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What is Ethernet-APL? Your solution to an intelligent plant


Connect the field and unleash the potential with Ethernet-APL

The advanced physical layer for Ethernet, Ethernet-APL, meets the requirements of process plants and brings Ethernet with all its advantages to the field. With Ethernet-APL, digitalization in process plants is fully enabled and benefits are achieved across all life cycle phases.


  • For engineers:
    - Designed for process and hybrid industries
    - State-of-the-art technology supporting digitalization concepts

    - Flexible and scalable network topology design
    - No need for hazardous area calculations (2-WISE)
    - High availability by a variety of redundancy mechanisms

  • For operators and maintenance personnel:
    - Increased performance by accurate digital process values, high-speed data transfer and simple remote device access

    - Optimized reliability by continuous diagnostics, monitoring and remote verification
    - Seamless data access by homogeneous network for the 2nd channel and the IIoT
    - Start-up records for automatic configuration at device exchange

Why Ethernet-APL?

Ethernet-APL Logo

With Ethernet-APL it is possible to realize different topologies – depending on the requirements of the process plant. In general, it can be distinguished between star topologies as well as trunk and spur topologies.

Possibilites with Ethernet-APL

Independent of the topology, the upper layer integration is the same – via standard Ethernet mechanisms.

  • Integration to process control system via the industrial Ethernet protocol functionalities (e.g. via GSD for PROFINET)

  • Integration to an asset management tool (e.g. FieldCare) via device driver (FDI Package)

  • Web server of the devices can be accessed via the standard Ethernet protocol http

  • For the IIoT, the data can be transferred easily via edge devices to upper layer applications where digital services can provide the added value based on the valuable data from the field level

Ethernet-APL applications

Ethernet-APL can be used everywhere, where 4 to 20 mA and fieldbus technologies are used today. The field devices and infrastructure products fit perfectly for heavy industries – mainly for greenfield projects but with some modifications also in brownfield.

Ethernet-APL fits to many applications across different industries where some of the following use cases are relevant:

  • Explosion hazardous areas

  • Asset management for many measuring points

  • Efforts for calibration of analog communication loops

  • Monitoring and optimization, e.g. by using the 2nd channel

  • Easy access to device diagnostics

  • Additional process quality information

Our free of charge trainings

Sign up for a Tech Booster training for exploring more details about Ethernet-APL for free!
Go to our Ethernet-APL Tech Booster

What is Ethernet-APL? The perfect foundation for IIoT services

Ethernet-APL as enabler for digital services in parallel to process control

Ethernet-APL ROI evolution ©Endress+Hauser

Cost comparison of analog and digital technologies

Ethernet-APL topology comparison ©Endress+Hauser

Ethernet-APL topology comparison

This video explains Ethernet-APL in a few minutes.

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    • White paper (WP)
    Ethernet-APL competence brochure

    Ethernet-APL: Smart, fast, digital

    • White paper (WP)

    Ethernet-APL is designed to be open, future-proof and ready for the Industrial Internet of Things (IIoT).

    Ethernet-APL brochure

    Ethernet-APL is bringing intelligence to process automation. It provides you with a fast data network. So you can benefit from IIoT, increase plant availability and optimize your processes.

    Ethernet-APL Engineering Guideline

    This document supports users during planning, installation and commissioning of Ethernet-APL devices and networks.