Emerson Rosemount 2051 Reference Manual page 105

Reference Manual
00809-0100-4101, Rev AA
July 2008
Table A-1.
Load Limitations
Maximum loop resistance is determined by the voltage level of the external
power supply, as described by:
Maximum Loop Resistance = 43.5 * (Power Supply Voltage – 10.5)
The HART communicator requires a minimum
loop resistance of 250Ω for communication.
™
F
OUNDATION
fieldbus (Output Code F)
Power Supply
External power supply required; transmitters operate on 9.0 to 32.0 V dc
transmitter terminal voltage.
Current Draw
17.5 mA for all configurations (including LCD display option)
Turn-On Time
Performance within specifications less than 20.0 sections after power is
applied to the transmitter.
F
OUNDATION
fieldbus Function Block Execution Times
Block
Resource
Transducer
LCD Block
Analog Input 1, 2
PID
F
OUNDATION
fieldbus Parameters
Schedule Entries
Links
Virtual Communications Relationships
(VCR)
Standard Function Blocks
Resource Block
Contains hardware, electronics, and diagnostic information.
•
Transducer Block
• Contains actual sensor measurement data including the sensor
diagnostics and the ability to trim the pressure sensor or recall factory
defaults.
Rosemount 2051
1387
1000
500
Operating
Region
0
10.5 20 30
Voltage (V dc)
Execution Time
-
-
-
30 milliseconds
45 milliseconds
7 (max.)
20 (max.)
12 (max.)
42.4
A-5