Grounding The Transmitter - Emerson Rosemount 702 Reference Manual

Reference Manual
00809-0200-4702, Rev DA
7.5

Grounding the transmitter

The Rosemount 702 Transmitter operates with the housing grounded or floating. Floating systems,
however, can cause extra noise that may affect many types of readout devices. If the signal appears noisy
or erratic, grounding at a single point may solve the problem. Grounding of the electronics enclosure
should be done in accordance with local and national installation codes. Grounding is accomplished
through the process connection using the internal or external case grounding terminal.
Determining grounding requirements
Each process installation has different grounding requirements. Use the options recommended by the
facility for the specific switch type, or begin with Option 1, which is the most common.
Option 1
1. Connect switch wiring shield to the grounded transmitter housing.
2. Ensure that the transmitter housing is electrically isolated from the switch wiring.
Option 2
1. Ground switch wiring shield at the switch.
2. Ensure that the switch wiring and shield are electronically isolated from the transmitter housing.
Note
Always use facility recommended wiring practices.
Mounting, Wiring Switches, and Output Circuits: Models 702DX32 and 702DX42
A
A
B
Mounting, Wiring Switches, and Output Circuits:
B
C
C
Models 702DX32 and 702DX42
July 2017
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