Power and control current to a positioner
Figure 4-6:
The Trex unit measures both voltage and current from the HART + pwr terminals.
Connect to an externally-powered positioner in-parallel
Figure 4-7:
The Trex unit measures voltage from the HART terminals. Voltage measurements can be taken at various
points to identify voltage drops along the loop.
A.
Current source
Loop Diagnostics application
132
User Guide
Summary of Contents for AMS Trex
Page 1: ...User Guide Rev 3 August 2017 AMS Trex Device Communicator User Guide ...
Page 8: ...Contents vi User Guide ...
Page 130: ...Field Communicator application 122 User Guide ...
Page 186: ...Fieldbus Diagnostics application 178 User Guide ...
Page 198: ...Technical specifications 190 User Guide ...
Page 206: ...Glossary 198 User Guide ...