Connect The Wiring And Power Up - Emerson Rosemount 3051 Series Quick Start Manual

August 2023
5

Connect the wiring and power up

Figure 5-1
Rosemount 3051 transmitter and enable communications with a
handheld communicator. Resistance and power requirements vary
based on the interface type used to communicate with the device.
See Table 5-1
Use the following steps to wire the transmitter:
Procedure
1. Remove the housing cover on the field terminals side.
2. Connect the positive lead to the "+" terminal (PWR/COMM) and
the negative lead to the "–" terminal.
3. Ensure full contact with terminal block screw and washer.
When using a direct wiring method, wrap wire clockwise to
ensure it is in place when tightening the terminal block screw.
Note
The use of a pin or a ferrule wire terminal is not recommended
as the connection may be more susceptible to loosening over
time or under vibration.
4. Ensure proper grounding.
Note
It is important that the instrument cable shield:
•
•
•
Do not connect the powered signal wiring to the test
terminals. Power could damage the test diode in the test
connection. Shielded twisted pair cable should be used for
best results. Use 24 AWG or larger wire and do not exceed
5,000 ft (1500 m).
5. Plug and seal unused conduit connections.
6. If applicable, install wiring with a drip loop. Arrange the drip
loop so the bottom is lower than the conduit connections and
the transmitter housing.
7. Replace the housing cover.
Quick Start Guide
shows wiring connections necessary to power a
for specific loop power and resistance needs.
Be trimmed close and insulated from touching the
transmitter housing
Be connected to the next shield if cable is routed through a
junction box
Be connected to a good earth ground at the power supply
end
Quick Start Guide
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