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Emerson / Rosemount AMS Trex Hart Calibrators

SKU: 2C55

Emerson AMS Trex Device Communicator

The AMS Trex Device Communicator expands the long line of Emerson handheld devices while adding new capabilities that adapt it to consumer expectations for mobile device functionality.

Technicians armed with a Trex communicator won’t waste time bringing devices back to the shop for analysis or reconfiguration. Problems with Foundation Fieldbus and HART devices can be diagnosed in the field while the devices are still installed. Simple issues can be addressed on the spot, avoiding unnecessary, and potentially destructive, invasive physical investigation of the problem.

Technicians need powerful and portable diagnostic tools so they can identify and troubleshoot device issues to minimize process upsets. With a Trex communicator in hand, you can properly diagnose device issues in the field. With the right handheld, maintenance teams will experience significant savings in work hours and peace of mind knowing that problems will be fixed quickly and properly the first time.

Once changes are made in the field, AMS Trex will automatically synchronize the information with the AMS Device Manager database via Wi-Fi or USB connection.

Rugged and Reliable

For a communicator to be useful in the field, it must be built to last and ready for anything. The Trex communicator is designed to withstand the harsh conditions in and around manufacturing facilities. The rugged device is easy to hold, yet designed to take the bumps and drops that come from normal use in the plant. In addition, the Trex communicator is protected against moisture and extreme temperatures, allowing you to work regardless of environmental conditions. The sturdy exterior is designed in accordance with Intrinsic Safety standards to limit the buildup of static electrical energy. Unlike consumer-grade mobile devices, the Trex communicator will withstand the abuse of a harsh field environment.

Designed based on user feedback and with field use in mind, the carrying case features an access window that allows you to use the communicator and contains pockets large enough to carry the charger, extra lead sets, or other tools you may need in the field.

Adjustable Display

The Trex communicator features a 5.7” resistive touchscreen display for easy use with bulky work gloves. The adjustable backlit screen can be easily changed to save power or adapt to dark environments or bright sunlight, ensuring a crisp display that can always be read – no matter the external conditions.

Emerson / Rosemount AMS Trex

An App for That

The Trex communicator includes Upgrade Studio, a PC application to help keep the Trex unit up-to-date with new software and apps.

With Upgrade Studio, add critical diagnostic tools to your toolkit and push them out to any number of Trex communicators. With multiple apps available and many more in development, Upgrade Studio will make the Trex communicator your go-anywhere, do-anything device:

Field Communicator – The Field Communicator app delivers a wide range of options for configuring and troubleshooting HART and Foundation Fieldbus devices.

Loop Diagnostics – With the Loop Diagnostic app, you can power the loop in the field and also perform loop troubleshooting and checkouts. The app helps with loop characteristic validation and lets you isolate and troubleshoot wiring issues.

Fieldbus Diagnostics – The Fieldbus Diagnostics app gives you the necessary toolset for troubleshooting and validating Foundation Fieldbus segments.

WirelessHART Provisioning – The WirelessHART Provisioning app allows you to provision wireless networks in less time, with less chance of error and in a more secure fashion. The app can configure hundreds of devices with a push of a button, improving accuracy and allowing you to provision an entire network up to 6x faster.

Radar Master – The Radar Master app enables you to ensure the measurement and configuration accuracy of your Rosemount radar level transmitters by bringing the power of Radar Master software to the field. Use dynamic graphics to verify configurations while protecting the safety of your personnel and assets.

Valvelink Mobile – With Valvelink Mobile, you can analyze and review valve assembly condition and performance without affecting the process. Configuration and troubleshooting of digital valve controllers has never been more efficient.

Calculator – The Calculator app for AMS Trex includes a simple calculator, conversion calculator for base conversions, loop convertor/Ohm’s law calculator, and unit converter for engineering units.

Trex Help – The Trex Help app offers a searchable help guide, putting key information on operation and troubleshooting at your fingertips.

Designed for Use

Designed for comfortable, one-handed, all-day operation in the field, the Trex communicator is packaged in an evenlybalanced form factor with a rugged hand strap so you can easily hold it, even when working in tight spaces. It comes standard with 32 GB of application memory, providing plenty of space to customize it with the apps of your choice. With built-in USB and Wi-Fi connectivity, you can move data to and from the communicator using the connectivity option that is most convenient. With numerous communication options, your communicator has never been more connected.

The communicator’s robust lithium-ion power module will keep it running for hours, well over a full shift, even when it is being used to power other devices in the field.

Intrinsically Safe

The Trex communicator is built to go wherever you may need to be. Unlike consumer mobile devices that cannot be taken into hazardous areas without shutting down the process or pulling a hot work permit, the Trex unit meets global Intrinsic Safety requirements:

  • ATEX
  • CSA (US/Canada)
  • IECEx

Gain freedom and flexibility with a communicator that can go anywhere you need to, when you need to, without worrying if the device will put you at risk.

Power the Loop

The Trex communicator includes built-in functionality to power a device. Simply connect the communicator to an instrument to power it. Technicians no longer waste time rounding up a power supply or confirming adequate loop resistance before testing, speeding configuration on the bench.

Power the loop functionality allows device configuration in the field on new projects—even before power and I/O infrastructure are in place. Transmitter configuration no longer needs to be the last step of new projects. Configure transmitters before the host system, wiring, piping, and other project elements arrive, keeping transmitter configuration from being a critical path item, allowing more flexibility in new project scheduling and leading to faster startups.

