Emerson Smart Wireless THUM Adapter Reference Manual page 17

Reference Manual
00809-0100-0775, Rev AA
March 2009
Wiring
Figure 5. 4-Wire Sub-Device with Active 4–20 mA LOOP Plus THUM Wiring Diagram
NOTE:
In order for the THUM to function properly there must be 250 Ohms resistance in the
loop. If the 4–20 mA loop does not have 250 Ohms resistance, wire a 250 Ohm
resistor as shown in Figure 6.
Smart Wireless THUM Adapter