Installation manual

16
Reference Manual
00809-0100-4075, Rev CA
Section 3: Mounting
March 2014
Mounting
3.2.4 Load resistor
If required, add a load resistor as shown in Figure 3-20, Figure 3-22, and Figure 3-24. The
resistor should be adequately rated for the application (1W minimum) and be compatible with
the supplied splice connector which accepts wire sizes from 14 to 22 AWG.
3.2.5 Wiring
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.
Figure 3-3. Direct mount wiring diagram for 2-wire device
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, Figure 3-10, or Figure 3-13 as applicable.
Splice Connector
Wired Device
4-20 mA Loop -
4-20 mA Loop +
Ground
- PWR / COMM
+ PWR / COMM
THUM Adapter
Green
Red
Black
White
Yellow
Load Resistor 250

Power +
Supply-