Pneumatic Clean Series

635Pressure Switch/Common Precautions 1Be sure to read before handling. Refer to pages 7 to 16 of Front matter for safety instructionsand common precautions for clean series. Refer to the main text for precautions for each series.WarningDesigh and SelectionqOperate the switch only within the specified supply voltage limits.Use of the switch outside the range of the specified voltage cancause not only malfunction and damage to the switch but alsoelectric shocks and fire.wNever use a load exceeding the maximum load capacity.A load exceeding the max. load specification can lead toimmediate damage to the switch or shorten its operating lifespan considerably.eDo not use a load that generates surge voltage.Although the output circuit of the switch is provided with surgeprotection, repeated application of surge voltages can damage theswitch.When directly driving a surge generating load such as a relay orsolenoid valve, use a switch with build-in surge absorbing elements.rThe variety of compatible fluids differ amongproducts. Be sure to verify the process medium.The switch does not have an explosion proof construction. Donot use flammable gas or fluid to prevent possible fire hazard.It may cause disaster of fires.tBe sure to observe the set pressure range and themaximum operating pressure.Operation under pressure out of the specified range can causemalfunction.The switch may be damaged if it is subjected to higherpressures than its design parameters.WarningMountingqIf air leakage is present or increasing or the equipment isnot operating properly, do not continue to use theequipment.Verify proper installation after air and power are connected.The switch should be checked for proper operation andpossible air leaks after the initial installation, repair or reform.wMount switches using the proper tigntening torque.When a switch is tightened beyond the specified tighteningtorque range, the mounting screws, mounting brackets orswitch may be damaged.Insufficient tightening may allow the connecting thread portionto come loose.Connecting thread: M5, Rc, NPT, NPTFWarningWiringqVerify the color and terminal number when wiring.Incorrect wiring can cause the switch to be damaged ormalfunction. Verify the colors and terminal numbers in theoperation manual when wiring.wDo not apply repeated bending stress or stretchingforce to the lead wire.Disconnection may result from wiring that applies repeatedbending stress or stretching force to lead wires. Replace anylead wire that is damaged and can possibly cause malfunction.eConfirm proper insulation of wiring.Make sure that there is no faulty wiring insulation (Contact withother circuits, ground fault, improper insulation betweenterminals, etc.). Damage may be caused due to excess currentflow into the switch.WarningWarningEnvironmentqNever use in an atmosphere with explosive gases.The switch does not have an explosion proof construction.Never use the switch in an environment with explosive gasesas it may lead to disaster of explosion.MaintenanceqVerify proper operation of the swtich on a regular basis.Unexpected malfunctions or a mistake in operation can causepossible danger.wBe careful when using the equipment in an interlockcircuit.When using the equipment in an interlock circuit, make thecircuit multiplex to be prepared for failure as well as conductperiodical inspection to confirm normal operation.ThreadM51/81/43/8Appropriate tightening torque Nm1/6 turn after manual tightening7 to 912 to 1422 to 24eApply a wrench to the metal flats of the main housing integrated withpiping when installing the pressure switch onto the system piping.Never apply a wrench to the resin part of the main housing ofthe switch. It may cause the switch to be damaged.616