Emerson Rosemount 3144P Quick Start Manual page 9

April 2015
Load limitations
The power required across the transmitter power terminals is 12 to 42.4 Vdc (the
power terminals are rated to 42.4 Vdc). To prevent the possibility of damaging
the transmitter, do not allow terminal voltage to drop below 12.0 Vdc when
changing the configuration parameters.
1. Without transient protection (optional).
Ground the transmitter
Ungrounded thermocouple, mV, and RTD/ohm Inputs
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 (the most common).
Option 1 (recommended for ungrounded transmitter housing)
1. Connect signal wiring shield to the sensor wiring shield.
2. Ensure the two shields are tied together and electrically isolated from the
transmitter housing.
3. Ground shield at the power supply end only.
Ensure that the sensor shield is electrically isolated from the surrounding

grounded fixtures.
A
C
A. Remote Sensor Housing
B. Transmitter
Maximum Load = 40.8 X (Supply Voltage - 12.0)
4–20 mA dc
1240
1100
1000
750
500
250
0
10 18.1
12.0 Min
Supply Voltage (Vdc)
B
D
C. Sensor
D. Shield Ground Points
HART and Analog
Operating Range
Analog Only
Operating Range
30 42.4
D
Quick Start Guide
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