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- Emerson
- TREXLFPKLWS3S
- AMS Trex Device Communicator
- USA
- 201 × 61.1 × 141 mm
- 1.33 kg
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Product Overview
The Emerson TREXLFPKLWS3S AMS Trex Device Communicator is a handheld field instrument communicator used to configure, diagnose and troubleshoot intelligent process instruments. It combines HART and FOUNDATION Fieldbus communication capabilities in a portable unit, allowing instrumentation technicians to work directly at the field device instead of relying exclusively on a control-room workstation.
The model code identifies a configuration with a Device Communicator Plus communication module, HART and FOUNDATION Fieldbus applications, a rechargeable lithium-ion power module, wireless capability and an intrinsically safe certification option. These configuration details matter when selecting a replacement or adding a communicator to an existing instrumentation maintenance team.
In a process plant, a pressure transmitter may report an unexpected value even though the control system shows no obvious hardware fault. A technician can connect the Trex communicator at the instrument, inspect its configuration and diagnostic information, and determine whether the problem relates to device settings, the measurement process or the communication loop. Similar workflows apply to temperature transmitters, flow instruments, level measurement devices and compatible digital valve controllers.
The Device Communicator Plus configuration also supports HART loop-powered device work and current-loop diagnostics. This is useful during commissioning, when an instrument must be configured before the permanent power and I/O infrastructure is available, or when maintenance personnel need to investigate a 4–20 mA loop at the installation.
The TREXLFPKLWS3S is a field maintenance tool rather than a PLC, DCS controller or permanent process transmitter. Its value lies in accessing instrument configuration and diagnostic information at the point of installation, helping technicians resolve field-device issues with fewer separate tools.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Emerson |
| Model / Order Number | TREXLFPKLWS3S |
| Product Family | AMS Trex |
| Product Type | Handheld Device Communicator |
| Communication Module | Device Communicator Plus |
| Supported Instrument Protocols | HART and FOUNDATION Fieldbus |
| Power Module | Rechargeable lithium-ion battery |
| Wireless Configuration | Wireless |
| Product Certification Option | KL — intrinsically safe certification configuration |
| Display Type | Color VGA resistive touchscreen |
| Display Size | 5.7 in (14.5 cm) |
| Display Resolution | 640 × 480 pixels |
| Processor | 800 MHz ARM Cortex-A8 / NXP |
| RAM | 512 MB DDR3 SDRAM |
| Internal Storage | 2 GB NAND flash and 32 GB extended flash |
| Operating System | Windows Embedded Compact 2013 |
| Battery Operating Time | 8+ hours of typical use |
| Enclosure Rating | IP54 |
| Operating Temperature | −20 to +55°C |
| HART Loop Current Measurement Range | 3–22.5 mA, using the applicable communicator module configuration |
| Dimensions | 201 × 61.1 × 141 mm |
| Weight | 1.33 kg |
Product Features
- Dual-protocol communication: Supports HART and FOUNDATION Fieldbus instrument configuration and diagnostics.
- Device Communicator Plus module: Adds HART loop-power and current-measurement functions for supported field maintenance tasks.
- Portable touchscreen interface: Allows technicians to navigate instrument menus and review device information at the installation.
- Rechargeable battery operation: Supports field work without requiring a continuous external power connection to the communicator.
- Wireless connectivity: Supports wireless functions included in the selected configuration.
- Intrinsically safe configuration: The KL option identifies a safety-certified configuration for applicable hazardous-area work, subject to its certification conditions.
- Field diagnostics: Provides access to instrument status, configuration parameters and available diagnostic information.
- Configuration records: Supports field-device configuration management and synchronization workflows with compatible AMS software.
- Replaceable communication modules: The AMS Trex platform supports interchangeable communication modules, subject to the applicable model and safety requirements.
Working Principle
The AMS Trex Device Communicator exchanges digital communication signals with compatible intelligent instruments. After the technician establishes the appropriate physical connection, the communicator identifies the device and presents the functions supported by its communication protocol and device description.
For a HART instrument, the communicator communicates over the HART interface associated with the instrument’s current loop. It can access supported parameters, review device status and perform configuration tasks. With the Device Communicator Plus module, the selected configuration also supports powering compatible HART devices in a bench setup and measuring loop current within its specified operating range.
