The Emerson AMS TREX2 is the second-generation upgraded handheld field device communicator, a comprehensive iteration of the first-generation TREX designed for commissioning, calibration, loop diagnosis and troubleshooting of HART®, FOUNDATION Fieldbus and WirelessHART process instruments in chemical, pharmaceutical, power, oil & gas and food manufacturing plants.
Compared with the original TREX 1, TREX2 delivers an all-around upgrade in computing power, wireless communication, metering accuracy, field operability, data security and rugged enclosure performance. It adopts a quad-core high-performance processor and 4GB RAM (8x larger memory than the first-gen single-core 800MHz / 512MB configuration), supporting multi-task parallel debugging for batches of field transmitters and control valves without lagging. Built-in low-power Bluetooth enables wireless linkage with the dedicated mobile AMS Device Configurator App, allowing technicians to view loop and diagnostic data remotely without wired cables, improving safety for high-altitude and outdoor hazardous-area operations.
Equipped with a high-precision measurement module with full NIST traceable calibration for 4–20mA signals, TREX2 generates audit-ready calibration records that satisfy strict GMP and power plant compliance requirements. Its enhanced Power-the-Loop function directly powers all passive field instruments without external resistors or multimeters, simplifying on-site wiring workflows. The optimized industrial touchscreen supports thick safety glove operation, while the redesigned intrinsically safe housing features improved heat dissipation and anti-slip grip for stable continuous operation under wide temperature, high-temperature cabinet and outdoor dusty/wet conditions. A brand-new optimized embedded OS adds hierarchical access encryption to prevent unauthorized data deletion or program tampering, securing plant maintenance historical data. The unit preloads DD libraries for over 2,500 third-party instruments, supporting inline valve stroke, friction and dead-band diagnostics via built-in ValveLink software to reduce unplanned downtime.
Core Technical Specifications
Hardware & Performance
Processor: Quad-core high-performance CPU
Memory: 4GB operating RAM (vs 512MB single-core 800MHz in TREX Gen.1)
Display: 5.7-inch industrial resistive touch screen, glove-operable, adjustable backlight
Operating System: New streamlined embedded OS with role-based access control & data encryption
Battery: Rechargeable lithium-ion pack, minimum 8 hours continuous runtime; 3–4 hours full charging time
Physical Ruggedness: IP54 enclosure, 1-meter drop resistance test, anti-slip optimized housing structure with enhanced heat dissipation
Communication & Connectivity
Field Protocols: HART single protocol / HART + FOUNDATION Fieldbus dual protocol configurable
Wireless: Embedded Bluetooth 2.1 (10m range), Wi-Fi 802.11 b/g/n, USB 2.0 Micro port for data synchronization with AMS Device Manager
Power the Loop: Enhanced loop power supply, drives all passive transmitters without external auxiliary resistors
Measurement & Calibration
4–20mA Measurement: NIST-traceable high-precision dedicated module; calibration logs archivable as official audit evidence
Diagnostic Functions: Full loop troubleshooting, inline control valve health analysis (ValveLink), real-time device parameter reading & configuration
Environmental & Safety Certifications
Intrinsic Safety: ATEX / IECEx / CSA intrinsically safe certification for Class I hazardous chemical zones
Operating Temperature: -20°C ~ +55°C (-4°F ~ 122°F), stable under outdoor high heat and closed cabinet continuous operation
Shock & Moisture: IP54 dustproof and waterproof, suitable for all indoor and outdoor industrial maintenance scenarios
Software & Support
Pre-installed DD library supporting over 2,500 brands of transmitters, flowmeters, valve positioners and analytical instruments
Optional 1-year or 3-year official Emerson software upgrade & technical support packages
Full data auto-sync with AMS Device Manager via Wi-Fi/USB for centralized plant instrument asset management