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- Emerson
- TREXLHPKLWS1S
- AMS Trex Device Communicator
- USA
- 201 × 61.1 × 141 mm
- 1.33 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Emerson TREXLHPKLWS1S is an AMS Trex Device Communicator used by instrumentation and maintenance engineers to configure, commission, troubleshoot, and diagnose field devices directly at the installation site.
It is particularly useful when a technician needs access to a transmitter, valve positioner, or other intelligent field instrument without bringing the device back to a workshop. The communicator can connect to supported HART and FOUNDATION Fieldbus devices and provides a portable interface for viewing device information, changing configuration parameters, checking status, and investigating field problems.
A typical maintenance task might involve connecting the Trex communicator to a HART pressure transmitter after a process reading appears incorrect. The engineer can inspect the device configuration, review diagnostic information, verify the measurement range, and make an approved adjustment without connecting a laptop directly to the instrument.
The same approach is useful during commissioning. A technician can use the communicator to verify instrument identification, check configuration, perform device diagnostics, and confirm communication before the field device is returned to normal operation.
The TREXLHPKLWS1S is part of Emerson’s AMS Trex platform rather than a conventional PLC programming terminal. Its purpose is centered on field-device communication and maintenance, making it a tool that complements the control system rather than replacing a controller or I/O module.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Emerson |
| Model | TREXLHPKLWS1S |
| Product Family | AMS Trex |
| Product Type | AMS Trex Device Communicator |
| Primary Function | Field Device Configuration, Commissioning, Troubleshooting and Diagnostics |
| Supported Device Communication | HART / FOUNDATION Fieldbus |
| Display | 5.7-inch color touchscreen |
| Operating System | Android-based |
| Connectivity | HART and FOUNDATION Fieldbus |
| Wireless Connectivity | Wi-Fi / Bluetooth |
| Internal Battery | Rechargeable lithium-ion battery |
| Hazardous Area Use | Available for applicable certified environments |
| Application | Field Instrumentation Maintenance |
| Dimensions | 201 × 61.1 × 141 mm |
| Weight | 1.33 kg |
Product Features
- AMS Trex Device Communicator
- Model TREXLHPKLWS1S
- Supports HART field-device communication
- Supports FOUNDATION Fieldbus device communication
- Portable interface for field instrumentation
- Suitable for device configuration and commissioning
- Supports field troubleshooting and diagnostics
- Color touchscreen interface
- Android-based operating environment
- Integrated rechargeable battery
- Wireless connectivity for supported functions
- Suitable for transmitter and valve-device maintenance
- Useful for commissioning teams and instrumentation technicians
- Can be used without connecting a general-purpose laptop directly to the field device
Working Principle
The AMS Trex Device Communicator acts as a portable engineering interface between the technician and an intelligent field device.
Technician → TREXLHPKLWS1S → HART / FOUNDATION Fieldbus Device
When connected to a supported HART instrument, the Trex communicates with the device over the instrument’s communication loop. The technician can access device-specific parameters, status information, configuration data, and diagnostic functions through the communicator interface.
With FOUNDATION Fieldbus instruments, the communicator connects through the fieldbus network and interacts with the device according to the functions supported by that instrument.
For example, during transmitter commissioning, the engineer can identify the connected device, inspect its configured measurement range, check the engineering units, review device status, and perform approved configuration changes. During troubleshooting, the same connection can expose diagnostic information that may not be visible from the control-room operator screen.
This makes the Trex particularly useful when the problem is suspected to be inside the field instrument itself. A control system may show an abnormal process value, but the communicator allows the technician to inspect the instrument configuration and diagnostics at the device level.
Role in a Field Instrumentation Maintenance Architecture
The TREXLHPKLWS1S sits at the field maintenance and device-service layer rather than inside the permanent PLC or DCS control loop.
Field Device → HART / FOUNDATION Fieldbus → TREXLHPKLWS1S → Technician
| System Element | Function |
|---|---|
| TREXLHPKLWS1S | Provides portable access to supported intelligent field devices |
| HART Transmitter | Supplies process measurement and device information |
| FOUNDATION Fieldbus Device | Exchanges process and diagnostic information over the fieldbus |
| Control Valve Positioner | Provides configuration and diagnostic access through supported communication |
| PLC / DCS | Executes the permanent control application |
| HART / FOUNDATION Fieldbus Network | Carries device communication |
| Instrument Junction / Connection Point | Provides access to field wiring where applicable |
| Instrument Technician | Performs commissioning, configuration, diagnostics, and maintenance |
The communicator can therefore be used alongside a DCS or PLC without becoming part of the controller’s normal execution path. It gives maintenance personnel another access point for device-level investigation.
