General Precautions

For precautions on individual products, refer to the Safety Precautions in individual product information.

To ensure safety, always observe the following precautions.

Wiring Considerations

Power Supply Voltage

Do not use a voltage that exceeds the operating voltage range. Applying a voltage that is higher than the operating voltage range, or using an AC power supply (100 VAC or higher)for a Sensor that requires a DC power supply may cause explosion or burning.

(1)DC 3-Wire NPN Output Sensors

(2)DC 2-Wire Sensors

Load short-circuiting

・ Do not short-circuit the load. Explosion or burning may result.
・ The load short-circuit protection function operates when the power supply is connected with the correct polarity and the power is within the rated voltage range.

(1)DC 3-Wire NPN Output Sensors

(2)DC 2-Wire Sensors

・ Even with the load short-circuit protection function, protection will not be provided when a load short circuit occurs if the power supply polarity is not correct.

Incorrect Wiring

Be sure that the power supply polarity and other wiring is correct. Incorrect wiring may cause explosion or burning.

DC 3-Wire NPN Output Sensors

Connection without a Load

If the power supply is connected directly without a load, the internal elements may explode or burn. Be sure to insert a load when connecting the power supply.

(1)DC 2-Wire Sensors

・ Even with the load short-circuit protection function, protection will not be provided if both the power supply polarity is incorrect and no load is connected.

(2)AC 2-Wire Sensors

Operating Environment

Do not use the Sensor in an environment where there are explosive or combustible gases.