Mitsubishi Electric MELSEC iQ-R Series Safety Manual page 7

[Wiring Precautions]
CAUTION
● Do not install the control lines or communication cables together with the main circuit lines or power
cables. Failure to do so may result in malfunction due to noise.
● When an overcurrent caused by a failure of an external device or a module flows for a long time, it
may cause smoke and fire. To prevent this, configure an external safety circuit, such as a fuse.
● Programmable controllers must be installed in control panels. Connect the main power supply to the
power supply module in the control panel through a relay terminal block. Wiring and replacement of a
power supply module must be performed by qualified maintenance personnel with knowledge of
protection against electric shock. For wiring, refer to the MELSEC iQ-R Module Configuration Manual.
● For Ethernet cables to be used in the system, select the ones that meet the specifications in the
MELSEC iQ-R Ethernet/CC-Link IE User's Manual (Startup). If not, normal data transmission is not
guaranteed.
[Startup and Maintenance Precautions]
WARNING
● Do not touch any terminal while power is on. Doing so may lead to the electric shock.
● Correctly connect the battery connector. Do not charge, disassemble, heat, short-circuit, solder, or
throw the battery into the fire. Also, do not expose it to liquid or strong shock. Doing so will cause the
battery to produce heat, explode, ignite, or leak, resulting in injury and fire.
● Shut off the external power supply (all phases) used in the system before cleaning the module or
retightening the terminal block mounting screws, terminal screws, or module fixing screws. Failure to
do so may result in electric shock. Tighten the terminal block screws or connector screws within the
specified torque range. If the terminal block mounting screw or terminal screw is too loose, it may
cause a short circuit, fire, or malfunctions. If too tight, it may damage the screw and/or the module,
resulting in a drop of the screw or module, a short circuit or malfunctions. If the module fixing screw is
too loose, it may cause a drop of the screw or module. Overtightening the screw may cause a drop
due to the damage of the screw or module.
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