Emerson Rosemount 3051P Reference Manual page 56

Electrical installation
April 2020
4.6.1 Conduit installation
CAUTION
If all connections are not sealed, excess moisture accumulation can damage the
transmitter.
Make sure to mount the transmitter with the electrical housing positioned downward
for drainage.
To avoid moisture accumulation in the housing, install wiring with a drip loop, and
ensure the bottom of the drip loop is mounted lower than the conduit connections of
the transmitter housing.
Figure 4-4: Recommended Conduit Installation Diagrams
A. Possible conduit line positions
B. Sealing compound
4.6.2 Power supply
4–20 mA HART
Transmitter operates on 10.5–42.4 Vdc at the terminal of the transmitter. The dc power
supply should provide power with less than two percent ripple. A minimum of 16.6 V is
required for loops with a 250 Ω resistance.
Note
A minimum loop resistance of 250 Ω is required to communicate with a Field
Communicator. If a single power supply is used to power more than one transmitter, the
power supply used, and circuitry common to the transmitters, should not have more that
20 Ω of impedance at 1200 Hz.
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Reference Manual
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