Chapter5 Procedures And Settings Before Operation; Handling Precautions - Mitsubishi MELSEC-Q Series User Manual

5
PROCEDURES AND SETTINGS BEFORE
OPERATION
CHAPTER5
This chapter describes the operating procedures before operation, part names, and setting
and wiring method of the QD72P3C3.
5.1

Handling Precautions

This section describes precautions on handling the QD72P3C3.
Be sure to shut off all phases of the external power supply used by the system before cleaning or
retightening module fixing screw.
Failure to do so may cause an electric shock.
Use the programmable controller in the environment conditions given in the general specifications of
the User's Manual for the CPU module.
Failure to do so may cause an electric shock, fire, malfunction, or damage to or deterioration of the
product.
Do not directly touch any conductive part or electronic part of the module.
Doing so may cause a malfunction or failure of the module.
Be careful to prevent foreign matter such as dust or wire chips from entering the module.
Failure to do so may cause a fire, failure or malfunction.
Do not disassemble or remodel each of the modules.
Doing so may cause failure, malfunctions, personal injuries and/or a fire.
Be sure to shut off all phases of the external power supply used by the system before mounting or
removing the module.
Not doing so may result in a failure or malfunction of the module.
While pressing the installation lever located at the bottom of the module, fully insert the module fixing
projection into the fixing hole in the base unit and press the module using the hole as a fulcrum.
Incorrect module mounting may cause a malfunction, failure, or drop of the module.
In an environment of frequent vibrations, secure the module with screws.
The screws must be tightened within the specified torque range.
If the screw is too loose, it may cause a drop, short circuit, or malfunction.
Excessive tightening may damage the screw and/or the module, resulting in a drop, short circuit or
malfunction.
PROCEDURES AND SETTINGS BEFORE
OPERATION
DANGER
CAUTION
5.1 Handling Precautions
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