Wiring Diagrams - Emerson Rosemount 2051 Reference Manual

Reference Manual
00809-0100-4101, Rev AA
July 2008

Wiring Diagrams

Figure 3-1. 4–20 mA HART Transmitter Wiring Diagrams
Figure 3-2. 1-5 Vdc HART Low Power Transmitter Wiring
Connect the equipment as shown in Figure 3-1 for 4-20 mA HART or
Figure 3-2 for 1-5 Vdc HART Low Power. To ensure successful
communication, a resistance of at least 250 ohms must be present between
the HART Communicator loop connection and the power supply. The HART
Communicator or AMS Device Manager may be connected at "COMM" on the
transmitter terminal block or across the load resistor. Connecting across the
"TEST" terminals will prevent successful communication for 4-20 mA HART
output.
Turn on the HART Communicator by pressing the ON/OFF key or log into
AMS Device Manager. The HART Communicator or AMS Device Manager
will search for a HART-compatible device and indicate when the connection is
made. If the HART Communicator or AMS Device Manager fail to connect, it
indicates that no device was found. If this occurs, refer to Section 5:
Troubleshooting.
Rosemount 2051
Power
Supply
≥ 250Ω
R
L
Voltmeter
Power
Supply
3-3