Mitsubishi Electric MELSEC-Q Series User Manual page 4

[Installation Precautions]
• Use the PLC in an environment that meets the general specifications contained in Basic Model
QCPU (Q Mode) 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.
• Hold down the module loading lever at the module bottom, and securely insert the module fixing
hook into the fixing hole in the base module. 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 more cables, be sure that the base module and the module connectors are
installed correctly.
After installation, check them for looseness.
Poor connections could cause an input or output failure.
• Completely turn off the external power supply before loading or unloading the module.
Not doing so could result in electric shock or damage to the product.
• 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.
[Wiring Precautions]
• Completely turn off the external power supply when installing or placing wiring.
Not completely turning off all power could result in electric shock or damage to the product.
• When turning on the power supply or operating the module after installation or wiring work, be
sure that the module's terminal covers are correctly attached.
Not attaching the terminal cover could result in electric shock.
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CAUTION
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DANGER
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