Mitsubishi Electric MELSEC Q Series User Manual page 5

 Be careful not to let foreign matter such as sawdust or wire chips get inside the module.
They may cause fires, failure or malfunction.

A protective film is attached to the top of the module to prevent foreign matter, such as wire
chips, from entering the module during wiring.
Do not remove the film during wiring.
Remove it for heat dissipation before system operation.
[Starting 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 terminal screws or module mounting 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.
 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 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 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.
A - 3
CAUTION
!
WARNING
!
CAUTION
!
A - 3