Ams trex™ Device Communicator

Figure 3-36: FOUNDATION fieldbus Power Plug attached to the Trex unit
Field Communicator application
User Guide
September 2021
100
User Guide

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Figure 3-37: FOUNDATION fieldbus terminals on the Device Communicator
communication module
A. FF terminals to communicate with a FOUNDATION fieldbus device
Figure 3-38: FOUNDATION fieldbus terminals on the Device Communicator Plus
communication module
A. FF pwr terminal provides power, power conditioning, and two terminators to one
FOUNDATION fieldbus device. Use the FOUNDATION fieldbus Power Plug to connect this
terminal to the red FF terminal.
B. FF terminals to communicate with a FOUNDATION fieldbus device
User Guide 
Field Communicator application
September 2021
User Guide 
101

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Related information
Wiring diagrams for FOUNDATION fieldbus devices and the Field Communicator
application
3.18.3
Wiring diagrams for FOUNDATION fieldbus devices and
the Field Communicator application
 CAUTION
Remove the USB cable from the Trex unit before connecting to a device.
 CAUTION
The Trex unit draws approximately 12 mA from the fieldbus segment when it is online.
(The Trex unit draws 0 mA when it is offline.) Ensure the power supply or barrier on the
fieldbus segment has the capacity to provide this additional current when the Trex unit is
online. If a heavily loaded fieldbus segment is drawing near the capacity of the segment’s
power supply, connecting the Trex unit may result in loss of communication.
Figure 3-39: Power and connect to a FOUNDATION fieldbus device
To power a FOUNDATION fieldbus device, the Trex unit needs the FOUNDATION fieldbus
Power Plug. When the Trex unit powers a device, it also provides two terminators and a
power conditioner.
 WARNING
The Trex unit can power only one FOUNDATION fieldbus device.
A. FOUNDATION fieldbus Power Plug
Field Communicator application
User Guide
September 2021
102
User Guide

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