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Application Precautions 5

!Caution Install the EtherNet/IP Slave Units securely using M5 screws and tighten them

to a torque of 1.47 to 1.96 N·m. Do not over tighten the screws. Doing so may

damage them.

!Caution Do not use the EtherNet/IP Slave Units where they would be continually sub-

jected to water or water spray.

!Caution Take appropriate measures to ensure that the specified power with the rated

voltage is supplied in places where the power supply is unstable, or imple-

ment safety measures using a voltage monitor.

!Caution Tighten the screws on the switch cover to a torque of 0.4 to 0.5 N·m. The

specified degree of protection may not be achieved if the screws are loose.

!Caution When attaching the switch cover, wipe it clean of dust, dirt, contamination,

water, and other matter before attaching it. The specified degree of protection

may not be achieved if the cover is not clean.

!Caution Use the specified connectors and cables for wiring.

!Caution Do not bend the cable past its natural bending radius and do not pull on the

cable with excessive force.

!Caution Use the specified DC power supply.

!Caution Do not exceed the specified communications distance or the specified num-

ber of nodes.

!Caution Do not use organic solvents to clean the EtherNet/IP Slave Units. They may

dissolve or discolor the surface.

5 Application Precautions

Observe the following precautions when using the EtherNet/IP Slave Units.

• Do not attempt to disassemble, repair, or modify the EtherNet/IP Slave

Units.

• Do not drop any Unit or subject any Unit to excessive shock or vibration.

Otherwise, Unit failure or malfunction may occur.

• Tighten connector screws securely.

• Separate the communications cables from the power lines or high-voltage

lines.

• Check wiring and switch settings completely before turning ON the power

supply.

• Make sure that the power supply voltage, terminal polarity, communica-

tions paths, power supply wiring, and I/O voltages are within specifica-

tions. Mistakes in any of these can cause EtherNet/IP Slave Unit failure.

• Turn OFF the power supply to the PLC and all slaves and turn OFF all

communications power supplies before connecting or disconnecting com-

munications cables.

Omron ERT1 Series User Manual

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