SMC Networks SJ3A6 Series User manual

Doc. No.SJ3000-OMM0001
3 Position 3 Port Solenoid Valve
for Vacuum Release Valve
PRODU T NAME
SJ3A6 Series
MODEL/ Series

SJ3000-OMM0001
Contents
Safety Instructions ---------------------------------------------------------------------------- 2, 3
Precautions on Design / Selection ------------------------------------------------------- 4, 5
Mounting ---------------------------------------------------------------------------------------- 5
Piping -------------------------------------------------------------------------------------------- 5
Wiring -------------------------------------------------------------------------------------------- 5
Lubrication -------------------------------------------------------------------------------------- 5
Air Supply --------------------------------------------------------------------------------------- 6
Operating Environment ---------------------------------------------------------------------- 6
Maintenance ------------------------------------------------------------------------------------ 6
Specific Product Precautions --------------------------------------------------------------- 7 to 11
Troubleshooting -------------------------------------------------------------------------------- 12
Remedy ------------------------------------------------------------------------------------------ 13
-1-

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SJ3000-OMM0001
Safety Instructions
These safety instructions are intended to prevent hazardous situations and/or equipment dama e.
These instructions indicate the level of potential hazard with the labels of “Caution,” “Warnin ” or “Dan er.”
They are all important notes for safety and must be followed in addition to International Standards (ISO/IEC),
Japan Industrial Standards (JIS)*1) and other safety re ulations*2).
*1) ISO 4414: Pneumatic fluid power -- General rules relatin to systems
ISO 4413: Hydraulic fluid power -- General rules relatin to systems
IEC 60204-1: Safety of machinery -- Electrical equipment of machines (Part 1: General requirements)
ISO 10218-1992: Manipulatin industrial robots -- Safety
JIS B 8370: General rules for pneumatic equipment.
JIS B 8361: General rules for hydraulic equipment.
JIS B 9960-1: Safety of machinery – Electrical equipment for machines. (Part 1: General requirements)
JIS B 8433-1993: Manipulatin industrial robots - Safety. etc.
*2) Labor Safety and Sanitation Law, etc.
Caution
Operator error could result in injury or equipment dama e.
Warning
Operator error could result in serious injury or loss of life.
Danger
In extreme conditions, there is a possibility of serious injury or loss of life.
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 operatin conditions, its compatibility with specific
equipment must be decided by the person who desi ns 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 referrin to its latest catalo
information, with a view to ivin due consideration to any possibility of equipment failure when confi urin the
equipment.
2. nly 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 includin 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.
The inspection and maintenance of machinery/equipment should only be performed after measures to prevent
fallin or runaway of the driven objects have been confirmed.
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.
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 iven specifications, or use outdoors or in a place exposed to
direct sunli ht.
2) Installation on equipment in conjunction with atomic ener y, railways, air navi ation, space, shippin ,
vehicles, military, medical treatment, combustion and recreation, or equipment in contact with food and
bevera es, emer ency stop circuits, clutch and brake circuits in press applications, safety equipment or other
applications unsuitable for the standard specifications described in the product catalo .
3) An application which could have ne ative effects on people, property, or animals requirin special safety
analysis.
4) Use in an interlock circuit, which requires the provision of double interlock for possible failure by usin a
mechanical protective function, and periodical checks to confirm proper operation.

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SJ3000-OMM0001
Safety Instructions
Caution
The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in manufacturin industries.
If considerin usin the product in other industries, consult SMC beforehand and exchan e specifications
or a contract if necessary.
If anythin is unclear, contact your nearest sales branch.
Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the followin “Limited warranty and Disclaimer” and “Compliance
Requirements”.
Read and accept them before usin the product.
Limited warranty and Disclaimer
The warranty period of the product is 1 year in service or 1.5 years after the product is delivered.*3)
Also, the product may have specified durability, running distance or replacement parts. Please
consult your nearest sales branch.
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.
Prior to using SMC products, please read and understand the warranty terms and disclaimers noted
in the specified catalog for the particular products.
*3)
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
When the product is exported, strictly follow the laws required by the Ministry of Economy, Trade and
Industry (Forei n Exchan e and Forei n Trade Control Law).

