System Architecture - Emerson Rosemount 5402 Reference Manual

Introduction
October 2018
2.3

System architecture

The Rosemount 5400 is loop-powered, and uses the same two wires for power supply and output signal.
The output is a 4-20 mA analog signal superimposed with a digital HART
Modbus
By using the optional HART Tri-Loop™, the HART signal can be converted up to three additional 4-20 mA
analog signals.
With the HART protocol, multidrop configuration is possible. In this case, communication is restricted to
digital, since current is fixed to the 4 mA minimum value.
The transmitter can be connected to a Rosemount 751 Field Signal Indicator, or it can be equipped with
an integral display.
The transmitter can easily be configured using a Field Communicator or a PC with the Rosemount Radar
Master (RRM) software. Rosemount 5400 can also be configured with the AMS Suite and DeltaV™
software, and other tools that support Electronic Device Description Language (EDDL) functionality.
Figure 2-2. HART System Architecture
A
A.
B.
C.
D.
E.
Note
For HART communication, a minimum load resistance of 250  within the loop is required.
6
®
signal.
D
B
C
Integral display
Rosemount 5400
4-20 mA/HART
Rosemount 751 Field Signal Indicator
Field Communicator
H
E
F. 3 x 4-20 mA
G. Tri-Loop
H. HART modem
I. Rosemount Radar Master or AMS Suite
J. DCS
Reference Manual
00809-0100-4026, Rev KC
® ™
, F
OUNDATION
F
G
I
Fieldbus or
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Introduction