Industry experts, such as PROCENTEC, show steady growth in RS-485-based fieldbus technology adoption (PROFIBUS®) and rapid growth for Industrial Ethernet (PROFINET). In 2018, there were 61 million PROFIBUS fieldbus nodes installed worldwide, with PROFIBUS process automation (PA) growing 7% year on year. The PROFINET install base is at 26 million nodes, with 5.1 million devices installed in 2018 alone.
With this steady growth in RS-485 fieldbus adoption and Industry 4.0 accelerating the deployment of smart connected factories, ensuring that fieldbus technologies are optimized helps to enable a smart system. Optimized fieldbus technologies must carefully balance EMC robustness and reliable data transmission.
For these demanding applications, a careful examination of RS-485 transceiver timing performance over cables is required to ensure a reliable system, as well as EMC characterization. This technical article from Analog Devices introduces some key system timing and communication cable concepts; provides key performance indicators, including clock and data distribution and cable driving capability; and demonstrates benefits for industrial applications using the next-generation ADM3065E/ADM3066E RS-485 transceivers which outperform industry standards with the ability to communicate further and faster compared to standard RS-485 devices.
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