Figure 3-11: Power and connect to a 2-wire HART transmitter
Note
When the Trex unit powers the HART transmitter, an external resistor is not needed. The
Trex unit uses an internal resistor that is automatically used when you enable the Trex unit
to power the transmitter.
Note
Do not insert a resistor in parallel with either the HART+pwr or HART terminals on the Trex
unit, or in parallel with the device's communication terminals. This may prevent
communications.
Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Yes
Are you providing power to a transmitter or positioner?
Transmitter
Change Polling Option? Tap Yes if the device is not at address
zero.
User Guide Field Communicator application
September 2021
User Guide 71
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