Mitsubishi Electric MELSEC Q Series User Manual page 6

[Startup and Maintenance Precautions]
● Do not touch any terminal while power is on.
Doing so will cause electric shock or malfunction.
● Shut off the external power supply (all phases) used in the system before cleaning the module or
retightening the module fixing screws.
Failure to do so may result in electric shock or 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.
● Before performing online operations (especially, program modification, forced output, and operation
status change) for the running CPU module from the peripheral connected, read relevant manuals
carefully and ensure the safety.
Improper operations may damage machines or cause accidents.
● Do not disassemble or modify the modules.
Doing so may cause failure, malfunction, injury, or a fire.
● Use any radio communication device such as a cellular phone or 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 (all phases) used in the system before mounting or removing the
module.
Failure to do so may cause the module to fail or malfunction.
● After the first use of the product, do not mount/remove the module to/from the base unit more than
50 times (IEC 61131-2 compliant).
Exceeding the limit of 50 times may cause malfunction.
● Do not drop or apply shock to the battery to be installed in the module.
Doing so may damage the battery, causing the battery fluid to leak inside the battery.
If the battery is dropped or any shock is applied to it, dispose of it without using.
● Before handling the module, touch a conducting object such as a grounded metal to discharge the
static electricity from the human body.
Failure to do so may cause the module to fail or malfunction.
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WARNING
CAUTION