Safety Precautions - Mitsubishi Electric MELSEC Q Series User Manual

Before using the product, please read this manual, the relevant manuals introduced in this manual,
standard programmable controller manuals, and the safety standards carefully and pay full attention to
safety to handle the product correctly.
In this manual, the safety instructions are ranked as "DANGER" and "CAUTION".
DANGER
CAUTION
Note that the CAUTION level may lead to a serious consequence according to the circumstances.
Always follow the instructions of both levels because they are important to personal safety.
Please save this manual to make it accessible when required and always forward it to the end user.
[Design Precautions]
A safety relay module turns OFF all outputs by safety input or a failure of external power supply.
Create an external circuit to securely stop the power of hazard by turning OFF the outputs.
Incorrect configuration may result in an accident.
When overcurrent due to such as load short-circuit or load current exceeding the rating flows for a
long time, it may cause smoke or fire. To prevent this, create external safety circuit such as a fuse.
Create short-circuit current protection for a safety relay and a protection circuit such as a fuse and
breaker, outside a safety relay module.
To inhibit a restart without manual operation after safety function of the safety relay module was
performed and outputs were turned OFF, create reset start-up circuit using such as a reset switch
outside the safety relay module.

SAFETY PRECAUTIONS

(Always read these instructions before using this equipment.)
Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
resulting in medium or slight personal injury or physical damage.
DANGER
A
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