Powering devices from the communicator allows you to isolate the device from the rest of the system, helping you identify installation problems like power supply, wiring, I/O card, and configuration issues.

Auto Sync

The Auto Sync technology in AMS Trex helps maintain data integrity in your AMS Device Manager database without any technician intervention. Every change made in the field is automatically recorded and time-stamped.

Changes are updated in real-time if Wi-Fi connection is enabled and a technician is in a hot spot. Or changes are cached on the Trex communicator and applied to the database when the communicator detects a Wi-Fi signal or USB cable connection.

The Trex communicator logs and timestamps changes as they occur, delivering an accurate audit trail of device changes to the AMS Device Manager database.

AMS Trex

Powerful Diagnostics

Identify Valve Problems

Valve problems are particularly costly to diagnose and repair. Field technicians are often required to pull a valve to investigate a problem, and removing valves for inspection usually means shutting down the process. Further complicating troubleshooting, technicians often need to disassemble the valve to determine the root cause of the problem. This frequently leads to further damage to the valve, ending in a more time consuming and expensive repair.

Using the ValveLink Mobile app on the Trex unit, you can perform valve diagnostics in the field, including valve signature, dynamic error band, PD one button sweep, and step response, without having to pull the valve or perform invasive troubleshooting steps. ValveLink Mobile works with HART and Foundation Fieldbus Fisher® FIELDVUE™ digital valve controllers and provides an intuitive user interface that is easy to understand and use. The large touchscreen on the Trex communicator makes it easier than ever to see all valve diagnostic details.

Diagnose Communication Problems

The Trex communicator can configure and troubleshoot Foundation Fieldbus devices and segments in your plant. Use the communicator to create a quality segment by diagnosing the network DC voltage and average noise. Detect power supply problems using the communicator’s power the loop functionality or by monitoring low frequency noise on a segment.

Digitize Visual Inspections

AMS Inspection Rounds on AMS Trex digitizes information collected during inspection routes to drive operations and maintenance action. By delivering information to automation systems, personnel have accurate, real-time information that enables them to make better decisions. Graphical dashboards deliver insight into plant condition, helping prioritize action and highlighting critical safety issues.


Processor, Memory, and Operating System
Microprocessor 800 MHz ARM Cortex A8 / NXP
Memory Internal Flash 2 GB NAND and 32 GB extended flash
Operating System Windows Embedded Compact 2013
Weight Approximately 2.9 lbs (1330 grams)
Display 5.7 inch (14.5 cm) color VGA resistive touchscreen
640 x 480 pixel
Keypad X button – similar to a Back key
4 arrow buttons to navigate menus
Checkmark- similar to an Enter key
AC Adapter
Battery Rechargeable Lithium- Ion Power Module
Operating Time 8+ hours of typical use
Charge Time 3 to 4 hours
LEDs 6 LEDs. Five LEDs for indicating the progress of charging. One LED to indicate the AC adapter is charging the power module.
Battery Charger Options Input voltage 100-240 VAC, 50-60 Hz
Cables included with US, EU, UK, and AU plugs
USB Micro USB Connector. USB 2.0
Remove the USB cable from the Trex unit before connecting to a device.
Battery Charger Barrel Round Plug Tip
Wireless Approvals FCC, CE, RED and IC Approvals
Certified for use in over 100 countries
Bluetooth 2.1
Range up to 10 m
Wi-Fi 802.11 b/g/n
Range up to 33 m
NFC Active NFC
Range up to 20 mm
Communication Modules
Device Communicator Communication Module
HART terminal Enables HART device communication
Connectors: Two Banana Jack Plugs
Optional Internal Resistor: 250 or 500 Ohm
Fieldbus (FF) terminal Enables Foundation Fieldbus device communication
Connectors: Two Banana Jack Plugs
Device Communicator Plus Communication Module
HART terminal Enables HART device communication
Connectors: Two Banana Jack Plugs
Optional Internal Resistor: 250 or 500 Ohm
HART + pwr terminal Enables HART communication with the Trex unit, and provides power to one HART device in a bench setup.
Connectors: Two Banana Jack Plugs
Includes HART power supply, resistors (167 Ohm), current control, and ammeter.
Current Range: 3 -22.5 mA
mA terminal (external ammeter) Measures current on a 4-20 mA current loop.
Connectors: Two Banana Jack Plugs
Current Range: Up to 22.5 mA
Resolution: 0.1 mA
Fieldbus (FF) terminal Enables Foundation Fieldbus device communication
Connectors: Two Banana Jack Plugs
FF + FF pwr terminal Provides power to one Foundation Fieldbus device in a bench setup.
Connector: One Banana Jack Plug ( Power conditioner included)
Current Range: 0- 38 mA
Usage -20°C to +55°C (-4°F to 131°F).
For IS approval: -20°C to +50°C (-4°F to 122°F)
Charge +10°C to +45°C (50°F to 113°F)
Stoarge with power module -20°C to +50°C (-4°F to 122°F) (less than 1 month)
Storage without power module -20°C to +60°C (-4 °F to 140°F)
Enclosure Rating IP54
Shock The unit shall survive a 1-meter, all sides and corners drop test onto concrete.

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Emerson / Rosemount AMS Trex Spec Sheet