4 Connect wiring and power up
About this task
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 4-1 shows the wiring connections necessary to power a
Rosemount 3051SMV and enable communications with a hand-held
Field Communicator.
October 2018 Quick Start Guide
Quick Start Guide 11
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