Emerson AMS Trex Device Communicator User Manual page 74

Field Communicator application
September 2021
74
1.800.561.8187
Figure 3-15: Connect to a 4-wire HART transmitter
If you have a 250 Ohm resistor, you can insert it in between the device terminals and
connect the lead set across the resistor. Otherwise, you can enable the internal resistor in
the device connection wizard.
Note
Ensure you review the device documentation for connecting/setting up HART
communication. Devices may have different terminals or requirements.
A — Voltage source
Device connection wizard prompts
Do you intend to provide power from the
Trex unit?
Leads are attached to:
Change Polling Option?
Increase loop resistance?
Figure 3-16: Power and connect to a HART positioner
www.
Answer
No
Transmitter
Tap Yes if the device is not at address zero.
Tap Yes if there is no external resistor between the
device terminals.
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