Emerson Smart Wireless THUM Adapter Reference Manual page 32

Section 3: Mounting
March 2014
Figure 3-21. Wiring diagram for 4-wire passive device
Figure 3-22. Wiring diagram for 4-wire passived device with resistor
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.
Figure 3-23. Wiring diagram for 4-wire active device
24
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 -
THUM Adapter
Green
Yellow
White
Black
Red
4-20 mA/HART +
4-20 mA/HART -
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
Splice Connector
Wired Device
4-20 mA Loop +
Ground
4-20 mA Loop -
Reference Manual
00809-0100-4075, Rev CA
Power +
Power -
Power +
Power -
Power +
Power -
Mounting