Reference Manual
00809-0100-4801, Rev FA
October 2010
Rosemount 3051S Series
A-8
Load Limitations
Maximum loop resistance is determined by the voltage level of the external power supply, as
described by:
Advanced HART Diagnostics Suite
(Option Code DA2)
Statistical Process Monitoring (SPM) provides statistical data (standard deviation, mean,
coefficient of variation) that can be used to detect process and process equipment
anomalies, including plugged impulse lines, air entrainment, pump cavitation, furnace flame
instability, distillation column flooding and more. This diagnostic allows you to take
preventative measures before abnormal process situations result in unscheduled downtime
or rework.
Power Advisory diagnostic proactively detects and notifies you of degraded electrical loop
integrity before it can affect your process operation. Example loop problems that can be
detected include water in the terminal compartment, corrosion of terminals, improper
grounding, and unstable power supplies.
The enhanced EDDL Device Dashboard presents the diagnostics in a graphical, task-based
interface that provides single click access to critical process/device information and
descriptive graphical troubleshooting.
Suite includes: Statistical Process Monitoring (SPM), Power Advisory, Status Log, Variable
Log, Advanced Process Alerts, Service Alerts, and Time Stamp capability.
Power Supply
External power supply required; transmitters operate on 9.0 to 32.0 Vdc transmitter terminal
voltage.
Current Draw
17.5 mA for all configurations (including LCD display option)
3051S
Maximum Loop Resistance = 43.5 * (Power Supply Voltage – 10.5)
The Field Communicator requires a minimum
loop resistance of 250
for communication.
3051S with HART Diagnostics
(option code DA2)
Maximum Loop Resistance = 43.5 * (Power Supply Voltage – 12.0)
The Field Communicator requires a minimum
loop resistance of 250
for communication.
Voltage (Vdc)
Load (Ohms)
Operating
Region
1387
1000
500
0
10.5 20 30
42.4
Voltage (Vdc)
Load (Ohms)
Operating
Region
1322
1000
500
0
12.0 20 30
42.4
(12 strony)
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