Omron CJ Series Operation Manual page 112

4 Installation and Wiring
Unit Handling Precautions
• Always turn OFF the power supply to the Controller before you mount or dismount a Unit or connect
or disconnect cables.
• To prevent noise from affecting the system, place all wires connected to the Unit ports in ducts, and
use separate ducts from those used for high-voltage and high-power lines.
• If the Unit was shipped from the factory with the dust protection sheet on top of the Unit, be sure to
remove that sheet before you turn ON the power supply to the Controller. The sheet prevents heat
dissipation and could cause malfunctions.
• If you do not use a communications port, always leave the port's dust cover attached.
4-4
Remove the sheet
after completing wiring.
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)