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Reference Manual
00809-0100-4882, Rev AB
May 2019
Rosemount 5081FG
Section 4
HART/AMS
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-1
Field Communicator Signal Line Connections . . . . . . . . page 4-2
Field Communicator PC Connections . . . . . . . . . . . . . . . page 4-4
Off-Line and On-Line Operations . . . . . . . . . . . . . . . . . . . page 4-4
HART/AMS Menu Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-4
Field Communicator Start Cal Check Method . . . . . . . . . page 4-8
OVERVIEW
The HART field communicator is a hand-held communications interface
device. It provides a common communications link to all microproces-
sor-based instruments that are HART compatible. The field communicator has
a liquid crystal display (LCD) and keypad. A pocket-sized manual, included
with the field communicator, details the specific functions of the keypad keys.
To interface with the Rosemount 5081FG Analyzer, the field communicator
requires a termination point along the 4-20 mA current loop and a minimum
load resistance of 250 ohms between the field communicator and the power
supply.
The field communicator accomplishes its task using a frequency shift keying
(FSK) technique. With the use of FSK, high-frequency digital communication
signals are superimposed on the analyzer's 4-20 mA current loop. The field
communicator does not disturb the 4-20 mA signal, since no net energy is
added to the loop.
The field communicator may be interfaced with a personal computer (PC),
providing that special software has been installed. To connect the field com-
municator to a PC, an interface adapter is required. Refer to the proper field
communicator documentation regarding the PC interface option.
Содержание Rosemount 5081FG
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Страница 97: ...Reference Manual 00809 0100 4882 Rev AB June 2019 Rosemount 5081FG EC Declaration of Conformity ...
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