Emerson Rosemount 775THUM Reference Manual page 22

Mounting
January 2023
Figure 3-7: Direct Mount Wiring Diagram for 4-Wire Passive Device
A. THUM Adapter
B. Wired device
C. Ground
D. Splice connector
E. Load resistor ≥ 250 Ω
F. Power supply
Note
A passive loop exists when the wired device is not supplying power to the 4–20 mA loop. It
is important to verify if the wired device is operating in active or passive mode.
22
A
Green
Red
Black
White
Yellow
B
D
4 - 20 mA Loop +
C
4 -20 mA Loop -
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F
E