SMC Networks SX3000 Series, Operation Manual

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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. 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. Intermediate stops
For 3-position closed center type, 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. Effects of back pressure when using a manifold
Use caution when valves are used on a manifold, because an
actuator may malfunction due to back-pressure.
Especially when using a 3-position exhaust center valve or
single acting cylinder, take appropriate measures to prevent
malfunction by using it with an individual EXH spacer assembly
or an individual exhaust manifold.
5. 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.
6. 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.
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 type, ensure that the residual pressure
between the valve and the cylinder is released.
8. 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.
9. 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 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 assembly. This will likely adversely
affect the performance of the valve and any nearby peripheral
equipment. It is possible to shorten the energized time by
making a valve with an N.O. (normally open) specification.
- 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.
13. Do not disassemble the product or make any
modifications, including additional machining.
Doing so may cause human injury and/or an accident.
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 seconds.
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 when 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.
Warning
SX3000/5000/7000 Series
Precautions for 5 Port Solenoid Valve 1
Be sure to read before handling.
Caution
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SX3000-OMM0002-B