Emerson TREXLFPKLWS3S AMS Trex Communicator for Advanced Field Device Configuration and Diagnostics
The Emerson TREXLFPKLWS3S is an AMS Trex Device Communicator configured for technicians who commission, configure, diagnose, and maintain intelligent field instruments. This exact ordering code combines HART and FOUNDATION Fieldbus applications with the Device Communicator Plus module, a rechargeable power module, intrinsically safe approvals, wireless capability, three-year standard support, and a carrying case.
For process plants, maintenance workshops, system integrators, and commissioning teams, the TREXLFPKLWS3S provides a portable platform for field device communication and troubleshooting. Keeping the complete model code in the quotation is important because AMS Trex suffixes define different communication modules, applications, approvals, radio options, support periods, and accessories.

TREXLFPKLWS3S Configuration Code
| Code | Configuration |
|---|---|
| TREX | Base AMS Trex platform |
| L | Device Communicator Plus communication module |
| F | HART and FOUNDATION Fieldbus applications |
| P | Rechargeable lithium-ion power module |
| KL | ATEX, CSA US/Canada, and IECEx intrinsically safe certification, including FISCO as applicable |
| W | Wireless radio option |
| S3 | Three-year standard support with technical support and software updates |
| S | Carrying case |
Key Features
Communication with HART and FOUNDATION Fieldbus devices
Device Communicator Plus module for expanded loop and field work
Rechargeable lithium-ion power module for portable operation
Intrinsically safe KL approval configuration for suitable certified hazardous areas
Wireless option for supported AMS Trex connectivity functions
Rugged IP54 enclosure and one-meter drop-test design
Three-year standard support and carrying case included in the ordering code
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Emerson |
| Model | TREXLFPKLWS3S |
| Product Type | AMS Trex handheld device communicator |
| Supported Applications | HART and FOUNDATION Fieldbus |
| Display | 5.7 in color VGA resistive touchscreen |
| Battery Operating Time | 8+ hours of typical use |
| Operating Temperature | -20 to 55°C (-4 to 122°F) |
| Enclosure Rating | IP54 |
| Weight | Approximately 2.9 lb (1330 g) |
| Shock Resistance | Tested for a one-meter drop onto concrete |
| Support | Three-year standard support |
Industrial Applications
The TREXLFPKLWS3S is suited to plant commissioning, transmitter setup, control valve diagnostics, loop checks, shutdown maintenance, instrument workshop service, and troubleshooting of compatible HART or FOUNDATION Fieldbus devices. The portable design helps technicians work close to installed instruments while viewing device status, configuration information, and diagnostic data.
Ordering and Compatibility Notes
Before ordering, confirm the complete model TREXLFPKLWS3S, required communication protocols, hazardous-area approval, wireless availability in the destination country, charger and power requirements, lead set, carrying case, software support period, quantity, and delivery destination. Similar AMS Trex model codes should be quoted as separate items unless an alternative is formally approved.
Frequently Asked Questions
Does TREXLFPKLWS3S support both HART and FOUNDATION Fieldbus?
Yes. The F application code specifies HART and FOUNDATION Fieldbus applications.
What does S3 mean in this model?
S3 specifies three-year standard support, including technical support and software updates under Emerson's applicable support terms.
Is a carrying case included?
Yes. The final S option identifies the carrying case in the published ordering configuration.
