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 precautions given in this manual are concerned with this product only. For the safety precautions of
the programmable controller system, refer to the user's manual for the CPU module used.
In this manual, the safety precautions are classified into two levels: "
CAUTION".
WARNING
!
CAUTION
!
Under some circumstances, failure to observe the precautions given under "
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]

Do not write data into the "System area" of the buffer memory of intelligent function modules.
Also, do not use any "Use prohibited" signals as an output signal to an intelligent function
module from the programmable controller CPU.
Writing data into the "System area" or outputting a signal for "Use prohibited" may cause a
programmable controller system malfunction.
 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 100mm(3.9inch) or more from each other.
Not doing so could result in noise that may cause malfunction.
 At power-on, a voltage may be applied or a current may flow between output terminals for a
moment. In such case, wait until the analog output becomes stable to start controlling the
external device.
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 SAFETY PRECAUTIONS 
(Read these precautions before using this product.)
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.
WARNING
!
!
CAUTION
WARNING " and "
!
CAUTION" may lead to
!
!
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