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● Use the programmable controller in an environment that meets the general specifications in the QCPU
User's Manual (Hardware Design, Maintenance and Inspection).
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 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.
● 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 an SD memory card, fully insert it into the SD memory card slot.
Check that it is inserted completely.
Poor contact may cause malfunction.
● When using an extended SRAM cassette, fully insert it into the cassette connector on the CPU module.
Close the cassette cover to keep the extended SRAM cassette 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.
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 sections in the QCPU User's Manual (Hardware Design, Maintenance and
Inspection) and in the manual for the corresponding module.
● Do not directly touch any conductive part or electronic component of the module, memory card, SD memory
card or extended SRAM cassette. Doing so can cause malfunction or failure.
● When using a motion CPU module and a motion module, make sure that proper modules are combined
before turning on power. If improper modules are used, they may be damaged. For details, refer to the
Motion CPU Module User's Manual.
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Installation Precautions
CAUTION
3
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