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VP500-TF2Z495EN-A
3 Installation - continued
Gland nut
Tightening torque
Holding screw
1.65 to 2.5 N∙m
Tightening torque
0.4 N∙m
Washer
Grommet
(Rubber)
Housing
(Light mounting
(Voltage symbol)
location)
Terminal
Terminal screw
Notch
(3 locations)
Tightening torque
0.2 to 0.25 N∙m
Figure 15.
Warning
The ground terminal is connected to the coil assembly only and does not
provide a protective earth for the body of the valve.
Changing the entry direction
After separating the terminal block and housing, the cord entry can be
changed by attaching the housing in the desired direction (4 directions at
90° intervals).
* When equipped with a light, be careful not to damage the light with the
cord's lead wires.
Precautions
Plug in and pull out the connector vertically without tilting to one side.
Compatible cable
Cord O.D.: Ø3.5 to Ø7
(Reference) 0.5 mm², 2-core or 3-core, equivalent to JIS C 3306
3.8.2 Omron limit switch: conduit type
3.8.2.1 Limit switch screw tightening torque
Screw position
Tightening torque [N·m]
Terminal screw
0.6 to 0.8
Cover clamping screw
0.5 to 0.7
Conduit mounting connection
1.8 to 2.2
Table 13. Conduit terminals tightening torque
3.8.2.2 Wiring
• When connecting to the terminals via insulating tube and M3.5 crimp
terminals, arrange the crimp terminals as shown below so that they do
not rise up onto the case or the cover. Application lead wire size:
AWG20 to AWG18 (0.5 to 0.75 mm²)
Tolerance ±2 mm
Figure 16.
• Do not push crimp terminals into gaps in the case interior. Doing so
may cause damage or deformation of the case.
• Use crimp terminals not more than 0.5 mm in thickness. Otherwise,
they will interfere with other components inside the case. The crimp
terminal shown below are not more than 0.5 mm thick.
Manufacturer
Type
Wire size
FV0.5-3.7 (F type)
J.S.T.
AWG20 (0.5 mm²)
V0.5-3.7 (straight type)
J.S.T. is a Japanese manufacturer.
Table 14.
3 Installation - continued
L
I
F
t: 0.5 mm
dz dia.: 3.7 mm
D dia.: 2.9 mm
B: 6.6 mm
L: 19 mm
B
D dia.
F: 7.7 mm
I: 8.0 mm
dz dia.
Crimp terminal
Terminal screw
Correct
Incorrect
Figure 17.
3.8.2.3 Conduit opening
• Connect a recommended connector to the opening of the conduit and
tighten the connector to the specified torque. The case may be
damaged if an excessive tightening torque is applied.
• Use a cable with a suitable diameter for the connector.
3.8.2.4 Recommended connectors
• Use connectors with screws not exceeding 9 mm, otherwise the
screws will protrude into the case interior, interfering with other
components in the case.
• The connectors listed in the following table have connectors with
thread sections not exceeding 9 mm. Use the recommended
connectors to ensure conformance to the stated IP level.
Applicable
Size
Manufacturer
Model
cable diameter
LAPP
ST-PF1/25380-1002
6.0 to 12.0 mm
G 1/2
OA-W1609
7.0 to 9.0 mm
Ohm Denki
OA-W1611
9.0 to 11.0 mm
LAPP is a German manufacturer.
Ohm Denki is a Japanese manufacturer.
Table 15. Recommended conduit connectors
• Use LAPP connectors together with seal packing (JPK-16, GP-13.5,
GPM20, or GPM12), and tighten to the specified tightening torque.
Seal packing is sold separately.
3.8.3 Omron limit switch: M12 connector type
Pin No. (Terminal No.)
Figure 18.
Orientation of the M12 connector is not guaranteed. Only a straight
connector should be used.
3.8.4 Rockwell Automation limit switch: M12 connector type
Figure 19.
3.8.4.1 Socket tightening
• Turn the socket connector screws by hand and tighten until no space
remains between the socket and the plug.
3 Installation - continued
• Make sure that the socket connector is tightened securely. Otherwise,
the rated degree of protection may not be maintained and vibration
may loosen the socket connector.
• Orientation of the M12 connector is not guaranteed. Only a straight
connector should be used.
3.9 Residual voltage
Caution
• If a Zener diode or varistor voltage suppressor is used, the suppressor
arrests the back EMF voltage from the coil to a level in proportion to
the rated voltage.
