Emerson AMS Trex User Manual

3.10.3 Wiring diagrams for the Smart Wireless THUM
™
Adapter
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.
Power the THUM adapter without a device attached and use 250 Ohm
resistor
Figure 3-18:
Connect the lead set to the red and black wires.
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? Positioner
Select Positioner because the Trex unit
needs to control/limit current due to
the lower value of the resistor.
Change Polling Option? Tap Yes and select the address for the
THUM adapter.
Field Communicator application
User Guide 69

Emerson AMS Trex Specifications

General

Brand	Emerson
Model	AMS Trex
Category	Cell Phone
Language	English