Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 7

[WIRING PRECAUTIONS]
CAUTION
● Perform class D grounding (grounding resistance: 100 or less) of the grounding terminal on the CPU
module and extension modules with a wire 2  or thicker. Do not use common grounding with heavy
electrical systems (refer to the User's Manual (Hardware) of the CPU module used).
● Individually ground the FG terminal of the programmable controller with a ground resistance of 100
or less. Failure to do so may result in electric shock or malfunction.
● Install module so that excessive force will not be applied to terminal blocks, or communication cables.
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 control line and communication 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.
- Ground the shield of the shielded wire or shielded cable at one point on the PLC. However, do not
use common grounding with heavy electrical systems.
● For Ethernet cables to be used in the system, select the ones that meet the specifications described in
Page 46 Wiring Products. If not, normal data transmission is not guaranteed.
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