Connect Wiring And Power Up - Emerson Rosemount 2120 Reference Manual

Electrical installation
March 2022
4.2.6 Grounding
Make sure grounding is done according to national and local electrical codes. Failure to do
so may impair the protection provided by the equipment.
Signal cable shield grounding
Make sure the instrument cable shield is:
• Trimmed close and insulated from touching the housing.
• Continuously connected throughout the segment.
• Connected to a good earth ground at the power supply end.
Figure 4-7: Signal Cable Shield Grounding at Power Supply End
A. Trim shield and insulate
B. Minimize distance
C. Trim shield
D. Connect shield back to the power supply ground
Grounding the housing
The most effective grounding method for the metal housing is a direct connection to
earth ground with minimal impedance. Housings with NPT conduit entries do not have an
earth ground point and must use the fork earth.
Figure 4-8: Ground Screws
A. External ground screw
4.3

Connect wiring and power up

Procedure
1.
48
B
B
D
C C
A
Verify the power supply is disconnected.
A
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