Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 5

[WIRING PRECAUTIONS]
CAUTION
● Perform class D grounding (grounding resistance: 100Ω or less) to the grounding terminal on the CPU
module with a wire 2 mm2 or thicker. Do not use common grounding with heavy electrical systems
(refer to the User's Manual (Hardware) of the CPU module used).
● Connect the power supply to the dedicated terminals specified in the User's Manual (Hardware) of the
CPU module to be used. If an AC power supply is connected to a DC input/output terminal or DC
power supply terminal, the PLC will burn out.
● Do not wire vacant terminals externally. Doing so may damage the product.
● Install module so that excessive force will not be applied to terminal blocks, power connectors or I/O
connectors. Failure to do so may result in wire damage/breakage or PLC failure.
● Make sure to observe the following precautions in order to prevent any damage to the machinery or
accidents due to malfunction of the PLC caused by abnormal data written to the PLC due to the
effects of noise:
- Do not bundle the power line and input/output cables together with or lay them close to the main
circuit, high-voltage line, load line or power line. As a guideline, lay the power line, control line and
communication cables at least 100 mm away from the main circuit, high-voltage line, load line or
power line.
[STARTUP AND MAINTENANCE PRECAUTIONS]
WARNING
● Do not touch any terminal while the PLC's power is on. Doing so may cause electric shock or
malfunctions.
● Before cleaning or retightening terminals, cut off all phases of the power supply externally. Failure to
do so in the power ON status may cause electric shock.
● Before modifying the program in operation, forcing output, running or stopping the PLC, read through
this manual carefully, and ensure complete safety. An operation error may damage the machinery or
cause accidents.
[STARTUP AND MAINTENANCE PRECAUTIONS]
CAUTION
● Do not disassemble or modify the PLC. Doing so may cause fire, equipment failures, or malfunctions.
For repair, contact your local Mitsubishi Electric representative.
● Turn off the power to the PLC before connecting or disconnecting any extension cable. Failure to do
so may cause equipment failures or malfunctions.
● Turn off the power to the PLC before attaching or detaching the following devices. Failure to do so
may cause equipment failures or malfunctions.
- Peripheral devices, expansion board and expansion adapter
- Extension modules, bus conversion module and connector conversion module
- Battery
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