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5
Application Precautions
xiii
•
Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.
•
The PC will turn OFF all outputs when its self-diagnosis function detects any
error or when a severe failure alarm (FALS) instruction is executed. As a coun-
termeasure for such errors, external safety measures must be provided to en-
sure safety in the system.
•
The PC outputs may remain ON or OFF due to deposition or burning of the
output relays or destruction of the output transistors. As a countermeasure for
such problems, external safety measures must be provided to ensure safety in
the system.
4
Operating Environment Precautions
Caution
Do not operate the control system in the following locations:
•
Locations subject to direct sunlight.
•
Locations subject to temperatures or humidity outside the range specified in
the specifications.
•
Locations subject to condensation as the result of severe changes in tempera-
ture.
•
Locations subject to corrosive or flammable gases.
•
Locations subject to dust (especially iron dust) or salts.
•
Locations subject to exposure to water, oil, or chemicals.
•
Locations subject to shock or vibration.
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 Wired Remote I/O System can have a large
effect on the longevity and reliability of the system. Improper operating environ-
ments can lead to malfunction, failure, and other unforeseeable problems with
the System. Be sure that the operating environment is within the specified condi-
tions at installation and remains within the specified conditions during the life of
the System.
5
Application Precautions
Observe the following precautions when using the Wired Remote I/O System.
WARNING
Always heed these precautions. Failure to abide by the following precautions
could lead to serious or possibly fatal injury.
•
Always ground the system to 100
Ω
or less when installing the Units. Not con-
necting to a ground of 100
Ω
or less may result in electric shock.
•
Always turn OFF the power supply to the PC before attempting any of the fol-
lowing. Not turning OFF the power supply may result in malfunction or electric
shock.
•
Mounting or dismounting I/O Units, CPU Units, Memory Units, or any other
Units.