• Ensure the transient voltage is within the specification of the host
controller.
• Contact SMC for the Zener diode or varistor residual voltage.
3.10 Countermeasure for surge voltage
Caution
• At times of sudden interruption of the power supply, the energy stored
in a large inductive device may cause non-polar type valves in a de-
energised state to switch.
• When installing a breaker circuit to isolate the power, consider a valve
with polarity (with polarity protection diode), or install a surge
absorption diode across the output of the breaker.
3.11 Extended periods of continuous energization
Warning
• If a valve is continuously energized for an extended period of time, the
temperature of the valve will increase due to the heat generated by the
coil assembly.
4 How to Order
• Refer to catalogue for "How to Order" of standard products "-X536/8,
X555".
• Refer to product drawing for special products "-X585", "-X###" and "-
##" other than standard "-X536/8, X555".
Note) The 25A- variants are compatible for use in the secondary battery
manufacturing environment. These variants are copper and zinc
free and suitable for use with low dew point air supplies (-70°C).
Contact SMC for more information.
5 Outline Dimensions
• Refer to catalogue for dimensions of standard products "-X536/8,
X555".
• Refer to product drawing for special products "-X585", "-X###" and "-
##" other than standard "-X536/8, X555".
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.
Warning
• To avoid any hazard created by air trapped between the check valve
and pilot valve, energise and de-energise the solenoid valve several
times with no air supply to port 1 or to the external pilot port.
6 Maintenance - continued
6.2 Replacement parts
Warning
• Under no circumstances attempt to change the solenoid of the pilot
valve as this is an integral part of the valve and doing so will negate
any such SMC warranty.
• Do not attempt to replace the limit switches. M4 limit switch retaining
screws are secured into position with adhesive, do not remove.
• There are no replaceable parts on these safety products.
6.3 Periodic testing
• The product should be tested for proper operation of the safety function
once per month or whenever considered necessary for the purposes
of the end user. The test should consist of operation of the safety
system and observation of the following:
When the connected control system is energising the solenoids:
• Check that the solenoid indicator lights are illuminated.
• Check that the connected downstream system is properly
pressurised.
• Check that the switch contacts are open.
• For duplex valve assemblies check that when only one channel of
the system (one of the solenoids) is energised the protected system
does not become pressurised. Check this for both channels.
When the connected control system is not energising the solenoids:
• Check that the solenoid indicator lights are not illuminated.
• Check that the connected downstream system is properly vented to
atmosphere and ensure that the condition of the silencers is not
causing an extension of the vent time.
• Check that the switch contacts are closed.
• For duplex valve assemblies check that when only one channel of
the system (one of the solenoids) is de-energised the protected
system is vented to atmosphere. Check this for both channels.
Warning
The specification of the valve requires the valve to be cycled (energised
and de-energised) at least once per week.
6.4 Silencers
Warning
• Ensure that any silencers fitted to the valve remain clean and
uncontaminated in operation because blockage will affect the safety
function.
• These silencers are to be fitted by the end user during installation.
• Examine any silencers at least once per month and more frequently if
necessary due to the nature of the application environment.
6.5 Troubleshooting guide
Symptom
Possible fault
Action
Check pilot solenoid
indicator (light) is
Pilot valve is not energised
illuminated and that voltage
Valve does not open
is within specification
Supply pressure is too low Check supply pressure
Pilot valve has failed
Replace the entire unit
Pilot valve remains
Check pilot solenoid
energised
indicator (light)
Pilot valve is jammed
Replace the entire unit
Valve does not close
Main valve is jammed
Replace the entire unit
Supply pressure is too high Check supply pressure
Switch contacts do not open Switch has failed
Replace the entire unit
Switch contacts do not close Switch has failed
Replace the entire unit
Valve operation is noisy or
Increase supply pressure
Supply flow is inadequate
erratic
and/or flow
Increase supply pressure
Supply flow is inadequate
and/or flow.
Valve is slow to pressurise
protected system
Check 'Valve does not
One channel of valve is
open' symptoms above
not functioning
Inadequate flow area in
Revise flow in protected
protected system
system
Valve is slow to vent
protected system
Check 'Valve does not
One channel of valve is
close' symptoms above
not functioning
Note)
If one channel fails in a duplex valve, replace the entire unit.
Table 16.
Page 4 of 5
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