Document No.ZL-OM01001
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Electrical wiring
1. Use the specified voltage. Otherwise failure or malfunction can occur.
2. Do not exceed the specified maximum allowable load. Otherwise it can cause damage or
shorten the life of the product.
3. Design the product to prevent reverse current when the circuit is opened or the product is
forced to operate for operational check. Reverse current can cause malfunction or damage the
product.
4. Do not pull the lead wire forcefully, or lift the product by the lead wire (Lead wire tensile
strength: within 30N). Hold the product body when handing.
5. Avoid repeatedly bending or stretching the lead wires, or placing a heavy load or applying force
to them. If the bending stress and tensile force is repeatedly applied to the lead wires, sheath
might be removed. If the lead wire can move, fix it near the body of the product. The
recommended bending radius of the lead wire is R40 mm or more. For details, please contact
SMC. Replace the damaged lead wire with a new one.
6. Incorrect wiring can damage the switch and cause malfunction. Connections should be done
while the power supply is turned off.
7. Do not perform wiring while the power is on. Otherwise damage to the solenoid valve or the
internal parts of the pressure switch/sensor can result, causing malfunction.
8. Do not attempt to insert or pull out the connector from the pressure switch while the power is on.
This may cause switch output malfunction.ć
9. Malfunctions stemming from noise may occur if the wire is installed in the same route as that of
power or high-voltage cable. Wire the pressure switch independently.
10. Confirm proper insulation of wiring. Poor insulation (interference with other circuits, poor
insulation between terminals etc.) can apply excessive voltage or current to the solenoid valve
or the pressure sensor, causing damage.
11. Keep wiring as short as possible to prevent interference from electromagnetic noise and surge
voltage. Do not use a cable longer than 10 m. Wire the DC (-) line (solenoid valve: black,
pressure switch: blue) as close as possible to the power supply.
12. Do not use the product in an area where surge is generated. When there are machines or
equipment that generate large surge near the pressure switch (magnetic type lifter, high
frequency inductive furnace, motor, etc.), this can result in deterioration and damage of the
internal elements. Take measures against the surge sources, and prevent the lines from
coming into close contact.
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