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Manual
MS-00809-0100-3625
5.1.4
HART
The Rosemount 625IR has a HART digital protocol superimposed on the current loop
output.
The document, Rosemount 625IR HART Interface Instruction, describes the HART commands.
HART
A HART master requires a minimum loop resistance of 250 ohm for communication.
Figure 5-1: HART source configuration
A. HART device
Figure 5-2: HART sink configuration
A. HART device
Rosemount 625IR
®
electrical connection
®
Troubleshooting
January 2024
51
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