Emerson AMS Trex Device Communicator User Manual page 69

User Guide
3.10
3.10.1
User Guide
1.800.561.8187
Icon Description
The option is an image.
No icon The option is a process variable. The process variable value may or may not be
displayed, depending on the device description for the device.
Connections to HART devices
The Trex unit can communicate with a device from the control room, on the bench, or any
wiring termination point in the loop. Review the HART wiring diagrams to ensure the Trex
unit is correctly connected to the device.
Note
The Trex unit acts as a secondary HART master on a HART loop.
Related information
Internal resistors
HART communication terminals
The Trex unit has communication terminals that enable it to communicate with a HART
device. Insert the lead set into the red and black terminals and connect to a HART device.
Note
The lead set must be used to communicate with a wired or wireless device.
Figure 3-9: HART communication terminals on the Device Communicator
communication module
A. Communicate with an externally-powered HART device
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September 2021
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