Emerson 3051S Specifikace stáhnout pdf (Strana 139)

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

1 2 ... 134 135 136 137 138 139 140 141 142 143 144 ... 239 240

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