To make connections, perform the following procedure:
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.
Note
Do not connect the power across the test terminals. Power could damage the test
diode in the test connection.
3. If the optional process temperature input is not installed, plug and seal the unused
conduit connection. If the optional process temperature input is being utilized, see
Install optional process temperature input (Pt 100 RTD sensor) for more
information. When the enclosed pipe plug is utilized in the conduit opening, it must
be installed with a minimum engagement of five threads in order to comply with
flameproof/explosion-proof requirements.
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
flameproof/explosion-proof requirements.
Example
Figure 3-11 shows the wiring connections necessary to power a Rosemount 3051SMV and
enable communications with a Hand-held Field Communicator.
Figure 3-11: Transmitter Wiring
Without optional process temperature
connection
With optional process temperature connection
Reference Manual Installation
00809-0100-4803 October 2018
Emerson.com/Rosemount 85
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