FOUNDATION Fieldbus instruments use a different communication architecture. The communicator connects through its fieldbus terminals to access supported device information and perform diagnostic work. The applicable fieldbus connection and segment conditions must be observed when connecting to an operating installation.
Consider a pressure transmitter that has been replaced during a maintenance shutdown. Before the instrument is returned to service, the technician can use the Trex communicator to review its configured range, engineering units, device status and other available parameters. The technician can then compare these settings with the instrument requirements and check that the device communicates correctly.
The communicator does not independently validate the entire control loop or guarantee that the process measurement is correct. A complete investigation may still require checking the sensor installation, impulse lines, wiring, power supply, control-system scaling and process conditions.
Role in a Process Instrumentation Maintenance System
The TREXLFPKLWS3S acts as the portable interface between maintenance personnel and compatible intelligent field instruments. It complements the plant’s control and asset-management systems rather than replacing them.
Field Instrument → HART / FOUNDATION Fieldbus Connection → AMS Trex Device Communicator → Configuration, Diagnostics and Maintenance Records
| System Component | Function | Relationship to the AMS Trex |
|---|---|---|
| Pressure Transmitter | Measures process pressure | Allows technicians to inspect supported parameters and diagnostics |
| Temperature Transmitter | Converts sensor signals into a process measurement | Supports configuration and instrument troubleshooting |
| Flow Transmitter | Measures process flow | Provides access to available device settings and status |
| Level Instrument | Measures liquid or material level | Helps technicians investigate device configuration and diagnostic conditions |
| Digital Valve Controller | Monitors and controls valve position | Supports compatible device communication and diagnostic workflows |
| HART Communication Loop | Carries digital communication alongside the applicable analog signal | Provides the communication path for HART instruments |
| FOUNDATION Fieldbus Segment | Connects compatible field devices over a digital bus | Provides the communication path for supported fieldbus instruments |
| Device Communicator Plus Module | Provides the selected HART and current-loop functions | Enables supported field-device communication and loop-related tasks |
| Plant PLC or DCS | Executes control logic and processes instrument signals | Receives process information from the installed instrumentation |
| AMS Device Manager | Manages supported device information and configuration records | Supports configuration synchronization and maintenance documentation |
| Instrument Power Supply | Powers the installed field instrument | Supplies the field device independently of communicator functions where applicable |
| Field Wiring and Terminals | Connect the instrument to the process-control system | Must be checked when investigating communication or measurement faults |
Industrial Applications
| Application | Typical Equipment | Role of the AMS Trex |
|---|---|---|
| Oil and Gas Processing | Pressure, temperature and flow transmitters | Supports instrument configuration and field troubleshooting |
| Chemical Manufacturing | Process transmitters and digital valve controllers | Provides access to device parameters and diagnostic information |
| Water and Wastewater Treatment | Level, pressure and flow instruments | Helps maintenance teams investigate instrument faults at the installation |
| Power Generation | Process measurement and control-valve instrumentation | Supports commissioning and routine instrument maintenance |
| Pharmaceutical Production | Intelligent process instruments | Helps technicians check device settings and maintenance status |
| Food and Beverage Processing | Temperature, pressure and flow measurement devices | Supports field-device checks during maintenance and commissioning |
| Pulp and Paper Production | Flow transmitters and control-valve assemblies | Provides a portable interface for compatible instrument diagnostics |
| Industrial Utilities | Steam, compressed-air and water measurement systems | Helps technicians inspect instrument configuration and communication |
Installation and Maintenance
- Verify the communicator configuration: Check that TREXLFPKLWS3S matches the required HART, FOUNDATION Fieldbus, power-module, wireless and certification configuration.
- Inspect the battery module: Check the rechargeable power module and its connections before taking the communicator into the field.
- Check the safety certification: Confirm that the device’s actual certification label and approval conditions permit the intended hazardous-area use.
- Identify the field instrument: Record the instrument model, communication protocol and required maintenance task before connecting the communicator.
- Select the correct communication terminals: Use the appropriate HART or FOUNDATION Fieldbus connection for the instrument being serviced.
- Observe loop conditions: Verify the electrical conditions and connection method required for the selected protocol before attaching the communicator.
- Use loop power appropriately: When powering a HART device from the communicator, confirm that the instrument and intended setup are compatible with the module’s power function.
