AMS Trex 2 Device Communicator Simplifies Loop Diagnostics and Fieldbus Troubleshooting

Three Applications, One Handheld: Faster Troubleshooting with AMS Trex 2

The AMS Trex 2 Device Communicator from Emerson equips instrument technicians with three powerful applications – Field Communicator, Loop Diagnostics, and Fieldbus Diagnostics – that turn a single handheld device into a complete field service toolkit for HART and FOUNDATION fieldbus instruments.

Field Communicator: Smarter Device Configuration

The Field Communicator application lets technicians configure HART and FOUNDATION fieldbus devices with automatic device detection. When the application is opened, the Trex unit scans the most common connection scenarios and can automatically detect and connect to a HART device on an externally powered loop, a 4-wire HART device, a WirelessHART device, or a powered FOUNDATION fieldbus segment – eliminating the need to step through a connection wizard.

With EDDL technology, the Trex unit works with devices from virtually any manufacturer. Technicians can save frequently used menu items to a favorites list for instant access, simulate HART or FOUNDATION fieldbus devices for offline practice, and use the Upgrade Studio application to keep device descriptions current.

Loop Diagnostics: Isolate and Verify in Minutes

The Loop Diagnostics application helps technicians troubleshoot 4-20 mA current loop wiring by measuring current and isolating suspect devices. The Trex unit can power a transmitter or positioner directly, allowing technicians to verify the device in isolation and confirm its operation without relying on the loop.

• Measure loop current with 1 µA resolution
• Power and verify a transmitter or positioner on the bench
• Control current from 3 to 22.5 mA with 0.01% accuracy to move positioners or verify digital control system input modules
• Perform wiring continuity checks on unpowered cables

Fieldbus Diagnostics: Segment-Level Insight

For FOUNDATION fieldbus networks, the Fieldbus Diagnostics application provides segment-level troubleshooting, helping technicians identify wiring, power, and communication issues before they cause production interruptions.

Built for the Field

Rugged by design, the AMS Trex 2 survives a 1-meter drop onto concrete, carries an IP54 enclosure rating, and operates from -20 °C to +55 °C. Its 5.7-inch touchscreen and dedicated keypad make navigation easy even when wearing gloves, and the intrinsically safe version is approved for Zone 1/Zone 2, Group IIC, and Class I, Division 1/2 hazardous areas.

Reduce Downtime, Improve Reliability

By combining configuration, loop testing, and fieldbus diagnostics in one intrinsically safe handheld, the AMS Trex 2 helps plants reduce unplanned downtime, speed up troubleshooting, and keep instrument assets performing at their best. Its Bluetooth and Wi-Fi options further streamline data transfer and connectivity in the field.