Key Parameters and Features
Core Features & Advantages
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Power the Loop Without External Equipment: The Plus (L) module includes a built-in HART power supply with an internal 167 Ω resistor, enabling technicians to power a field device directly from the communicator—even before power and I/O infrastructure are in place . This eliminates the need for external power supplies or loop resistors during bench configuration and field commissioning.
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NIST-Traceable Measurement for Calibration: The TREX2 Plus module is calibrated to NIST-traceable standards, with mA measurement accuracy suitable for official calibration activities—not just reference readings. This allows technicians to perform 4-20 mA loop checks and device calibrations with a single handheld tool .
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Bluetooth Connectivity and Modern Platform: The TREX2 runs on a quad-core processor with embedded Bluetooth technology for wireless communication with Bluetooth-enabled field devices. The modern platform delivers faster response times and an intuitive mobile-device-like user experience .
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Intrinsically Safe for Hazardous Areas: The KL certification includes ATEX, CSA, and IECEx intrinsic safety approvals (including FISCO), allowing use in Zone 1, Zone 2, Class I Division 1, and Division 2 hazardous locations .
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Automatic Data Synchronization with AMS Device Manager: Field changes made on the communicator automatically synchronize with AMS Device Manager via Wi-Fi or USB. Every change is recorded and time-stamped, maintaining data integrity in the plant's asset management database without manual transcription .
Typical Applications
The TREX2LHPKLWS3 is widely used for HART field device management across process industries:
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Oil & Gas: HART transmitter commissioning and diagnostics in hazardous areas
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Chemical & Petrochemical: Device configuration and loop troubleshooting in Zone 1/Division 1 environments
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Power Generation: Instrument calibration and maintenance in turbine and boiler control loops
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Pharmaceutical: NIST-traceable calibration of critical process instruments in regulated environments
Frequently Asked Questions (FAQ)
Q1: What does the model number TREX2LHPKLWS3 indicate?
A: TREX2 = Gen 2 platform; L = Device Communicator Plus module (loop power, ammeter); H = HART Application; P = Li-Ion power module; KL = ATEX/CSA/IECEx IS certifications; W = Wireless; S3 = 3-year Standard Support .
Q2: Can this model power a HART device without external power?
A: Yes. The Plus (L) module includes Power the Loop functionality, allowing the communicator to power HART devices directly. This is useful for bench configuration and field commissioning before I/O infrastructure is available .
Q3: Does the TREX2LHPKLWS3 support FOUNDATION Fieldbus?
A: No. The H in the model number indicates HART only. Foundation Fieldbus support requires a model with F instead of H (e.g., TREX2LFPKLWS3) .
Q4: Is this device intrinsically safe?
A: Yes. The KL certification includes ATEX, CSA, and IECEx intrinsic safety approvals, suitable for Zone 1, Zone 2, Class I Division 1, and Division 2 hazardous areas .
Q5: What is the difference between TREX2 and the first-generation TREX?
A: The TREX2 features a quad-core processor, 64 GB flash memory, NIST-traceable mA measurement, and embedded Bluetooth. The first-generation TREX used an 800 MHz processor, 2 GB NAND flash, and had reference-only measurement accuracy .
Q6: What is included with the communicator?
A: AC adapter, USB cable, lead sets with connectors, hand strap, quick start guide, and installation DVD. The ValveLink Mobile application is available at no charge once the Trex unit is activated .
Recommended Models & Related Products
Choosing the Right Model
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For HART applications requiring loop power and NIST-traceable measurement: The TREX2LHPKLWS3 is the correct choice with the Plus (L) module for bench configuration and field commissioning .
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For HART + FOUNDATION Fieldbus applications: Select a model with F instead of H, such as TREX2LFPKLWS3 .
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For extended warranty coverage: Consider the TREX2LHPKLWP3 with 3-year Premium Support (includes accidental damage coverage) .
