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Cost-Efficient and Advanced HART and FF Communicators

Ethernet-APL Home

Ethernet-APL is an extension of standard (and familiar) Ethernet specifically defined for process communication applications.  It is a physical layer standard that consists of two wires that provide communications and power to process instruments. The specification defines features to make communications more reliable and safe for hazardous areas.  Cable lengths up to 1km are possible.

Standard communication protocols such as HART-IP provide the interface to host applications.

We offer HART to APL development boards for device manufacturers interested in adding APL capabilities to their instruments.  We also have an Ethernet-APL switch for connecting the APL network to an Ethernet network.  A HART-APL adapter prototype, for use in the field with existing HART transmitters, will debut at ACHEMA 2024.

The DevCom HART Communicator Apps all fully support HART-IP.  This means they can be used to configure process instruments using Ethernet-APL.  No need to purchase additional software to configure or read data from Ethernet-APL devices.



The PCB converts existing HART transmitters to the new Ethernet Advanced Physical Layer (APL) interface.  The PCB offers an easy migration path for existing HART Transmitters.  We can create a turnkey solution or be your development partner to modify the PCB to incorporate custom features or size requirements.  

Features and Benefits:                    

  • Easily convert existing HART Transmitters to APL
  • Can also quickly design “direct to APL” transmitters without HART
  • Works with SLAA Class APL devices
  • APL connection supplies power so no external power supply needed
  • HART-IP protocol support included
  • Small Form factor, 2.5” x 2.5” (63mm x 63mm)
  • Low power consumption for integration into Hazardous Area designs
  • External Analog I/O for connections to external sensors or other peripherals
  • I2C and SPI flash available for device logs, DD file, FDI package, and other additional data
  • Secure firmware updates for easy development updates
  • Complete documentation and support
  • Reduced time to market
  • Lower development cost
  • Concentrate on your instrument features, not APL!

Webpage: HM-APL-PCB



Ethernet-APL Switch, 3 Channels


The APL-SW-3 Ethernet Advanced Physical Layer (APL) Switch is used to connect an APL device network to Ethernet.  The switch has 3 APL channels and one RJ45 Ethernet connector.  The switch supplies power to the APL network devices.  Supports HART-IP over APL.  This switch is used for APL device development.

Features and Benefits:                    

  • SLAA Class APL device
  • Connect up to 3 APL devices to Ethernet
  • Rugged ABS plastic enclosure
  • Works with DevCom2000, DevCom.iOS, and DevComDroid
  • 1 Year warranty
  • HART-IP Support
  • 3 Channels
  • RJ45 connection to Ethernet
  • 24 Vdc input power
  • DIN Rail mounting

Webpage: APL-SW-3



The adapter converts existing HART transmitters to the new Ethernet Advanced Physical Layer (APL) interface.  The adapter is field mountable to installed HART transmitters.  The adapter provides an easy upgrade path to support Namur Open Architecture (NOA) applications without disturbing control functions of the HART transmitter.

Features and Benefits:                    

  • Easily convert existing HART Transmitters to APL
  • Safe for hazardous areas
  • Easy mounting to HART transmitter
  • Powered by APL connection


Visit us at ACHEMA 2024 to see the prototype
Hall 11, Stand C14 (as part of the Fieldcomm Group booth)

Webpage: tbd

HART-IP Protocol Logo

DevCom Apps with HART-IP

Each operating system version of the DevCom HART Communicator App supports HART-IP.  This includes DevCom2000 for Windows, DevComDroid for Android, and DevCom.iOS for Apple (iOS and MacOS).  Simply set the IP address of the gateway of interest and Poll the Network.  Tap the desired transmitter to configure and the DD (Device Descriptor) based UI is exactly the same as if connected directly to the transmitter with a HART modem.

DevCom2000 includes additional online features that include reading measurement parameters, obtaining device status, creating alert criteria, etc.  NE-107 based device health indications are also included.  These online features require an additional license.

Webpage: DevCom2000
Webpage: DevComDroid
Webpage: DevCom.iOS



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