Emerson AMS Trex Device Communicator User Manual page 105

User Guide
3.19
User Guide
1.800.561.8187
Figure 3-41: Fieldbus Device List
Power and connect to a FOUNDATION fieldbus
device
The Trex unit can power one FOUNDATION fieldbus device. The Trex unit can provide
approximately 10 volts at 25 mA to power a FOUNDATION fieldbus device. (The Trex unit
will draw approximately 12 mA when it is online).
If you try to apply power from the Trex unit when the device is externally-powered, the
Field Communicator application prevents the Trex unit from supplying power. This
protects the Trex unit from damage.
Note
When the Trex unit powers a FOUNDATION fieldbus device, two internal terminators and a
power conditioner are applied. Ensure the device is not connected to a fieldbus segment,
even if the segment is unpowered.
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September 2021
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