Mitsubishi Electric MELSEC-Q series User Manual page 4

[Installation Precautions]
● Use the programmable controller in an environment that meets the general specifications in the user's
manual for the CPU module used. Failure to do so may result in electric shock, fire, malfunction, or
damage to or deterioration of the product.
● To mount the module, while pressing the module mounting lever located in the lower part of the
module, fully insert the module fixing projection(s) into the hole(s) in the base unit and press the
module until it snaps into place. Incorrect interconnection may cause malfunction, failure, or drop of
the module. When using the programmable controller in an environment of frequent vibrations, fix the
module with a screw.
● Tighten the screws within the specified torque range. 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.
● Shut off the external power supply (all phases) used in the system before mounting or removing the
module. Failure to do so may result in damage to the product. A module can be replaced online (while
power is on) on any MELSECNET/H remote I/O station or in the system where a CPU module
supporting the online module change function is used. Note that there are restrictions on the modules
that can be replaced online, and each module has its predetermined replacement procedure. For
details, refer to the relevant chapter in this manual.
● Do not directly touch any conductive parts and electronic components of the module. Doing so can
cause malfunction or failure of the module.
[Wiring Precautions]
● After installation and wiring, attach the included terminal cover to the module before turning it on for
operation. Failure to do so may result in electric shock.
● Individually ground the FG terminal of the programmable controller with a ground resistance of 100
or less. Failure to do so may result in electric shock or malfunction.
● Tighten the terminal screws within the specified torque range. Undertightening can cause short circuit,
fire, or malfunction. Overtightening can damage the screw and/or module, resulting in drop, short
circuit, or malfunction.
● Prevent foreign matter such as dust or wire chips from entering the module. Such foreign matter can
cause a fire, 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.
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CAUTION
WARNING
CAUTION