SMC Networks ZQ Series Operation Manual page 8

○Handling
●
Mounting
- Tighten to the specified tightening torque.
If the tightening torque is exceeded, the mounting screws, brackets and the product can be damaged.
Insufficient torque can cause displacement of the product from its proper position and loosening of the mounting
screws.
- Ensure that the FG terminal is connected to ground when using a commercially available switch-
mode
power supply.
- Do not drop, hit or apply excessive shock to the product.
Otherwise damage to the internal parts of the product, solenoid valve and internal parts of the pressure switch
can occur, causing malfunction.
- Do not pull the lead wire forcefully, or lift the product by pulling the lead wire. (Tensile strength 35N or
less)
Hold the body when handling to avoid damaging the product.
The solenoid valve and the pressure switch will be damaged, leading to failure and malfunction.
- Eliminate any dust left in the piping by using a blast of air before connecting the piping to the product.
If dust is left in the piping, failure and malfunction can result.
- Do not insert metal wires or other foreign objects into the pressure port of the pressure sensor.
The pressure sensor will be damaged, leading to failure and malfunction.
- If the fluid may contain foreign matter, install and connect a filter or mist separator to the inlet.
Failure and malfunction can result.
Wiring (Including connecting/disconnecting of the connectors)
Do not pull hard on the lead wire, or lift the product by holding the lead wires (Tensile strength 35 N or
less).
In particular, never lift the product by the lead wire of the solenoid valve or the pressure switch when fittings and
piping are built in.
Otherwise damage to the solenoid valve or the internal parts of the pressure switch can result, causing
malfunction or causing the connector to come off.
- Avoid repeatedly bending, stretching or applying a heavy object or force to the lead wire.
Repetitive bending stress or tensile stress to the lead wire can cause the sheath of the wire to peel off.
If the lead wire can move, fix it near the body of the product.
The recommended bend radius of the lead wire is 6 times the outside diameter of the sheath, or 33 times the
outside diameter of the insulation material, whichever is larger.
Replace the damaged lead wire with a new one.
- Wire correctly.
Incorrect wiring can cause malfunction or breakage of the solenoid valve or the pressure switch/sensor.
- 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.
- Do not route wires and cables together with power or high voltage cables.
Route the wires (piping) of the solenoid valve or the pressure switch separately from power or high voltage
cables in order to avoid noise or surge entering the signal line from the power or high voltage line.
- 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.
- Design the system to prevent reverse current when the product is forced to operate for operational
check.
Depending on the circuit used, insulation may not be maintained when operation is forced, allowing reverse
current to flow, which can cause malfunction and damage to the solenoid valve or the pressure switch.
- 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.
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Doc. no. ZQ-OM00801-C