Emerson AMS Trex Device Communicator User Manual page 76

Field Communicator application
September 2021
3.10.3
76
1.800.561.8187
Wiring diagrams for the Smart Wireless THUM
and the Field Communicator application
Below each diagram, a table lists the expected prompts from the device connection wizard
and the answers to select to complete the connection.
If you are using a WirelessHART adapter that is not the Smart Wireless THUM adapter,
review its documentation before connecting the Trex unit.
Note
• Ensure you review the documentation included with the THUM adapter for additional
information.
• The Trex unit acts as a secondary HART master on a HART loop.
CAUTION
Remove the USB cable from the Trex unit before connecting to a device.
Figure 3-18: Power the THUM adapter without a device attached and use 250 Ohm
resistor
Connect the lead set to the red and black wires.
Device connection wizard prompts
Do you intend to provide power from the Trex unit?
Are you providing power to a transmitter or positioner?
Change Polling Option?
www.
Answer
Yes
Positioner
Select Positioner because the Trex unit
needs to control/limit current due to
the lower value of the resistor.
Tap Yes and select the address for the
THUM adapter.
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