COVER STORY
be communicated via Ethernet packets (with higher bandwidth) through the fi eld switch network to the PLC/DCS controller and ultimately to the cloud. There are several distinct advantages that will help drive the transition from legacy fi eldbus to Industrial Ethernet. Firstly, the potential to reuse the existing cabling infrastructure (up to 1km in length) simplifi es deployment and reduces retrofi tting costs. Secondly, the amount of available power being delivered over the cable to the instrument itself, which was previously confi ned to 36mW (best case, with 4-20mA deployments), is now up to 60W (cable dependent) or 500mW in Zone 0, intrinsically safe applications. The extra available power will now enable higher functionality instruments with end- node intelligence. This, married with the 10Mbit uplink speed now available, will provide the anticipated increased insights to capitalise on the effi ciencies promised by Industry 4.0.
Security
Ethernet has vulnerabilities, and security is one of the most critical concerns impacting the adoption rate of Industry 4.0. By creating an open fl ow of information throughout the enterprise between OT and IT and from the edge to the cloud, the potential impact of a security breach can be devastating.
Security should be a fundamental risk management consideration in planning your Industry 4.0 strategy. Building security into today’s increasingly complex
10 October 2020 | Automation
networks is far from easy; it requires a multilayer approach to make it inherent throughout the system - within edge devices, controllers, gateways, and further up the stack.
What’s available today? The ADI Chronous portfolio of scaleable Ethernet solutions includes physical layer devices (PHYs), embedded switches and complete platform solutions with multiprotocol software. The Chronous portfolio off ers security at each node point within the system, while minimising trade- off s in power, performance and latency. To support the transition and provide a network bridge to legacy fi eld devices, ADI has developed a new technology called software confi gurable I/O (AD74413R). This will enable the development of fi eld- confi gurable remote I/O units that bridge the gap between legacy instruments and the higher-level Ethernet network.
The roadmap to deployment We all agree on the advantages brought by a converged network based on Industrial Ethernet. These include a simplifi ed network architecture, cost reduction through the removal of gateways, the elimination of hardwired connections, improved system optimisation, increased up-time, etc. The advent of new standards and their imminent ratifi cation is the catalyst needed to accelerate this awaited transition. This is a transition fi rmly driven by the need for higher-performance connectivity networks with increased
Figure 5: Seamless connectivity from the edge to the cloud
integration between OT and IT systems. TSN is the vehicle to deliver a converged network and, when married with 10BASE- T1L, will realise seamless edge-to-cloud connectivity. The migration will not happen overnight, but the potential benefi ts are so compelling that it is likely adoption will outpace standard industrial norms. At the heart of the Industry 4.0 vision is the ability to automate processes using connected devices with the capacity to collect, send and receive information. ADI Chronous is unlocking the data and insights previously unobtainable from many edge-node devices, thereby awakening new realms of possibilities for data analysis and operation insight. Industrial Ethernet connectivity will awaken this reality through the seamless transfer of current and future data streams across the automation network to the cloud. There are data islands of information and insight we cannot access today, but as Industrial Ethernet deployment becomes the norm, the challenge for Industry 4.0 will move to security and what to do with all this data to maximise our business value. Analog Devices has the deep domain expertise, technology and solutions needed to accelerate this transition to the smart factory of tomorrow.
CONTACT:
Analog Devices
www.analog.com
automationmagazine.co.uk
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