Omron Sysmac CP1H, Operation Manual

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xxvii
Application Precautions 5
!Caution
Take appropriate and sufficient countermeasures when installing systems in
the following locations:
• Locations subject to static electricity or other forms of noise.
• Locations subject to strong electromagnetic fields.
• Locations subject to possible exposure to radioactivity.
• Locations close to power supplies.
!Caution
The operating environment of the PLC System can have a large effect on the
longevity and reliability of the system. Improper operating environments can
lead to malfunction, failure, and other unforeseeable problems with the PLC
System. Make sure that the operating environment is within the specified con-
ditions at installation and remains within the specified conditions during the
life of the system.
5 Application Precautions
Observe the following precautions when using the PLC System.
!WARNING
Always heed these precautions. Failure to abide by the following precautions
could lead to serious or possibly fatal injury.
• Always connect to 100
Ω
or less when installing the Units. Not connecting
to a ground of 100
Ω
or less may result in electric shock.
• Always turn OFF the power supply to the PLC before attempting any of
the following. Not turning OFF the power supply may result in malfunction
or electric shock.
• Mounting or dismounting Expansion Units or any other Units
• Connecting or removing the Memory Cassette or Option Board
• Setting DIP switches or rotary switches
• Connecting or wiring the cables
• Connecting or disconnecting the connectors
!Caution
Failure to abide by the following precautions could lead to faulty operation of
the PLC or the system, or could damage the PLC or PLC Units. Always heed
these precautions.
• When unpacking the Unit, check carefully for any external scratches or
other damages. Also, shake the Unit gently and check for any abnormal
sound.
• Install external breakers and take other safety measures against short-cir-
cuiting in external wiring. Insufficient safety measures against short-cir-
cuiting may result in burning.
• Mount the Unit only after checking the connectors and terminal blocks
completely.
• Be sure that all the terminal screws and cable connector screws are tight-
ened to the torque specified in the relevant manuals. Incorrect tightening
torque may result in malfunction.
• Wire all connections correctly according to instructions in this manual.
• Keep the wire cuttings out of the Unit when wiring.