SMC Networks DXT1215 Series Instruction Manual page 2

DXT1215-TF222-009EN
6 Maintenance
6.1 General maintenance
Caution
• Not following proper maintenance procedures could cause the product
to malfunction and lead to equipment damage.
• If handled improperly, compressed air can be dangerous.
• Maintenance of pneumatic systems should be performed only by
qualified personnel.
• Before performing maintenance, turn off the power supply and be sure
to cut off the supply pressure. Confirm that the air is released to
atmosphere.
• After installation and maintenance, apply operating pressure and
power to the equipment and perform appropriate functional and
leakage tests to make sure the equipment is installed correctly.
• If any electrical connections are disturbed during maintenance, ensure
they are reconnected correctly and safety checks are carried out as
required to ensure continued compliance with applicable national
regulations.
• Do not make any modification to the product.
• Do not disassemble the product, unless required by installation or
maintenance instructions.
• 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.
• Operate the valve at least once every 30 days.
7 Limitations of Use
7.1 Limited warranty and disclaimer/compliance requirements
Refer to Handling Precautions for SMC Products.
Warning
7.2 Effect of energy loss on valve switching
The use of 2-position single valves with air returned or air/spring returned
spools has to be carefully considered.
Energy source status Single solenoid
Air supply present, electrical Spool returns to the off position by air and
supply cut spring force
Electrical supply present, air Spool stops moving after air pressure cut
supply cut (Position cannot be defined)
Table 4.
Note) Applies to when the spool is at the end position and at an intermediate
position.
7.3 Holding of pressure
Since valves are subject to air leakage, they cannot be used for
applications such as holding pressure (including vacuum) in a system.
7.4 Cannot be used as an emergency shut-off valve
This product is not designed for safety applications such as an
emergency shut-off valve. If the valves are used in this type of system,
other reliable safety assurance measures should be adopted.
7.5 Safety relays or PLC
If a safe output from a safety relay or PLC is used to operate this valve,
please contact SMC.
Caution
7.6 Leakage voltage
Ensure that any leakage voltage caused by the leakage current when the
switching element is OFF causes ≤ 3% of the rated voltage across the
valve.
7.7 Low temperature operation
Unless otherwise indicated in the specifications for each valve, operation
is possible to -10˚C, but appropriate measures should be taken to avoid
solidification or freezing of drainage and moisture, etc.
7.8 3 port specification (DXT1215T-5U-01-X1)
• The 3-port specification is a specification with the 2(B) port plugged
and closed. The 3(EB) port should be kept open for pilot exhaust.
• When one of the cylinder ports 4(A) or 2(B) is closed with a plug and
used as a 3-port valve, the surface temperature of the plug may rise
due to adiabatic compression. Therefore, we recommend the use of a
screw-in metal plug instead of a plastic plug with one-touch fittings.
Figure 7.
8 Product Disposal
This product shall not be disposed of as municipal waste. Check your
local regulations and guidelines to dispose this product correctly, in order
to reduce the impact on human health and the environment.
9 Contacts
Refer to www.smcworld.com or www.smc.eu for your
distributor/importer.
URL : https:// www.smcworld.com (Global) https:// www.smc.eu (Europe)
SMC Corporation, 4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021, Japan
Specifications are subject to change without prior notice from the manufacturer.
© 2022 SMC Corporation All Rights Reserved.
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