Emerson Rosemount 3051S Series - Connect wiring and power up

5 Connect wiring and power up
CAUTION
Do not connect the power across the test terminals. Power could
damage the test diode in the test connection. Twisted pairs yield best
results. Use 24 to 14 AWG wire and do not exceed 5,000 ft. (1500m).
Use the following steps to wire the transmitter:
Procedure
1. Remove the cover on the field terminals side of the housing.
2. Connect the positive lead to the “PWR/COMM +” terminal, and
the negative lead to the “PWR/COMM –” terminal.
3. If the optional process temperature input is not installed, plug
and seal the unused conduit connection. If the input is being
utilized, see Install optional process temperature input (Pt 100
RTD sensor) for more information.
NOTICE
When the enclosed pipe plug is utilized in the conduit opening,
it must be installed with a minimum engagement of five
threads to comply with explosion-proof requirements. Refer to
the Rosemount 3051SMV Reference Manual for more
information.
4. 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.
5. Reinstall the housing cover and tighten so that metal contacts
metal to meet explosion-proof requirements.
Figure 5-1 shows the wiring connections necessary to power
a Rosemount 3051SMV and enable communications with a
handheld Field Communicator.
January2024 Quick Start Guide
Quick Start Guide 15