YOKOGAWA N-IO, Руководство по установке

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1. System installation requirements
1-11
TI 30A30A10-01EN
n
Grounding circuit
An enclosure must be grounded according to the grounding network topology of the building or
plant for installation. In order to connect an enclosure with a protective grounding system, the
grounding topology shown in the figures “Grounding connected to single grounding bus inlet” or
“Grounding connected to each grounding bus inlet” can be used. A grounding cable with a cross
section of at least 5.5 mm
2
or more that complies with the standards in each country and region
should be used between each enclosure and grounding bus inlet.
When providing lightning arresters on power and signal lines, those arresters need to be
grounded to the same bus. For details, see Section 1.4, “Noise countermeasures.”
Enclosure Enclosure Enclosure Enclosure
Protective grounding system
Graunding bus inlet
F010304.ai
G: Protective conductor terminal
G G G G
Figure Grounding connected to a single grounding bus inlet
Protective
grounding
system
Protective
grounding
system
Protective
grounding
system
Protective
grounding
system
G: Protective conductor terminal
Graunding bus inlet
F010305.ai
G
Enclosure Enclosure Enclosure Enclosure
G G G
Figure Grounding connected to each grounding bus inlet
Feb. 26, 2018-00