Emerson Rosemount 848T, Reference Manual, Page: 20 / 136

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Reference Manual
00809-0100-4697, Rev GA
Section 2: Installation
November 2014
Installation
Shielded wire
Each process installation has different requirements for grounding. Use the grounding options
recommended by the facility for the specific sensor type or begin with grounding option 1
(most common).
Ungrounded thermocouple, mV, and RTD/ohm inputs
Option 1:
1. Connect signal wiring shield to the sensor wiring shield(s).
2. Ensure shields are tied together and electrically isolated from transmitter enclosure.
3. Only ground shield at the power supply end.
4. Ensure sensor shield(s) is electrically isolated from the surrounding grounded fixtures.
A. Sensor wires
B. 848T
C. Power supply
D. Shield ground point
Option 2:
1. Connect sensor wiring shield(s) to the transmitter enclosure (only if enclosure is
grounded).
2. Ensure sensor shield(s) is electrically isolated from surrounding fixtures that may be
grounded.
3. Ground signal wiring shield at the power supply end.
A. Sensor wires
B. 848T
C. Power supply
D. Shield ground points
A
B
C
D
A
B
C
D