Emerson AMS Trex Device Communicator User Manual page 87

User Guide
3.13
User Guide
1.800.561.8187
Procedure
1. Connect the lead set to the HART + pwr terminals on the Trex unit and the red/black
wires on the THUM adapter.
Figure 3-31: THUM adapter wiring with 250 Ohm resistor
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
application
Disconnect a device
Connect to an externally-powered HART device
By default, the Trex unit tries to automatically connect to the device at address zero. See
Automatically connect to a HART device
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.
www.
Field Communicator application
™
Adapter and the Field Communicator
for more information.
information@itm.com
.com
September 2021
87