Emerson Smart Wireless THUM Reference Manual page 30

Smart Wireless THUM Adapter
Figure 3-20. Wiring Diagram for
2-Wire Device with Resistor
Figure 3-21. Wiring Diagram for
4-Wire Passive Device
Figure 3-22. Wiring Diagram for
4-Wire Passive Device with
Resistor
3-12
THUM Adapter
Green
Red
Black
White
Yellow
NOTE
A passive loop exists when the wired device is not supplying power to the
4-20 loop. It is important to verify if the wired device is operating in active or
passive mode.
THUM Adapter
Green
Red
Black
White
Yellow
4-20 mA/HART +
4-20 mA/HART -
THUM Adapter
Green
Red
Black
White
Yellow
4-20 mA/HART +
4-20 mA/HART -
NOTE
An active loop exists when the wired device is supplying power to the 4-20
mA loop. It is important to verify if the wired device is operating in an active or
passive mode.
Reference Manual
00809-0100-4075, Rev BA
Wired Device
Ground
4-20 mA Loop +
4-20 mA Loop -
Resistor
- PWR / COMM
Splice Connector
+ PWR / COMM
Wired Device
Splice Connector
4-20 mA Loop +
Ground
4-20 mA Loop -
Splice Connector
Wired Device
4-20 mA Loop +
Ground
4-20 mA Loop -
Resistor
October 2010
Power +
Power -
Power +
Power -