Handling Precautions - Mitsubishi Electric MELCEC Q Series User Manual

4. CPU MODULE
4.5

Handling Precautions

The following shows precautions when handling the CPU module from unpacking to
installation.
CAUTION
(1)
(2)
(3)
Use the programmable controller under the environment that meets the general
specifications in this manual.
Failure to do so may result in electric shock, fire, malfunction, or damage to or
deterioration of the product.
To mount the CPU 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 mounting may cause malfunction, failure or a drop of the module.
When using the programmable controller in an environment of frequent vibrations,
fix the module with the screw.
Tighten the screw 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.
Insert securely the module fixing projection at the bottom of the AnS series module
into the fixing hole in the base unit and then tighten the module fixing screw within
the specified torque.
When no screw is tightened, even if the module is installed correctly, it may cause
malfunctions, a failure or a drop of the module.
Tightening the screw excessively may damage the screw and/or the module,
resulting in a drop of the module, a short circuit or malfunctions.
When using an extension cable, connect it to the extension cable connector of the
base unit securely.
Check the connection for looseness.
Poor contact may cause incorrect input or output.
When using a memory card, fully insert it into the memory card slot.
Check that it is inserted completely.
Poor contact may cause malfunction.
Shut off the external power supply for the system in all phases before mounting or
removing the module.
Failure to do so may result in damage to the product.
Do not directly touch any conductive part or electronic components of the
module.Doing so can cause malfunctions or a failure of the module.
Do not drop or allow any impact to the module case, memory card, terminal block
connector, or pin connector.
Do not remove the printed-circuit board from the module case. Doing so may cause
failure.
Use caution to prevent foreign matter, such as wire chips, from entering the module
during wiring.
If any foreign matter has entered the module, remove it.
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