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SJ3000-OMM0001
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 compressed
air (including vacuum .
We do not guarantee against any damage if the product is used
outside of the specification range.
2. 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.
3. Not suita le 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.
4. Release of residual pressure
For maintenance purposes install a system for releasing
residual pressure.
5. Operation in a vacuum condition
Although this product is provided with the filter to avoid entering
of foreign matters from the inside of 2(B port, countermeasure
against suction of particles from the suction pad and exhaust
pad and foreign matters when the valve is used as relief valve.
6. Regarding a vacuum switch valve and a vacuum
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.
7. 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.
8. 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.
- For applications such as mounting a valve on a control panel,
incorporate measure to limit the heat radiation so that the
temperature will be high when a 3 station manifold.
9. Do not disassem le the product or make any
modifications, including additional machining.
It may cause human injury and/or an accident.
10. Safe designs should e developed, which account
for the possi ility of accidents resulting from a drop
in vacuum pressure due to power failure or trou le
with the air supply, etc.
If vacuum pressure drops and there is a loss of vacuum pad
adsorption force, workpieces being carried may fall, causing
human injury or damage to machinery. Sufficient safety
measures should be implemented, such as drop prevention, to
avoid any accidents.
11. Valve lock switch
SJ3A6 series manifold valve(relief valve with orifice does not
have the valve lock switch for connection. Before tightening
thread, ensure there is no gap between valves when mounting.
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 3% or less of the rated voltage.
2. Surge voltage suppressor
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 1 V.
3. 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 the 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 .
SJ3A6 Series
Precautions for 3 Position 3 Port Solenoid Valve ①
①①
①
Be sure to read efore handling.
Warning
Caution

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SJ3000-OMM0001
Design / Selection
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. Mounting orientation
Mounting orientation is free.
6. For information on related items, such as vacuum
equipment, refer to the caution sections in each
respective catalog.
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.
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
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. Preparation efore 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 1.5 to 2 thread ridges exposed
at the end of the threads
.
3. Connection of fittings
When screwing fittings into valves, tighten as follows.
(1 Follow the procedures below when installing an SMC fitting,
etc.
M5
After tightening the fitting by hand, use a wrench to tighten
the fitting an additional approximately 1/6 to 1/4 turn.
As a reference value, tightening torque is 1 to 1.5 N･m.
Note If tightened excessively, the thread of the product may
break or the gasket may deform. If tightened
insufficiently, the thread of the product may become
loose. In either case, air leakage can occur.
(2 Follow the procedure of the manufacture when fittings other
than SMC is used.
4. Piping to products
When piping to a product, refer to the operation manual to avoid
mistakes regarding the supply port, etc.
5. Be certain that there are no crushed areas in the piping
due to damage or ending.
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 there is polarity, take note of the following.
No diode to protect polarity:
If a mistake is made 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 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.
Lu rication
Lu rication
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.
SJ3A6 Series
Precautions for 3 Position 3 Port Solenoid Valve ②
②②
②
Be sure to read efore handling.
Caution
Warning
Caution
Caution
Warning

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SJ3000-OMM0001
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 gases, etc., as it
can cause damage or malfunction.
1. When extremely dry air is used as the fluid,
degradation of the lu rication properties in side the
equipment may occur, resulting in reduced relia ility
(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 ㎛ or smaller.
3. Take measures to ensure air quality, such as y
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 car on powder is seen, install a mist
separator on the upstream side of the valve.
If excessive carbon dust is generated by the compressor, it may
adhere to the inside of a valve and cause it to malfunction.
For compressed air quality, refer to SMC’s Best Pneumatics
catalog.
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 flamma le 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 su ject to heavy vi ration
and/or shock.
4. The valve should not e 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
possi le 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
am ient 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, connected equipment
will be actuated.
Operate after safety is confirmed.
5. Maintenance work
If handled improperly, compressed air can be dangerous.
Assembly, handling, repair and element replacement of
pneumatic systems should be performed by a knowledgeable
and experienced person.
6. Clean suction filters and silencers on a regular asis.
The performance of an ejector will deteriorate due to clogged filters
and silencers. High flow filters should be used, especially in dusty
locations.
1. Drain flushing
Remove drainage from the air filters regularly.
2. Lu rication
In the case of rubber seals, 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 ,
ISOVG32.
Warning
SJ3A6 Series
Precautions for 3 Position 3 Port Solenoid Valve ③
③③
③
Be sure to read efore handling.
Warning
Caution
Caution
Warning

