Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 4

[Design Precautions]
• Do not install the control lines or communication cables together with the main circuit lines or
power cables.
Keep a distance of 100mm or more between them.
Failure to do so may result in malfunction due to noise.
[Installation Precautions]
• Use the programmable controller in the operating an environment that meets the general
specifications given 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
module, fully insert the module fixing projection(s) into the hole(s) in the base unit 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 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.
• 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 of the module.
Doing so can cause malfunction or failure of the module.
A - 2
CAUTION
!
CAUTION
!
A - 2