Emerson Rosemount 3051S Manual Supplement page 11

Manual Supplement
00809-0100-4851, Rev AA
2.5 Power up transmitter
This section provides the steps needed to power up transmitters. These steps are unique based on the
specific protocol used.
Steps for HART transmitters begin on

Steps for F

Steps for WirelessHART

2.5.1 Connect wiring and power up for wired HART configuration
Use the following steps to wire the transmitter:
1. Remove and discard orange conduit plugs.
2. Remove the housing cover labeled "Field Terminals."
3. Connect the positive lead to the "+" terminal, and the negative lead to the "–" terminal.
Note
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 AWG to 14 AWG wire and do not exceed 5,000 feet (1500 meters). For single
compartment housing (Junction Box housing), shielded signal wiring should be used in high EMI/RFI environments.
4. 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 ferrule wire terminal is not recommended as the connection may be more susceptible to
loosening over time or under vibration.
5. 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
temperature input (Pt 100 RTD sensor)" on page 16
Note
When the enclosed threaded plug is utilized in the conduit opening, it must be installed with a minimum thread
engagement in order to comply with explosion-proof requirements. For straight threads, a minimum of seven
threads must be engaged. For tapered threads, a minimum of five threads must be engaged.
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. Reinstall the housing cover and tighten so the cover is fully seated with metal to metal contact
between the housing and cover in order to meet explosion proof requirements.
Figure 1-6
communications with a handheld Field Communicator.
Rosemount 3051S High Pressure
™
Fieldbus transmitters begin on
OUNDATION
®
transmitter begin on
shows the wiring connections necessary to power a wired HART transmitter and enable
page 11.
page 17.
page 18.
for more information.
Rosemount 3051S High Pressure
"Install optional process
2017
11