The Trex unit may automatically display the device on the Device List if the device is on a fieldbus segment that has a host system or a FOUNDATION fieldbus device that is the LAS.
The Trex unit will become the LAS if it is connected to an externally-powered FOUNDATION fieldbus device on a fieldbus segment with no communications.
CAUTION:
Remove the USB cable from the Trex
unit before connecting to a device.