Mitsubishi MELSEC LJ71C24, User Manual

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[Startup/Maintenance Precautions]
!
WARNING
•
Do not touch any terminal while power is on. Doing so will cause electric shock or malfunction.
•
Shut off the external power supply for the system in all phases before cleaning the module or
retightening the terminal block screw. Failure to do so may result in electric shock.
[Startup/Maintenance Precautions]
!
CAUTION
•
Do not disassemble or modify the modules. Doing so may cause failure, malfunction, injury, or a
fire.
•
Shut off the external power supply for the system in all phases before connecting or
disconnecting the module. Failure to do so may cause the module to fail or malfunction.
•
Tighten the terminal block screw within the specified torque range.
Undertightening can cause drop of the component or wire, short circuit, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or
malfunction.
•
After the first use of the module (including a display unit), the number of module
connections/disconnections is limited to 50 times. Exceeding the limit (IEC 61131-2 compliant)
may cause malfunction.
•
Before handling the module, touch a conducting object such as a grounded metal to discharge
the static electricity from the human body.
Failure to do so may cause the module to fail or malfunction.