Proface LT4300M - 5.7 Modular HMI + Control" Manuel d'utilisateur télécharger pdf (Page 41)

LT-4201TM/4301TM Installation Guide

English

Common Grounding

If exclusive grounding is not possible, use a common grounding point. Use grounding

resistance of 10 Ω or less, wire thickness of 2.6 mm or more, or your country’s applicable

standard for the grounding point.

Precautions:

 Do not use common grounding, since it can lead to accidents and machine breakdown.

 If the equipment does not function properly when grounded, disconnect the ground wire

from the FG terminal.

If exclusive grounding is not possible, use a common connection point.

Grounding Procedure

NOTE: FG and SG terminals are internally connected in the LT. When connecting an

external device to the LT using the SG terminal, be sure to check that no short-circuit loop

is created when you setup the system.

Step Action

1 Check that the grounding resistance is less than 100 Ω.

(Grounding resistance of 100 Ω or less, wire thickness of 1.6 mm or more, or your

country’s applicable standard.)

2 Create the connection point as close to the unit as possible, and make the wire as short

as possible. When using a long grounding wire, replace the thin wire with a thicker wire,

and place it in a duct.

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Proface LT4300M - 5.7 Modular HMI + Control" Manuel d'utilisateur Page 41