Mitsubishi Q00JCPU User Manual page 6

[Installation Precautions]
Use the PLC in an environment that meets the general specifications contained in QCPU User's
Manual (Hardware Design, Maintenance and Inspection).
Using this PLC in an environment outside the range of the general specifications could result in
electric shock, fire, erroneous operation, and damage to or deterioration of the product.
While pressing the installation lever located at the bottom of module, insert the module fixing tab into
the fixing hole in the base unit until it stops. Then, securely mount the module with the fixing hole as
a supporting point.
Incorrect loading of the module can cause a malfunction, failure or drop.
When using the PLC in the environment of much vibration, tighten the module with a screw.
Tighten the screw in the specified torque range.
Undertightening can cause a drop, short circuit or malfunction.
Overtightening can cause a drop, short circuit or malfunction due to damage to the screw or module.
When installing extension cables, be sure that the base unit and the extension module connectors
are installed correctly.
After installation, check them for looseness.
Poor connections could cause an input or output failure.
Securely load the memory card into the memory card loading connector.
After installation, check for lifting.
Poor connections could cause an operation fault.
Completely turn off the externally supplied power used in the system before mounting or removing
the module. Not doing so could result in damage to the product.Note that the module can be
changed online (while power is on) in the system that uses the CPU module compatible with online
module change or on the MELSECNET/H remote I/O station.
Note that there are restrictions on the modules that can be changed online(while power is on), and
each module has its predetermined changing procedure.
For details, refer to QCPU User's Manual (Hardware Design, Maintenance and Inspection) and the
online module change section in the manual of the module compatible with online module change.
Do not directly touch the module's conductive parts or electronic components.
Touching the conductive parts could cause an operation failure or give damage to the module.
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CAUTION