10
INSTALLATION (Continued)
WIRING (Continued)
NOTE: The internal and external options for the pull up resistance and voltage is selectable
by the header on the 4-20mA board (see Figures 4a & 4b).
When the Jumper is on the top two pins, the “external resistor required” option is selected
(Figure 4a). This external resistor can be installed as shown on Figure 3, but could also be
built into the existing customer equipment.
When the Jumper is located on the bottom two pins, the “internal resistor” option is selected
(Figure 4b).
Figure 4a
Figure 4b
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