Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 6

[Setup and Maintenance Precautions]
• Before performing online operations (especially, program modification, forced output, and
operation status change) for the running CPU module in other station from GX Developer via
MELSECNET/H, read relevant manuals carefully and ensure the safety.
• Do not disassemble or modify the module. Doing so may cause failure, malfunction, injury, or a
fire.
• Use any radio communication device such as a cellular phone or a PHS (Personal Handy-phone
System) more than 25cm (9.85 inches) away in all directions from the programmable controller.
Failure to do so may cause malfunction.
• Shut off the external power supply for the system in all phases before mounting or removing the
module. Failure to do so may cause the module to fail or malfunction.
• Do not touch any terminals while power is on. Doing so will cause electric shock.
• Shut external power supply for the system before cleaning the module or retightening the
terminal screws or module fixing screws.
Failure to do so may cause the module to fail or malfunction.
Undertightening can cause drop of the screw, short circuit or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or
malfunction.
• After the firs use of the product, do not mount/remove the module to/from the base unit more
than 50 times (IEC 61131-2 compliant) respectively.
Exceeding the limit of 50 times may cause malfunction.
• Before handling the module, touch a grounded metal object to discharge the static electricity
from the human body.
Failure to do so may cause the module to fail or malfunction.
[Disposal Precautions]
• When disposing of this product, treat it as industrial waste.
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CAUTION
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CAUTION
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