- 7 -
SJ3000-OMM0001
Manual Override Operation
When the manual override is operated, connected equipment will
be actuated Confirm safety before operating
￭ Non-locking push type
Press in the direction of the arrow
￭ Push-turn locking slotted type
While pressing, turn in the direction of the arrow (90
o
clockwise)
When you operate the D type with a screwdriver, turn it gently
using a watchmaker’s 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
Light/surge Voltage Suppressor
￭ Non-polar type
￭ Polar type
￭ 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 )
- 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 valve for details )
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
ontinuous Duty
Hole diameter φ3 4
SJ3A6 Series
Specific Product Precautions 1
Be sure to read before handling.
Electric circuit diagram (with power saving circuit)
Warning
ブルー
Manual override
for solenoid A
Blue
Manual override
for solenoid B
Yellow
Solenoid A
Solenoid B
aution
Enlarged view of
manual override part
Manual override
for solenoid B
Yellow
Solenoid A
Solenoid B
Manual override
for solenoid A
Blue
Enlarged view of
manual override part
aution
aution
aution
Indicator light
Solenoid A
Solenoid B
A side: Orange
B side: Green

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SJ3000-OMM0001
hanging the onnector 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 rear 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
Fitting Assembly 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
heat screwdriver, 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 φ8 (straight), specify the change by
means of the manifold specification sheet
Note 2) Be careful to avoid damage or contamination to the
O-rigs, as this can cause air leakage
Note 3) Be sure to turn off the power and stop the supply of air
before disassembly. Furthermore, since air may remain
inside piping and manifold, confirm that the air is
completely exhausted before starting any work.
Note 4) While inserting a tubing into an elbow-type fitting
assembly, hold the main body of the assembly by hand.
Failure to do so will exert an undue force on the valve or
the fitting assembly, resulting in air leakage or damage.
If there are situations such as filter clogging, a drop in suction
force, or slow response time, stop operation and replace the filter
1 Using a precision driver, remove the filter assembly from the
main unit
2 Turn the filter guide by hand and remove
3 Replace the filter and gently hand tighten the filter guide At
this time, check that there is no foreign matter on the O-ring of
the filter assembly
4 Return the filter assembly to the main unit
(Tightening torque: 0 12 N・m)
Filter replacement instructions
FREE
LO K
SJ3A6 Series
Specific Product Precautions 2
Be sure to read before handling.
aution aution
aution
Filter
O
-
ring
Notch in screw
Filter guide
Clip
O-ring One-touch fitting
(Straight)

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SJ3000-OMM0001
One-touch Fittings
1. Tube attachment/detachment for one-touch fittings
1) Attaching of tubing
(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, there
is the danger that 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,
(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) Detaching of tubing
(1) Press the release bush to the end with pressing the collar
evenly
(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 Tubing Brands
1. When using tube other than SM brand, confirm the
following specifications are satisfied with respect to
the outside diameter tolerance of the tube.
1) Nylon tubing within +/-0 1mm
2) Soft nylon tubing within +/-0 1mm
3) Polyurethane tubing within +0 15mm, within -0 2mm
Do not use tubing which does not meet these outside diameter
tolerances It may not be possible to connect them, or they may
cause other troubles, such as air leakage or the tube pulling out
after connection
How to Use Plug onnector
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. Attaching and detaching connectors
- 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. rimping 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 (Crimping tool: Model no DXT170-75-1)
3. Attaching and detaching lead wires with sockets
- Attaching
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
- Detaching
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
SJ3A6 Series
Specific Product Precautions 3
Be sure to read before handling.
aution
aution
aution
0 2 to 0 33mm
2
Max cover diameter: φ1 7mm

- 10 -
SJ3000-OMM0001
Plug onnector Lead Wire Length
Plug connector lead wires have a standard length of 300 mm,
however, the following lengths are also available
SJ3000-46-D-


Lead wire length
Without lead wire : SJ3000-46-D-N
(Connector, Socket x 3 pcs only)
How to Order
Include the connector assembly part number together with the
part number for the plug connector’s solenoid valve without
connector
(Example) Lead wire length 2000 mm
SJ3A6N-5MOZ
SJ3000-46-D-20
onnector Assembly for Manifolds (for Junction ommon)
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
Lead wire length
SJ3000-46-D -


