Emerson AMS Trex User Manual page 164

Fieldbus Diagnostics application
Figure 5-3:
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 in a bench setup.
A.
Figure 5-4:
For small fieldbus segments, the power conditioner and terminators can be contained in a single wiring
block.
Note
You can connect the Trex unit at any convenient place along the fieldbus segment (bus). In the field, this is
typically done at the device or at the fieldbus junction box. The drawing below is one example.
A.
B.
C.
D.
156
Power and connect to a FOUNDATION fieldbus device
FOUNDATION fieldbus Power Plug
Connect to an externally-powered fieldbus segment
Terminators
Power conditioner
Fieldbus power supply
Host system
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