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SAFETY PRECAUTIONS
(Read these precautions before using this product.)
Before using this product, please read this manual and the relevant manuals carefully and pay full attention
to safety to handle the product correctly.
In this manual, the safety precautions are classified into two levels: " WARNING" and " CAUTION".
Under some circumstances, failure to observe the precautions given under " CAUTION" may lead to
serious consequences.
Observe the precautions of both levels because they are important for personal and system safety.
Make sure that the end users read this manual and then keep the manual in a safe place for future
reference.
[Design Precautions]
WARNING
When a safety programmable controller detects an error in an external power supply or a failure in
programmable controller, it turns off all the outputs.
Create an external circuit to securely stop the power of hazard by turning off the outputs. Incorrect
configuration may result in an accident.
Create short current protection for a safety relay, and a protection circuit such as a fuse, and
breaker, outside a safety programmable controller.
When data/program change, or status control is performed from a personal computer to a running
safety programmable controller, create an interlock circuit outside the sequence program and safety
programmable controller to ensure that the whole system always operates safely.
For the operations to a safety programmable controller, pay full attention to safety by reading the
relevant manuals carefully, and establishing the operating procedure.
Furthermore, for the online operations performed from a personal computer to a safety CPU module,
the corrective actions against a communication error due to a cable connection fault, etc. should be
predetermined as a system.
WARNING
CAUTION
Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
resulting in minor or moderate injury or property damage.