Emerson AMS Trex User Manual

THUM adapter wiring with 250 Ohm resistorFigure 3-31:
2. In the Field Communicator application, tap HART.
3. Tap Yes when prompted if you want the Trex unit to power the device.
4. Tap Positioner.
5. When prompted, change the polling address to 63.
6. Follow any additional prompts to connect to the THUM adapter.
The device menu is displayed.
Related information
HART communication terminals
Wiring diagrams for the Smart Wireless THUM
™
Adapter and the Field Communicator
application
Disconnect a device
3.13 Connect to an externally-powered HART device
By default, the Trex unit tries to automatically connect to the device at address zero. See
Section 3.4.1 for more information.
CAUTION!
Remove the USB cable from the Trex unit before connecting to a device.
Note
The Trex unit acts as a secondary HART master on a HART loop.
Procedure
1. Connect the lead set to the HART terminals on the Trex unit and to the
communication terminals on the device. See the HART wiring diagrams topic for the
connection details.
If you want to use the Trex internal resistor, connect the Trex unit is series with the
device.
Field Communicator application
User Guide 81

Emerson AMS Trex Specifications

General

Brand	Emerson
Model	AMS Trex
Category	Cell Phone
Language	English