{"id":129703,"date":"2025-04-09T15:40:32","date_gmt":"2025-04-09T20:40:32","guid":{"rendered":"https:\/\/www.controleng.com\/?p=129703"},"modified":"2025-06-15T18:31:45","modified_gmt":"2025-06-15T23:31:45","slug":"single-pair-ethernet-breaks-down-the-limits-of-connectivity","status":"publish","type":"post","link":"https:\/\/www.controleng.com\/single-pair-ethernet-breaks-down-the-limits-of-connectivity\/","title":{"rendered":"Single-pair Ethernet breaks down the limits of connectivity"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Single-Pair Ethernet Insights<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Miniaturized connectors, compared to traditional 4-wire Ethernet allow for smaller devices, in addition to space saved by also providing power.<\/li>\n\n\n\n<li>Smaller connectors are accompanied by thinner cables that have a tighter bending radius. Separate cabling for power is no longer required.<\/li>\n\n\n\n<li>Devices connected via SPE can accept voltages (12V, 24V, 48V) yielding power classes up to 50 W.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<\/div>\n<\/div>\n\n\n\n<p>Single-pair Ethernet found its way into the automation and control markets via Ethernet-Advanced Physical Layer (APL), the intrinsically safe version of SPE. A need in the process control industries to adapt SPE for hazardous environments was met with an effort known as 2-Wire Intrinsically Safe Ethernet (2-WISE).<\/p>\n\n\n\n<p>The same companies that created Ethernet-APL want to ensure SPE will function equally well without intrinsic safety. It is projected these harmonization activities will commence in 2025 to standardize its power classes. This will ensure SPE products from all vendors can connect seamlessly.<\/p>\n\n\n\n<p>In November 2024, PROFIBUS &amp; PROFINET International (PI) announced a harmonized mating face for SPE connectors. PI Working Groups put forth a concept based on the hybrid IEC 63171-7 plug variant \u2013\u2013 but adapted for IP20 and IP65 (M8 and M12) environments. Until then, no single connector had been agreed upon.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"640\" src=\"https:\/\/www.controleng.com\/wp-content\/uploads\/2025\/04\/CTL2504_WEB_SPE_ETHERNET_PROFINET_FIGURE1-1024x640.png\" alt=\"Single-pair Ethernet (SPE) technology and benefits. Courtesy: PI North America\" class=\"wp-image-129704\" srcset=\"https:\/\/www.controleng.com\/wp-content\/uploads\/2025\/04\/CTL2504_WEB_SPE_ETHERNET_PROFINET_FIGURE1-1024x640.png 1024w, https:\/\/www.controleng.com\/wp-content\/uploads\/2025\/04\/CTL2504_WEB_SPE_ETHERNET_PROFINET_FIGURE1-300x188.png 300w, https:\/\/www.controleng.com\/wp-content\/uploads\/2025\/04\/CTL2504_WEB_SPE_ETHERNET_PROFINET_FIGURE1-768x480.png 768w, https:\/\/www.controleng.com\/wp-content\/uploads\/2025\/04\/CTL2504_WEB_SPE_ETHERNET_PROFINET_FIGURE1-1536x960.png 1536w, https:\/\/www.controleng.com\/wp-content\/uploads\/2025\/04\/CTL2504_WEB_SPE_ETHERNET_PROFINET_FIGURE1-2048x1280.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Single-pair Ethernet (SPE) technology and benefits. Courtesy: PI North America<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Figuring out the future of SPE Ethernet<\/h2>\n\n\n\n<p>The Ethernet-APL Group decided 10 Mbit\/s SPE (10BASE-T1L), due to its long-distance capabilities, was best suited for process control plants. Such speeds are hundreds, or in some cases, thousands of times faster than current technologies. Even outside the process control industry, 10 Mbit\/s satisfies many use-cases. However, SPE can be utilized at 100 Mbit\/s (100BASE-T1L) with cable runs of potentially up to 500 meters, or at 1 Gbit\/s for up to 40 meters. Therefore, work has begun to prepare PROFINET for these standards, when they emerge.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How SPE Ethernet increases transparency<\/h2>\n\n\n\n<p>Single-pair Ethernet allows for even the smallest devices at the field level to utilize the same protocols as those at higher levels. Transparency and data throughput are greatly increased, making the realization of IIoT\/Industry 4.0 use-cases easier than ever before.<\/p>\n\n\n\n<p><strong>Michael Bowne<\/strong> is executive director, <a href=\"https:\/\/us.profinet.com\">PI North America<\/a>, the organization for Profinet, Profibus and other networking technologies. Edited by <strong>Sheri Kasprzak<\/strong>, managing editor, Automation &amp; Controls, WTWH Media, <a href=\"mailto:skasprzak@wtwhmedia.com\">skasprzak@wtwhmedia.com<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Single-Pair Ethernet Insights Single-pair Ethernet found its way into the automation and control markets via Ethernet-Advanced Physical Layer (APL), the intrinsically safe version of SPE. A need in the process control industries to adapt SPE for hazardous environments was met with an effort known as 2-Wire Intrinsically Safe Ethernet (2-WISE). The same companies that created [&hellip;]<\/p>\n","protected":false},"author":161,"featured_media":129704,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[104065],"tags":[110038,109341,109340,109385,109886,109868,110039,109887],"tracking-metrics":[],"display-location":[109353],"class_list":{"2":"type-post"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Single-pair Ethernet breaks down the limits of connectivity - Control Engineering<\/title>\n<meta name=\"description\" content=\"Single-pair Ethernet (SPE) is a networking technology designed to provide Ethernet connectivity over a single set of twisted-pair copper wires.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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