Multi-Vendor Ethernet-APL Test Proves the Technology’s Market Readiness

March 31, 2023
Ethernet-APL load tests conducted as part of Endress+Hauser’s Open Integration partner program proved that Ethernet-APL can be used in real world scenarios using components from various manufacturers.

There’s been a lot of buzz across the process industries about Ethernet Advanced Physical Layer (APL) based in its promise to bring Ethernet to field-level devices. The ability to bring Ethernet directly to such devices means that Industry 4.0 levels of connectivity can be achieved without the need for network gateways.

The 2-wire Ethernet-APL technology—which delivers power and communication over the same wire pair—meets the requirements of harsh process environments. This means that digital data transmission with high bandwidth is now possible over long distances, even in explosive atmospheres.

Endress+Hauser reports that it has successfully conducted two load tests of a realistic Ethernet-APL setup with components from various manufacturers. The load tests were designed according to customer specifications to prove that components from different manufacturers can be combined to create a reliable and robust system based on Ethernet-APL.

BASF defined the requirements for this test from an industrial end user point of view. On the hardware suppliers’ side, Endress+Hauser products were tested alongside products from Pepperl+Fuchs, Honeywell and ABB. Their components were confirmed to work together in harmony, according to Endress+Hauser

Read more about Ethernet-APL. Proving market readiness

The first test was set up with nearly 240 Endress+Hauser measuring devices, including flow, pressure, temperature and level sensors. They were integrated into a system with Pepperl+Fuchs’ field switches and a Honeywell control system, all using Ethernet-APL and Profinet. For the second test, ABB provided the control system and was tested along with the previous field switches and measuring devices.

The test results showed that Ethernet-APL can be used in real world scenarios. All relevant requirements like total net load or redundancy switch-over times were met or exceeded.

Given the success of the load test, the participating companies indicate that they have taken a significant step towards a technological infrastructure that is open, future-proof and ready for the Industrial Internet of Things. Endress+Hauser, which is planning the release of a portfolio of Ethernet-APL measuring devices that transmit data via the Profinet protocol, says Ethernet-APL will enable customers to create more flexible, efficient and cost-effective industrial systems and deliver more benefits for the industry.

See more information about Endress+Hauser’s Ethernet-APL plans at

Watch this video explaining Endress+Hauser's approach to Ethernet-APL.

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