Emerson Rosemount 2051 Reference Manual page 70

Section 4: Electrical Installation
April 2013
Figure 4-6. Wiring the transmitter (4-20 mA HART)
A. DC power supply
 250 (necessary for HART communication only)
B. R
L
Figure 4-7. Wiring the Transmitter (1-5 Vdc Low Power)
A. DC power supply
B. Voltmeter
Perform the following procedure to make wiring connections:
1.
2.
a.
3.
60
Remove the housing cover on terminal compartment side. Do not remove the cover in
explosive atmospheres when the circuit is live. Signal wiring supplies all power to the
transmitter.
For 4-20 mA HART output, connect the positive lead to the terminal marked
(pwr/comm+) and the negative lead to the terminal marked (pwr/comm -). Do not
connect the powered signal wiring to the test terminals. Power could damage the test
diode.
For 1-5 Vdc HART Output, connect the positive lead to (PWR +) and the negative to the
(PWR -). Do not connect the powered signal wiring to the test terminals. Power could
damage the test diode.
Plug and seal unused conduit connection on the transmitter housing to avoid moisture
accumulation in the terminal side.
Reference Manual
00809-0100-4107, Rev BA
A.
B.
A.
B.
Electrical Installation