Ams trex™ Device Communicator

Procedure
1. Place the Trex unit face down on a level, secure surface.
2. Lift up the stand.
3. Use a Torx
®
screwdriver to loosen and remove the two screws under the stand.
4. Remove the stand.
5. Place the new stand on the Trex unit.
AMS Trex Device Communicator overview
User Guide
September 2021
50
User Guide

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6. Insert and tighten the two screws. Do not over tighten the screws. Use 0.5Nm
maximum torque load.
2.17.2
Calibration
Calibration is not supported on the AMS Trex Device Communicator. Voltage, current,
signal, and noise measurements made by the Trex unit are intended for troubleshooting
purposes. NIST standards are not applicable to the AMS Trex Device Communicator.
User Guide 
AMS Trex Device Communicator overview
September 2021
User Guide 
51

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AMS Trex Device Communicator overview
User Guide
September 2021
52
User Guide

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3
Field Communicator application
The Field Communicator application lets you configure HART and FOUNDATION fieldbus
devices. (The fieldbus functionality requires a license.) You can do the following:
•
Power and connect to a HART transmitter, if the Trex unit has the Device
Communicator Plus communication module. The Trex unit has an internal resistor, so
you do not need to add a loop resistor.
•
Power and connect to a HART positioner, if the Trex unit has the Device Communicator
Plus communication module.
•
Power and connect to the Smart Wireless THUM
™
Adapter, if the Trex unit has the
Device Communicator Plus communication module.
•
Power and connect to a FOUNDATION fieldbus device, if the Trex unit has the Device
Communicator Plus communication module. The Trex unit provides power, power
conditioning, and two terminators.
•
Connect to an externally-powered HART or FOUNDATION fieldbus device.
•
Use the internal resistors in the Trex unit when connecting to an externally-powered
HART transmitter. The internal resistors in the Trex unit temporarily convert an
externally-powered 4-20 mA current loop into a HART loop.
•
Save menu items from HART devices to a list of favorites for quick access.
•
Simulate a HART or FOUNDATION fieldbus device.
Note
The Field Communicator application can be used with the Device Communicator
communication module or Device Communicator Plus communication module. However,
the Trex unit cannot power a HART or FOUNDATION fieldbus device with the Device
Communicator communication module.