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Precautions for Safe Use

If the Switch is to be used as a switch in an emergency stop circuit or in a safety circuit for preventing accidents resulting in injuries or deaths, use a Switch with a direct opening mechanism, use the NC contacts with a forced release mechanism, and set the Switch so that it will operate in direct opening mode.
For safety, install the Switch using one-way rotational screws or other similar means to prevent it from easily being removed. Protect the Switch with an appropriate cover and post a warning sign near the Switch to ensure safety.

Do not perform wiring while power is being supplied. Wiring while the power is being supplied may result in electric shock.

Keep the electrical load below the rated value.

Be sure to evaluate the Switch under actual working conditions after installation.

Do not touch the charged Switch terminals while the Switch has carry current, otherwise an electric shock may be received.

If the Switch has a ground terminal, be sure to connect the ground terminal to a ground wire.

The durability of the Switch greatly varies with switching conditions. Before using the Switch, be sure to test the Switch under actual conditions. Make sure that the number of switching operations is within the permissible range.
If a deteriorated Switch is used continuously, insulation failures, contact welding, contact failures, Switch damage, or Switch burnout may result.

Maintain an appropriate insulation distance between wires connected to the Switch.

Some types of load have a great difference between normal current and inrush current. Make sure that the inrush current is within the permissible value. The greater the inrush current in the closed circuit is, the greater the contact abrasion or shift will be. Consequently, contact welding, contact separation failures, or insulation failures may result. Furthermore, the Switch may become broken or damaged.


The user must not attempt to repair or maintain the Switch and must contact the machine manufacturer for any repairs or maintenance.

Do not attempt to disassemble or modify the Switch. Doing so may cause the Switch to malfunction.

Do not drop the Switch. Doing so may result in the Switch not performing to its full capability.


Pay the utmost attention so that each terminal is wired correctly. If the terminal is wired incorrectly, the Switch will not function.
Furthermore, not only will the Switch have a negative influence on the external circuit, the Switch itself may become damaged or burnt.


Do not modify the Actuator, otherwise the operating characteristics and performance of the Actuator will change.

Do not enlarge the mounting holes of the Switch or modify the Switch, otherwise insulation failures, housing damage, or human accidents may result.

Do not apply oil, grease, or other lubricants to the moving parts of the Actuator, otherwise the Actuator may not operate correctly. Furthermore, ingress of oil, grease, or other lubricants inside the Switch may reduce sliding characteristic or cause failures in the Switch.

Mount the Switch and secure it with the specified screws tightened to the specified torque along with flat and spring washers.

Be sure to wire the Switch so that the conduit opening is free of metal powder or any other impurities.

If glue or bonding agent is applied, make sure that it does not adhere to the movable parts or enter the Switch, otherwise the Switch may not work correctly or cause contact failure. Some types of glue or bonding agent may generate a gas that may have a negative influence on the Switch. Pay the utmost attention when selecting the glue or locking agent.

Some models allow changes in the head direction. When changing the head of such a model, make sure that the head is free of any foreign substance. Tighten each screw of the head to the rated torque.

Be sure to take measures so that no foreign material, oil, or water will enter the Switch through the conduit opening. Be sure to attach a connector suitable for the cable thickness and tighten the connector securely to the rated torque.

Do not impose shock or vibration on the Actuator while it is fully pressed. Otherwise, the Actuator will partially abrade and an actuation failure may result.