For junction common
How to Order
Indicate the part no of the connector assembly for the manifold
and solenoid valve
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 )
(Example)
SS3J3-V60-04U ----- 1 set
∗SJ3A6N-5MOZ ----- 4 sets
∗SJ3000-46-D ------- 1 set
(Connector assembly for single solenoid)
∗SJ3000-46-DC ----- 3 sets (Connector assembly for single solenoid)
(for junction common)
The asterisk denotes the symbol for assembly Prefix it to the
part nos of the solenoid valve, etc
onnector Assembly Part No.
onnector Assembly Part No.(for Junction ommon)
SJ3A6 Series
Specific Product Precautions 4
Be sure to read before handling.
Nil 300mm
6 600mm
10 1000mm
15 1500mm
20 2000mm
25 2500mm
30 3000mm
50 5000mm
Nil 300mm
6 600mm
10 1000mm
15 1500mm
20 2000mm
25 2500mm
30 3000mm
50 5000mm
Connector assembly
SJ3000-46-D
Common wiring
Vacuum release valve
with restrictor
SJ3A6N-5MOZ
Connector assembly
(for junction common)
SJ3000-46-DC
aution
aution

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SJ3000-OMM0001
Wiring Instructions for onnector Assembly (for Junction ommon)
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 the back page 9
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
How to Wire to P Wiring System ompliant Power Supply Terminal
SJ3A6 Series
Specific Product Precautions 5
Be sure to read before handling.
aution
Common wiring
Socket
Insert the socket into the connector (N)
of the neighboring solenoid valve
aution

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SJ3000-OMM0001
TROUBLESHOOTING
Leakage
Vacuum pressure or release
pressure leaks out from
vacuum pad port
Air leaks through pilot
e haust port of pilot valve
④
⑨
⑤
⑥
⑩
Foreign matter caught in air seat of pilot valve
Foreign matter caught in core of pilot valve
Air leaks through gasket Insufficient bolt tightening
Foreign matter caught in armature
Coil splashed by water
Burnt coil
Intrusion of foreign matter
Spool has not completely shifted
①
②
③
④
E cessive amount of lubricant
Higher voltage or wrong coil used ⑦
⑤
⑥
Faulty wiring
Poor contact at contactor wire or connection part
Blown fuse or disconnection lead wire
Poor seal on actuator (cylinders, etc.) side
Faulty operation Pilot valve is not operated
Though pilot valve does
shift, but main valve will not
shift or will be sluggish.
Disconnection coil wire
⑪
Should any trouble be found during operation, trace the source of the trouble in the following order and take corrective action.
Trouble phenomenon Cause e pected Remedy
⑧
Fall of pilot pressure
Swelled out " spool ass'y " ring
Abrasion "spool ass'y" ring
⑫

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SJ3000-OMM0001
Remedy
④
③
②
①
No. Remedy
⑤
⑥
･When a large quantity of drain is given and cannot carry out drain omission surely, install either an
auto-drain or a dryer.The valve should be replaced.
･If wrong oil is used, completely air blow to remove oil, and replace valve. After valve is replaced,
use turbine oil class 1 (ISO VG32).
Regulate pressure so that pilot pressure will fall within operating pressure range during operation.
Reduce the amount of lubricant to the degree that no oil splashes out of the vacuum pad port.
Check voltage. Replace valve (pilot valve).
⑨
⑧Protect the valve so that water does not splash the coil. Replace valve (pilot valve).
In case of intrusion of foreign matter, to remove foreign matter by air blow of piping and then replace
valve.
⑩
⑪
In addition, in the case of trouble, please send it back to the supplier for repair or replacement.
1. Voltage out of rated voltage has been used.
If no improvement is achieved in spite of the above countermeasure, inside of the valve may have some
abnomality. In this case, stop using the valve immediately.
If any of followings are carried out, inside of the valve may have some failure. In this case, stop using
the valve immediately.
2. Oil other than the specified one has been lubricated.
7. Prohibited way of using the valve which is written at "Precautions" section in this operation manual
3. Lubrication has been stopped intermediately, or lubrication was suspended temporary.
4. Water splashed directely.
5. Strong impact was given.
6. Alien substance such as drain and particle got into. Drain or garbage invaded a valve.
Replace part.
Re-wire correctly.
was carried out e cluding above-mentioned.
Replace valve.
Replace part or re-wire positively.
Repair or replace actuators.
After stopping air and re-tighten the bolts.
⑫
⑦

SJ3000-OMM0001
Record of changes
1st printing MY
4-14-1, Sotokanda, hiyoda-ku, Tokyo 101-0021 JAPAN
Tel: + 81 3 5207 8249 Fax: [phone]
URL http://www.smcworld.com
Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.
© 2008 SM orporation All Rights Reserved