Rosemount 5402 - System Architecture of Radar Level Transmitter

Reference Manual
00809-0100-4026, Rev FA
July 2009
2-5
Rosemount 5400 Series
SYSTEM
ARCHITECTURE
The Rosemount 5400 Series Radar Transmitter 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 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 375 Field Communicator or a
PC with the Rosemount Radar Master software. Rosemount 5400 Series
transmitters can also be configured with the AMS
®
Suite and DeltaV™
software, and other tools that support Electronic Device Description
Language (EDDL) functionality.
For HART communication a minimum load resistance of 250within the loop
is required.
Figure 2-3. HART system
architecture
Integral
Display
Rosemount Radar Master or
AMS Suite
HART modem
375 Field
Communicator
Rosemount 751 Field
Signal Indicator
3 x 4-20 mA
DCS
Rosemount 5400 Series
Radar Transmitter
Tri-Loop
Note! For HART communication a
minimum load resistance of 250
within the loop is required.