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[Installation Precautions]
CAUTION
● 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 mounting 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/removing a
module or connecting/disconnecting a connector. Failure to do so may result in damage to the
product.
For the remote I/O stations of function version D or later, online module change can be performed.
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 online module change in the Q Corresponding MELSECNET/H Network
System Reference Manual (Remote I/O network).
● Do not directly touch any conductive parts and electronic components of the module.
Doing so can cause malfunction or failure of the module.