Reference Manual
00809-0100-4801, Rev FA
October 2010
7-35
Rosemount 3051S Series
1. Check the 3051S variable mapping and remap as necessary to assign
the three variables intended to be the Tri-Loop output. Take note of the
variable information including variable, variable name, and variable units
as it will be necessary to duplicate this exactly in the Tri-Loop for proper
operation. Some useful variables for process diagnostics include
Standard Deviation, Mean, Coefficient of Variation, and Sensor
Temperature.
NOTE
The measured pressure will continue to be reported as a 4 – 20 mA value via
the primary variable output.
2. Connect the 3051S to the 333 Tri-Loop. The 3051S 4-20mA output
connects to the 333 Burst Input. See Figure 7-28.
Figure 7-28. 333 Tri-Loop Wiring
Diagram
3. Configure the Tri-Loop. The Channel configuration must be identical to
the variables mapped in the 3051S. Note: The Tri Loop default address
is 1. The HART host must be configured to Poll for the 333 in order to
find the Tri-Loop.
4. Enable Burst mode in the 3051S. The Burst Mode must be ON and the
Burst Option must be set to Process Vars/Crnt.
HAZARDOUS
AREA
Intrinsically Safe Barrier
Rosemount 3051S
DIN
Rail Mounted
HART Trip-Loop
Ch. 3
Ch. 2
Ch. 1
Burst Input
to Tri-Loop
RL 250
HART Burst Command 3/
Analog Output
Control Room
Device
receives power
from Control
Room
Channel 1 must
be powered for
the Tri-Loop to
operate
Each Tri-Loop
Channel
receives
power from
Control Room
NON HAZARDOUS AREA
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