Internal Resistors - Emerson AMS Trex User Manual

Field Communicator application
Figure 3-23:
3.11

Internal resistors

The Trex unit has internal resistors that can be used when the Trex unit powers a HART
transmitter, or when the HART transmitter is on a 4-20 mA current loop without a resistor.
The resistors are enabled through the device connection wizard in the Field Communicator
application.
Note
For positioners, the internal resistors in the Trex unit are disabled.
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HART Device List
User Guide