Grounding - Omron NA5-15W101S-V1 User Manual

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Grounding

Grounding has the following two purposes.
• Protective Grounding
Protective grounding is done to ensure safety. It is intended to prevent electrical shock by holding the
electrical potential at the grounding potential that is generated by factors such as leakage, induction,
or failure.
• Functional Grounding
Functional grounding is done to protect device and system functions, including prevention of noise
from external sources, or prevention of noise from devices or equipment that could have harmful
effects on other devices or equipment.
The functional ground must in some cases be determined by experimentation. It is important to suffi-
ciently check the particular circumstances before grounding.
Grounding Methods and Precautions
 Wiring the Ground
The NA unit has a protective ground terminal (
1. Protective Ground
For safety, be sure to use a ground of 100 Ω or less for the protective ground of the NA unit. For
the grounding wiring, refer to 3. Grounding Wiring on page 3-20.
• Applicable Wire
Conductor cross-section
• Screw Tightening Torque
1.0 to 1.2 N·m
NA-series Programmable Terminal Hardware(-V1) User's Manual (V125)
2
2.00 mm min.
24VDC 24VDC
SD SD SD
+ -
3 Installation and Wiring
) and a functional ground terminal (
Protective ground terminal
3
).
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