Mitsubishi FX3U Series User Manual

FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
156
9 Preparation for Wiring and Power Supply Wiring Procedures
9.4 Grounding
9.4 Grounding
Ground the PLC as stated below.
• Perform class D grounding. (Grounding resistance: 100Ω or less)
• Ground the PLC independently if possible.
If it cannot be grounded independently, ground it jointly as shown below.
Extension devices of PLC (except expansion board and special communication/high-speed input/output
adapter)
• Use ground wires thicker than AWG14 (2 mm
2
).
• Position the grounding point as close to the PLC as possible to decrease the length of the ground wire.
PLC
Another
equipment
PLC
Another
equipment
PLC
Another
equipment
Shared grounding
Good condition
Common grounding
Not allowed
Independent grounding
Best condition
Expansion
board
Input/output
extension unit
Main unit
Special
adapter
Special
extension
Another
equipment
PLC
Independent grounding
Class D grounding
(grounding resistance : 100
Ω or less)

Mitsubishi FX3U Series Specifications

General

Brand	Mitsubishi
Model	FX3U Series
Category	Controller
Language	English