Rosemount 333 HART Tri-Loop, Product Manual

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HART Tri-Loop HART-to-Analog Signal Converter
2-2
SYSTEM OVERVIEW Figure 2-2 illustrates an installation where a Tri-Loop has been added
to a Model 3095 MV installation.
The Tri-Loop design allows three different rail mounting options:
asymmetrical 32mm G rail, symmetrical 35
3
7.5 mm top hat rail, and
symmetrical 35
3
15 mm top hat rail. Since the Tri-Loop is designed for
non-hazardous locations, the Tri-Loop can only be installed on the safe
side of an IS barrier.
In this type of installation, the Model 3095 MV is configured to output
HART Burst Command 3. The Tri-Loop converts each burst update to a
corresponding analog value for up to three process variables. Any of the
Model 3095 MV process variables can be provided via the Tri-Loop
(DP, AP, GP, PT, or flow).
For each desired analog output, a separate pair of wires is installed
from the Tri-Loop to the control room. However, Channel 1 wires must
be installed and powered for the Tri-Loop to operate.
The initial Model 3095 MV analog output is not altered by the Tri-Loop
installation.
UNPACKING THE HART
TRI-LOOP When custom configuration Tri-Loops are shipped, the filled-out
configuration data sheet (CDS) is included in the box. If the CDS is
separated from the configured Tri-Loop, the serial number on the side
of the Tri-Loop can be matched with the serial number written on the
CDS. A label is also printed on the side of the Tri-Loop identifying
configuration information.
FIGURE 2-2. Example Tri-Loop
Installation Site.
Model 3095
I.S. Barrier (See Transmitter Manual
for I.S. Barrier Requirements)
250
Ω
Power
Supply
Pri-
mary
Sec-
ondary
Ter-
tiary
Fourth
Con
tr
o
l
Inpu
ts
NON-HAZARDOUS AREA
30
95
/30
95_
08A