Safety Precautions - Mitsubishi Electric MELSEC Q Series User Manual

Before using this product, please read this manual and the relevant manuals carefully and pay full
attention to safety to handle the product correctly.
The instructions given in this manual are concerned with this product. For the safety instructions of the
programmable controller system, please read the CPU module User's Manual.
In this manual, the safety precautions are classified into two levels: "
!
!
Under some circumstances, failure to observe the precautions given under "
serious consequences.
Make sure that the end users read this manual and then keep the manual in a safe place for future
reference.
[Design Precautions]
 Do not write data into the "read-only area" in the buffer memory of the intelligent function
module. In addition, do not turn on/off the "reserved" signals among the I/O signals transferred
to/from the programmable controller CPU.
Doing so can malfunction the programmable controller system.
 Depending on the malfunction of the external output transistor, there may be cases where the
output is on or off status. Install external monitoring circuitry for output signals that may lead to
major accidents.
 Do not bunch the control wires or communication cables with the main circuit or power wires, or
install them close to each other.
They should be installed 100 mm(3.94 inch) or more from each other.
Not doing so could result in noise that may cause malfunction.
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 SAFETY PRECAUTIONS 
(Read these precautions before using this product.)
Indicates that incorrect handling may cause hazardous conditions,
WARNING
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
CAUTION
resulting in minor or moderate injury or property damage.
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WARNING
!
CAUTION
!
WARNING " and " CAUTION".
! !
CAUTION" may lead to
!
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