The Trex unit must have the Device Communicator Plus communication module to power a THUM adapter.
When performing a bench configuration, the THUM adapter should be attached to a device. However, the Trex unit can power a THUM adapter when it is not connected to a HART device.
Connect the lead set to the HART + pwr terminals on the Trex unit
and the red/black wires on the THUM adapter.
THUM adapter wiring with 250 Ohm resistor
- In the Field Communicator application, tap HART.
- Tap Yes when prompted if you want the Trex unit to power the device.
- Tap Positioner.
- When prompted, change the polling address to 63.
Follow any additional prompts to connect to the THUM adapter.
The device menu is displayed.