,
please wire according to
the instructions in the diagram below.
For details on socket mounting,
please refer to
"How to Use Plug Connector"
on page 13.
One-touch Fittings
When fittings are used, they may interfere with one another
depending on their types and sizes. Therefore, the dimensions of
the fittings to be used should first be confirmed in their respective
catalogs. Fittings whose compliance with the SJ serise is already
confirmed are stated below. If the fitting within the applicable
range is selected, there will not be any interference.
Wire connection instructions
1. Strip 6.5 to 7.5 mm from the tip of the lead wire.
2. Loosen the terminal screws (slotted screws) of the power
supply terminal connectors, plug the core wire of the lead wire
into the square holes of the connector, tighten terminal screws
at the proper torque, and fasten them securely. (Gently pull the
lead wire and check that it is fastened.)
Precautions
・To remove the power supply terminal connector, pull it upward
as is. When mounting, push it in until it makes a snapping noise.
・When connecting wire, be careful because using lead wire that is
outside of compatible lead wire ranges, or that are tightened to
anything other than the proper torque, creates a risk of defective
contact and other problems.
Connector Assembly Part No.
(for Junction Common)
How to Wire to PC Wiring System Compliant Power
Supply Terminal
SJ1000/2000/3000series
Specific Product Precautions 7
Be sure to read this before handling.
。
Caution
Caution
Caution
-15-

No.SJ2000-OMM0001-B

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No.SJ2000-OMM0001-B
-17-

No.SJ2000-OMM0001-B
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No.SJ2000-OMM0001-B
-19-