Mitsubishi MELSEC Q Series User Manual page 6

[STARTING AND MAINTENANCE PRECAUTIONS]
 Do not disassemble or modify the modules.
Doing so could cause failure, malfunction injury or fire.
 Be sure to shut off all phases of the external power supply used by the system before mounting
or removing the module.
Not doing so may cause failure or malfunction of the module.
In the system where a CPU module supporting the online module change is used and on the
MELSECNET/H remote I/O stations, modules can be replaced online (during energizing).
However, there are some restrictions on replaceable modules and the replacement procedures
are predetermined for each module.
For details, refer to the chapter of the online module change in this manual.
 Do not install/remove the module to/from the base unit, or the terminal block to/from the module
more than 50 times after the first use of the product. (IEC 61131-2 compliant)
Failure to do so may cause malfunction.

Always make sure to touch the grounded metal to discharge the electricity charged in the body,
etc., before touching the module.
Failure to do so may cause a failure or malfunctions of the module.
[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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