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2 Wiring and Connection
MITSUBISHI CNC
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2-6-2 Connection of the grounding cable
(1) Connection of the protective grounding (PE) and frame ground (FG)
Each unit has a terminal or mounting hole to connect PE ( ) or FG.
Please connect an earth wire to the main ground of a cabinet or a machine frame at one point.
Ground each device according to the grounding conditions set forth by each country. (Typically, a Y-
connection neutral point ground is used in Europe.)
PE: Grounding to provide protection from electric shock, etc.
FG: Grounding to stabilize the operation of the devices, etc. (Suppress noise)
(2) Grounding cable size
Earth wire size should follow the following table.
Do not connect the grounding cable from each unit
directly to the grounding plate. Noise from other units
could result in malfunctions.
Subject Grounding cable Grounding cable size (Required grounding)
Power supply grounding cable Larger than thickness of wire connected to L1/L2/L3. (PE)
Motor grounding cable Larger than thickness of wire connected to U/V/W. (PE)
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POINT
Grounding
plate
Unit