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General Precautions

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

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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

DC_3-Wire_NPN_Output_Sensors_diagram1

(2)DC 2-Wire Sensors

DC_2_Wire_Sensors_diagram1

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

DC_3-Wire_NPN_Output_Sensors_diagrams2

(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.

DC_2_Wire_Sensors_diagrams2

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

DC_3_Wire_NPN_Output_Sensors_diagrams3

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.

DC_2_Wire_Sensors_diagram3

(2)AC 2-Wire Sensors

AC-2_Wire_Sensors_diagrams

Operating Environment

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