Emerson Rosemount 3300 Series Reference Manual page 69

Reference Manual
00809-0100-4811, Rev AB
July 2003
Figure 4-19. Tri-Loop wiring.
5. Set the 3300 in Burst mode.
HART command [1, 4, 5, 2, 3].
RCT: Device Commands>Details>Set Burst Mode option.
6. Select Burst option 3=Process variables and current (Process vars/crnt).
HART command [1,4,5,2,4].
7. Install the Tri-Loop. Connect channel 1 wires, and optionally wires for
Channel 2 and Channel 3.
8. Configure Tri-Loop Channel 1:
a. Assign variable: Tri-Loop HART command [1,2,2,1,1].
Make sure that the SV, TV, and QV match the configuration of the
3300 transmitter.
b. Assign units: Tri-Loop HART command [1,2,2,1,2]. Make sure that
the same units are used as for the 3300 transmitter.
c. Set the Upper Range Value and the Lower Range Value: Tri-Loop
HART command [1,2,2,1,3-4].
d. Enable the channel. Tri-Loop HART command [1,2,2,1,5].
9. (Optional) Repeat steps a-d for Channels 2 and 3.
10. Connect wires to Tri-Loop Burst Input.
11. Enter the desired tag, descriptor and message information:
Tri-Loop HART command [1,2,3].
12. (Optional) If necessary, perform an analog output trim for Channel 1 (and
Channel 2 and 3 if they are used).
Tri-Loop HART command [1,1,4].
See the reference manual for the Model 333 HART Tri-Loop HART-to-Analog
Signal Converter for further information on how to install and configure the
Tri-Loop.
Rosemount 3300 Series
DIN Rail Mounted
HART Tri-Loop
HART Burst Command 3/
Analog Output
Intrinsically Safe Barrier
Each Tri-Loop
QV
Channel
recieves power
TV
from Control
Room
SV
Channel 1 must
be powered for
the Tri-Loop to
operate
Device recieves
power from
PV
Control Room
Control Room
4-25