22
Reference Manual
00809-0100-4021, Rev JA
Installation
April 2017
Installation
Power/current loop connections
Use copper wire of a sufficient size to ensure that the voltage across the transmitter power terminals
does not go below 12.0 Vdc.
1. Connect the current signal leads as shown in
2. Recheck the polarity and connections.
3. Turn the power ON.
For information about multichannel installations, refer to
Note
Do not connect the power/signal wiring to the test terminal. The voltage present on the power/signal
leads may burn out the reverse-polarity protection diode built into the test terminal. If the test terminal’s
reverse polarity protection diode is burned out by the incorrect power/signal wiring, the transmitter can
still be operated by jumping the current from the test terminal to the “–” terminal. See
(HART®/4–20 mA only)” on page 170
for use of the terminal.
Figure 2-13. Connecting a Field Communicator to a Transmitter Loop (HART/4–20 mA)
A. Power/signal terminals
B. 250
≤
R
L
≤
1100
C. Power supply
Note
The signal wire may be grounded at any point or left ungrounded.
Note
AMS Device Manager software or a Field Communicator can be connected at any termination point in
the signal loop. The signal loop must have between 250 and 1100 ohms load for communications.
A
C
or*
B
Summary of Contents for Rosemount 3144P
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Page 10: ...8 Reference Manual 00809 0100 4021 Rev JA Title Page April 2017 Title Page ...
Page 16: ...6 Reference Manual 00809 0100 4021 Rev JA Introduction April 2017 Introduction ...
Page 38: ...28 Reference Manual 00809 0100 4021 Rev JA Installation April 2017 Installation ...
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