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Transmitter housing
The most effective grounding method is direct connection to earth ground with minimal
impedance. There are two grounding screw connections provided (see
Figure 4-1: Ground Screws
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A. Internal ground screw
B. External ground screw
Cable shield grounding
Make sure the instrument cable shield is:
•
Trimmed close and insulated from touching the transmitter housing.
•
Continuously connected throughout the segment.
•
Connected to a good earth ground at the power supply end.
Figure 4-2: Cable Shield
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A. Insulate shield and drain wire
B. Minimize distance
C. Trim shield and insulate exposed drain wire
D. Connect drain wire to the power supply ground
Note
Do not ground the shield and its drain wire at the transmitter. If the cable shield touches
the transmitter housing, it can create ground loops and interfere with communications.
Reference Manual
Electrical installation
00809-0100-4408
February 2020
Rosemount 5408 and 5408:SIS Level Transmitters
75
Summary of Contents for Rosemount 5408
Page 4: ...4 ...
Page 8: ...Contents Reference Manual February 2020 00809 0100 4408 viii Reference Manual ...
Page 10: ...Introduction Reference Manual February 2020 00809 0100 4408 10 Reference Manual ...
Page 20: ...Transmitter overview Reference Manual February 2020 00809 0100 4408 20 Reference Manual ...
Page 72: ...Mechanical installation Reference Manual February 2020 00809 0100 4408 72 Reference Manual ...
Page 100: ...Operation Reference Manual February 2020 00809 0100 4408 100 Reference Manual ...
Page 240: ...Product certifications Reference Manual February 2020 00809 0100 4408 240 Reference Manual ...
Page 242: ...Product certifications Reference Manual February 2020 00809 0100 4408 242 Reference Manual ...
Page 244: ...Product certifications Reference Manual February 2020 00809 0100 4408 244 Reference Manual ...
Page 246: ...Product certifications Reference Manual February 2020 00809 0100 4408 246 Reference Manual ...
Page 248: ...Product certifications Reference Manual February 2020 00809 0100 4408 248 Reference Manual ...