Figure 5-2: Load Limitation
Maximum loop resistance = 43.5 x (power supply voltage – 12.0)
1322
1000
500
0
12.0 20 30
42.4
Voltage (Vdc)
Load (Ohms)
Operating
region
HART communication requires a minimum loop resistance of 250Ω
5.3 Install optional process temperature input (Pt 100
RTD sensor)
Note
To meet ATEX/IECEx Flameproof certification, only ATEX/IECEx
Flameproof cables (temperature input code C30, C32, C33, or C34)
may be used.
Procedure
1. Mount the Pt 100 RTD sensor in the appropriate location.
Note
Use shielded four-wire cable for the process temperature
connection.
2. Connect the RTD cable to the Rosemount 3051SMV by
inserting the cable wires through the unused housing conduit
and connect to the four screws on the transmitter terminal
block. An appropriate cable gland should be used to seal the
conduit opening around the cable.
3. Connect the RTD cable shield wire to the ground lug in the
housing.
January2024 Quick Start Guide
Quick Start Guide 17
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