Figure 4-10: Read current for an analog output loop check
The Trex unit is connected to an analog output and is measuring current from the mA
terminals. You can connect the Trex unit at various points on the current loop, including a
junction box, device connection point, etc.
WARNING
Do not connect the mA terminals on the Trex unit to a power supply that is not current
limited to 250 mA. This can blow a fuse inside the Trex unit. The repair/replacement will
need to be completed at an authorized service center.
A. Analog output
Figure 4-11: Connect to an externally-powered positioner and read current
A. Analog output
User Guide Loop Diagnostics application
September 2021
User Guide 137
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