- Check current-measurement requirements: Use the applicable current-loop terminals and follow the specified connection procedure when measuring loop current.
- Review device configuration: Check the available range, units, identification, status and other parameters relevant to the instrument’s function.
- Inspect communication quality: If the instrument cannot be accessed, check wiring, terminal connections, loop conditions and protocol compatibility before changing device settings.
- Verify the instrument after configuration: Confirm that the required parameters have been applied and that the instrument responds as expected before returning it to normal service.
- Record maintenance results: Document configuration changes, diagnostic findings, instrument identification and any relevant follow-up work in the plant’s maintenance records.
Compatible System Components
| Component | Function | Compatibility Consideration |
|---|---|---|
| HART Pressure Transmitter | Measures process pressure and communicates digitally | Confirm HART support and the device’s available communication functions |
| HART Temperature Transmitter | Processes temperature sensor signals | Verify supported HART communication and device descriptions |
| HART Flow Transmitter | Measures flow and reports device information | Check protocol compatibility and supported parameters |
| FOUNDATION Fieldbus Instrument | Communicates over a digital fieldbus segment | Verify fieldbus protocol support and connection requirements |
| Digital Valve Controller | Monitors and adjusts control-valve position | Confirm support for the applicable device communication protocol |
| Device Communicator Plus Module | Provides additional communication and loop functions | Match the module configuration to the intended field task |
| Rechargeable Power Module | Supplies portable operating power | Use the appropriate compatible battery module |
| HART Loop Wiring | Carries the HART communication signal | Follow the instrument’s connection and loop requirements |
| FOUNDATION Fieldbus Segment Wiring | Connects fieldbus devices | Observe the segment’s electrical and installation requirements |
| AMS Device Manager | Manages supported instrument configuration information | Verify the software version and applicable synchronization workflow |
Recommended Related Models
| Model / Product | Product Type | Relationship | Selection Consideration |
|---|---|---|---|
| Emerson TREXLFPKLWS3S | AMS Trex Device Communicator | Requested HART and FOUNDATION Fieldbus configuration with wireless capability | Match the full order code and certification requirements |
| Emerson TREXLFPKLWS3 | AMS Trex Device Communicator | Related order-code configuration | Compare the complete ordering code and included configuration |
| Emerson TREXLFPKLWP3S | AMS Trex Device Communicator | Related configuration with a different support-code arrangement | Verify the exact ordering code and supplied options |
| Emerson AMS Trex Device Communicator | Handheld Field Communicator | Product family covering different communication and power configurations | Select according to protocol, module, battery and certification requirements |
| Emerson AMS Device Manager | Instrument Asset Management Software | Related software for supported device configuration management | Check compatibility with the plant’s installed software and synchronization setup |
| Emerson Device Communicator Plus Module | Field Communication Module | Module category associated with HART and loop-related functions | Verify compatibility with the communicator and required field tasks |
Key Advantages
- Supports HART and FOUNDATION Fieldbus instrument maintenance in one handheld device.
- Provides access to supported configuration and diagnostic functions at the field instrument.
- Supports selected HART loop-power and current-measurement tasks.
- Uses a rechargeable power module for portable operation.
- Supports configuration-management workflows with compatible AMS software.
Technical FAQs
When should the TREXLFPKLWS3S be selected instead of a HART-only communicator?
Choose this configuration when maintenance work involves both HART and FOUNDATION Fieldbus instruments and the required Device Communicator Plus functions. The protocol requirements, communication module, battery configuration and certification must all match the intended work.
Can the AMS Trex power a HART transmitter during commissioning?
The Device Communicator Plus configuration supports loop power for compatible HART devices in a suitable setup. Before using this function, verify the instrument requirements and follow the communicator’s specified connection procedure.
What should be checked when the communicator cannot establish communication with an instrument?
First confirm the protocol, terminal selection, wiring and electrical conditions. For HART instruments, inspect the loop arrangement and communication connections; for FOUNDATION Fieldbus devices, check the segment connection and applicable fieldbus conditions.
Does the TREXLFPKLWS3S replace the plant’s PLC or DCS?
No. The AMS Trex is a portable instrument configuration and diagnostic tool. The PLC or DCS continues to perform its control, interlocking and process-management functions, while the communicator helps technicians work directly with supported field instruments.