Industrial Applications
| Application | Typical Use |
|---|---|
| Process Instrumentation | Configuring and diagnosing intelligent transmitters |
| Oil and Gas | Field commissioning and troubleshooting of process instruments |
| Chemical Plants | Checking transmitter and valve-device configuration |
| Refining | Supporting maintenance of HART and FOUNDATION Fieldbus instruments |
| Power Generation | Field diagnostics for process measurement equipment |
| Water Treatment | Commissioning and troubleshooting smart field instruments |
| Pharmaceutical Manufacturing | Instrument setup and maintenance activities |
| Food and Beverage Plants | Device configuration and field verification |
| Industrial Utilities | Servicing intelligent measurement and control devices |
| Plant Commissioning | Verifying field-device configuration before startup |
Installation and Maintenance
- Confirm that the connected field device supports the communication protocol required for the maintenance task.
- Identify the instrument and its tag number before connecting the communicator.
- Verify the field connection point and follow the site’s approved instrument access procedure.
- Check the communicator battery condition before beginning an extended commissioning or troubleshooting task.
- Select the correct device communication mode for HART or FOUNDATION Fieldbus operation.
- Confirm that the connected device is recognized correctly before changing any configuration parameters.
- Record the original device configuration before making significant adjustments.
- Compare the device configuration with the approved instrument data sheet or commissioning documentation.
- Review active diagnostics and device status before assuming that a process-value problem is caused by hardware failure.
- After making an approved configuration change, verify the resulting measurement or device response.
- Restore the field device to its required operating condition and confirm communication with the control system.
- Record configuration changes, diagnostic findings, and maintenance results for future instrument servicing.
For hazardous-area work, the communicator and its accessories must be used according to the applicable certification and site safety requirements. Connection procedures should also follow the requirements for the specific field device and installation.
Related Components
| Component | Function |
|---|---|
| HART Field Transmitter | Provides intelligent process measurement and device communication |
| FOUNDATION Fieldbus Instrument | Provides fieldbus-based measurement and diagnostic data |
| Control Valve Positioner | Supports valve configuration and diagnostic functions |
| HART Communication Loop | Provides the physical communication path for HART devices |
| FOUNDATION Fieldbus Segment | Provides network communication for compatible field devices |
| Instrument Junction Box | Provides field wiring termination and access |
| 24 V DC Instrument Power Supply | Supplies power to applicable field devices |
| DCS / PLC | Processes field measurements and executes control logic |
| Device Configuration Database | Stores approved instrument configuration information |
| Instrument Test Equipment | Supports electrical and loop-level troubleshooting |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Emerson AMS Trex Device Communicator | Field Device Communicator | General HART and FOUNDATION Fieldbus maintenance |
| Emerson AMS Device Manager | Asset Management Software | Centralized device configuration and diagnostics |
| Emerson 475 Field Communicator | Handheld Communicator | HART and FOUNDATION Fieldbus field maintenance |
| Emerson AMS Device View | Device Management Software | Device monitoring and maintenance workflows |
| Emerson DeltaV | Distributed Control System | Process control and field-device integration |
| Emerson Fisher FIELDVUE | Digital Valve Controller | Intelligent control valve configuration and diagnostics |
The AMS Trex Device Communicator is most appropriate when technicians need a portable device for field-level commissioning and troubleshooting. Software-based asset-management tools are better suited to centralized device management from an engineering workstation.
Key Advantages
- Portable access to intelligent field devices.
- Supports both HART and FOUNDATION Fieldbus communication.
- Useful for commissioning and field troubleshooting.
- Allows technicians to inspect device configuration and diagnostics directly.
- Suitable for transmitter and valve-device maintenance.
- Reduces dependence on a laptop for routine field-device service.
- Supports device-level investigation alongside PLC and DCS systems.
- Useful across commissioning, maintenance, and troubleshooting activities.
Technical FAQs
Can the TREXLHPKLWS1S communicate with both HART and FOUNDATION Fieldbus devices?
Yes. The AMS Trex Device Communicator platform supports both HART and FOUNDATION Fieldbus communication, allowing technicians to work with different types of intelligent field instruments using one portable maintenance platform.
Can the TREXLHPKLWS1S be used to configure a pressure transmitter?
Yes, when the transmitter is a supported HART or FOUNDATION Fieldbus device. Depending on the instrument, the technician can access configuration parameters such as measurement range, engineering units, device status, and other manufacturer-supported settings.
Is the TREXLHPKLWS1S a replacement for a PLC or DCS?
No. The Trex is a field-device communicator, not a process controller. It is used by maintenance and commissioning personnel to communicate with intelligent instruments, while the PLC or DCS continues to execute the permanent automation and control functions.
What should be checked if the Trex cannot communicate with a field instrument?
First verify the communication protocol, physical connection, device power, wiring, and communicator mode. For HART devices, the current loop and connection arrangement should also be checked. For FOUNDATION Fieldbus devices, the segment configuration and device communication conditions should be reviewed before concluding that the field instrument or communicator has failed.