Emerson Smart Wireless THUM Quick Start Manual page 12

Quick Start Guide
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.
Figure 11. Remote Mount Wiring Diagram for 4-Wire Passive Device
A
Green
C
A. THUM Adapter
B. Remote mount housing
C. Ground
12
B
D
+ COMM
To Wired Device
- COMM
4 -20 mA Loop +
4 -20 mA Loop -
D. Shield wire
E. Load resistor ≥ 250 Ω
F. Power supply
June 2016
+
F
-
E