Reference Manual
00809-0100-4075, Rev BA
October 2010
Smart Wireless THUM Adapter
3-6
Figure 3-7. Direct Mount Wiring
Diagram for 4-Wire Passive
Device
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 3-8. Remote Mount
Wiring Diagram for 4-Wire
Passive Device
Splice Connector
Wired Device
4-20 mA Loop -
4-20 mA Loop +
Ground
THUM Adapter
Green
Red
Black
White
Yellow
Powe
r+
Powe
r-
CO
MM+
CO
MM-
Power
+
Supply
-
Load Resistor
250
Remote Mount Housing
4-20 mA Loop -
4-20 mA Loop +
Ground
+ COMM
- COMM
THUM Adapter
Green
Red
Black
White
Yellow
To Wired Device
Shield Wire
Load Resistor
250
+ Power
- Supply
Summary of Contents for Rosemount Smart Wireless THUM
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