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Reference Manual
00809-0100-4026, Rev KC
Introduction
October 2018
Introduction
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
®
, FOUNDATION
™
Fieldbus or
Modbus
®
signal.
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
Note
For HART communication, a minimum load resistance of 250 within the loop is required.
A. Integral display F. 3 x 4-20 mA
B. Rosemount 5400 G. Tri-Loop
C. 4-20 mA/HART H. HART modem
D. Rosemount 751 Field Signal Indicator I. Rosemount Radar Master or AMS Suite
E. Field Communicator J. DCS
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