Connect To An Externally-Powered Foundation Fieldbus Device - Emerson AMS Trex User Manual

6.
7.
Related information
3.20 Connect to an externally-powered
FOUNDATION fieldbus device
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.
Procedure
1.
User Guide
From the Device List, tap the desired device.
The device menu displays.
To stop powering the FOUNDATION fieldbus device, close the Field Communicator
application or remove the lead set.
Wiring diagrams for FOUNDATION fieldbus devices and the Field Communicator
application
Disconnect a device
Connect the lead set to the FF terminals on the Trex unit and the device.
Figure 3-43: Example of connection to the fieldbus segment
A. Terminators
B. Power conditioner
C. Fieldbus power supply
D. Host system
Field Communicator application
103