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SJ1000/2000/3000/4000
Specific Product Precautions 2
Be sure to read this before handling the products. Refer to the back cover for safety instructions.
For 3/4/5-port solenoid valve precautions, refer to the "Handling Precautions for SMC Products"
and the "Operation Manual" on the SMC website: https://www.smcworld.com
Used as a 3-Port Valve
Caution
When using a 4-port valve as a 3-port valve
The SJ1000/2000/3000/4000 series can be used as normally
closed (N.C.) or normally open (N.O.) 3-port valves by closing
one of the cylinder ports 4(A) or 2(B) with a plug. However,
they should be used with the exhaust ports kept open. They
are convenient at times when a double solenoid type 3-port
valve is required.
Plug position
2(B) port
Type of actuation
N.C.
(A)4
2(B)
Single
(R1)5
1
3(R2)
(P)
(A)4
2(B)
Double
(R1)5
1
3(R2)
(P)
Light /Surge Voltage Suppressor
Caution
Non-polar type
Single solenoid
COM
(+, –)
Varistor
SOL.a
(–, +)
LED
(Red)
Positive common
Single solenoid
Polarity protection diode
COM
(+)
LED
(Red)
[SOL.a]
(–)
Negative common
Single solenoid
Polarity protection diode
COM
(–)
LED
(Red)
[SOL.a]
(+)
139
4(A) port
N.O.
(A)4
2(B)
(R1)5
1
3(R2)
(P)
(A)4
2(B)
(R1)5
1
3(R2)
(P)
Double solenoid, 3-position type
SOL.b
LED (Green)
(–, +)
Varistor
COM
(+, –)
Varistor
SOL.a
(–, +)
LED
(Red)
Double solenoid, 3-position type
Polarity protection diode
[SOL.b]
(–)
LED
(Green)
COM
(+)
LED
(Red)
[SOL.a]
(–)
Double solenoid, 3-position type
Polarity protection diode
[SOL.b]
(+)
LED
(Green)
COM
(–)
LED
(Red)
[SOL.a]
(+)
Series
Continuous Duty
Caution
If a valve is energized continuously for long periods of time, the
rise in temperature due to heat-up of the coil assembly may
cause a decline in valve performance, reduce the service life, or
have adverse effects on peripheral equipment. If the valve is en-
ergized continuously for long periods of time, be sure to use a
valve with power-saving circuit (continuous duty type). In particu-
lar, if three or more adjacent stations on the manifold are ener-
gized simultaneously for extended periods of time or if the valves
on A side and B side are energized simultaneously for long peri-
ods of time, take special care as the temperature rise will be
greater.
If the continuously energized time exceeds three hours, please
contact SMC.
With power-saving circuit
Power consumption is decreased to approx. 1/3 (for
SJ3m60(A)T and SJ4m60T) compared with the standard mod-
el by reducing the wattage required to hold the valve in an en-
ergized state. (Effective energizing time is over 67 ms at 24
VDC.)
Electric circuit diagram (with power-saving circuit)
In case of positive common, single solenoid
(+)
i2
(–)
i1: Inrush current, i2: Holding current
Polarity protection diode
Not available for the 12 VDC specification
In case of negative common, single solenoid
(–)
i2
i1
(+)
i1: Inrush current, i2: Holding current
Polarity protection diode
Not available for the 12 VDC specification
LED
i1
LED
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