單對以太網(wǎng)(簡稱 SPE)是工業(yè)通信技術(shù)的熱門話題。通常,重點是組件。但它的意義遠不止于此——它實際上是未來基于以太網(wǎng)的通信結(jié)構(gòu)。Phoenix Contact 的 SPE 連接器提供了這一點。
目前有很多關(guān)于組件、電纜和連接器的討論,但是哪些 PHY(物理層)可用?可以使用哪些電纜?范圍有多遠,可以傳輸什么樣的數(shù)據(jù)?后但并非不重要的一點是,連接器中是否已經(jīng)出現(xiàn)了標準?所有這些問題背后的驅(qū)動力是工業(yè)通信的根本范式轉(zhuǎn)變——對于整個基礎(chǔ)設(shè)施,包括用于眾多應(yīng)用場景的設(shè)備和傳感器。
什么已經(jīng)可用?
BroadR-Reach 技術(shù)——一種用于汽車行業(yè)連接應(yīng)用的以太網(wǎng)物理層標準——可以被認為是 SPE 發(fā)展的起點。現(xiàn)代中檔汽車有超過 100 個傳感器——這種趨勢正在增加。控制設(shè)備、傳感器、執(zhí)行器和通信設(shè)備的數(shù)量從一代到下一代不斷增長——電纜的數(shù)量也是如此。汽車需要具有統(tǒng)一通信標準的創(chuàng)新傳感器技術(shù)。
為 CAN 總線尋找繼任者,汽車行業(yè)因此確定了基于 TCP/IP 的傳輸方法并推動了個 SPE 標準。通過 IEEE 802.3 工作組,個 SPE 標準作為 100BASE-T1 和 1000BASE-T1 在相關(guān)工作組中發(fā)布。Rosenberger Hochfrequenztechnik GmbH & Co. KG 已經(jīng)在批量生產(chǎn)用于這些應(yīng)用的連接器。
隨著 IEEE 802.3 的 cg 標準終在 2019 年被采用,現(xiàn)在定義了更長距離的標準,這將引起許多工業(yè)應(yīng)用的興趣。這為 SPE 進入工廠和樓宇自動化等新應(yīng)用領(lǐng)域掃清了道路。為了為此目的創(chuàng)建代設(shè)備,需要相應(yīng)的單個組件,例如芯片、電纜和連接器。

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Single Pair Ethernet – or SPE for short – is the trend topic when it comes to industrial communication technology. Usually, the focus is on components. But there is so much more to it than that – it is actually the Ethernet-based communication structure of the future. The SPE connectors from Phoenix Contact provide a glimpse of this.
There is currently a lot of discussion about components, cables, and connectors, but which PHYs (physical layers) are available? Which cables can be used? How far is the range and what sort of data can be transmitted? And last but not least, has a standard already emerged among connectors? The driving force behind all of these questions is a fundamental paradigm shift in industrial communication – for the entire infrastructure including devices and sensors for numerous application scenarios.
What is already available?
BroadR-Reach technology – an Ethernet physical layer standard for connectivity applications in the automotive industry – can be considered the starting point for the development of SPE. Modern mid-range vehicles have over 100 sensors – a trend that is on the increase. The number of control devices, sensors, actuators, and items of communication equipment keeps growing from one vehicle generation to the next – as does the amount of cabling. Innovative sensor technology with a uniform communication standard is required in the automobile.
Seeking a successor for the CAN bus, it was therefore the automotive industry that identified the TCP/IP-based transmission method and spurred on the first SPE standards. Through the IEEE 802.3 working group, the first SPE standards were published in the relevant task forces as 100BASE-T1 and 1000BASE-T1. Rosenberger Hochfrequenztechnik GmbH & Co. KG is already producing the connectors for these applications on a series scale.
With the cg standard from IEEE 802.3 finally being adopted in 2019, a standard for longer ranges has now been defined for the first time, which will be of interest for many industrial applications. This cleared the way for SPE to enter new fields of application such as factory and building automation. In order to create the first device generations for this purpose, corresponding individual components such as chips, cables, and connectors are required.