Wiring Diagrams For The Smart Wireless Thum - Emerson AMS Trex User Manual

3.10.3

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
•
•
CAUTION!
Remove the USB cable from the Trex unit before connecting to a device.
Figure 3-18:
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?
User Guide
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.
Power the THUM adapter without a device attached and use 250 Ohm
resistor
Field Communicator application
™
Adapter
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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