Emerson Smart Wireless THUM Reference Manual page 22

Smart Wireless THUM Adapter
Wiring
Figure 3-3. Direct Mount Wiring
Diagram for 2-Wire Device
Figure 3-4. Remote Mount
Wiring Diagram for 2-Wire
Device
3-4
NOTE:
In order for the THUM Adapter to function properly there must be at least 250
Ohms resistance in the loop. If the 4–20 mA loop does not have the required
resistance, wire a resistor as shown in Figure 3-20, Figure 3-22, or
Figure 3-24 as applicable.
When adding a load resistor ensure that uninsulated conductors do not
contact the enclosure and/or other exposed metal parts.
THUM Adapter
Green
Red
Black
White
Yellow
NOTE:
In order for the THUM Adapter to function properly there must be at least 250
Ohms resistance in the loop. If the 4–20 mA loop does not have the required
resistance, wire a resistor as shown in Figure 3-6, 3-10, or 3-13 as applicable.
THUM Adapter
Red
Black
Green
Ground
White
Yellow
+ COMM
- COMM
Wired Device
Ground
- PWR / COMM
+ PWR / COMM
Remote Mount Housing
4-20 mA Loop +
4-20 mA Loop -
Shield Wire
To Wired Device
Reference Manual
00809-0100-4075, Rev BA
October 2010
4-20 mA Loop +
+
Power
4-20 mA Loop -
-
Supply
Splice Connector
Load Resistor 250 
+
Power
-
Supply
Load Resistor 250 