单对以太网(简称 SPE)是工业通信技术的热门话题。通常,重点是组件。但它的意义远不止于此——它实际上是未来基于以太网的通信结构。Phoenix Contact 的 SPE 连接器提供了这一点。
目前有很多关于组件、电缆和连接器的讨论,但是哪些 PHY(物理层)可用?可以使用哪些电缆?范围有多远,可以传输什么样的数据?后但并非不重要的一点是,连接器中是否已经出现了标准?所有这些问题背后的驱动力是工业通信的根本范式转变——对于整个基础设施,包括用于众多应用场景的设备和传感器。
什么已经可用?
BroadR-Reach 技术——一种用于汽车行业连接应用的以太网物理层标准——可以被认为是 SPE 发展的起点。现代中档汽车有超过 100 个传感器——这种趋势正在增加。控制设备、传感器、执行器和通信设备的数量从一代到下一代不断增长——电缆的数量也是如此。汽车需要具有统一通信标准的创新传感器技术。
为 CAN 总线寻找继任者,汽车行业因此确定了基于 TCP/IP 的传输方法并推动了个 SPE 标准。通过 IEEE 802.3 工作组,个 SPE 标准作为 100BASE-T1 和 1000BASE-T1 在相关工作组中发布。Rosenberger Hochfrequenztechnik GmbH & Co. KG 已经在批量生产用于这些应用的连接器。
随着 IEEE 802.3 的 cg 标准终在 2019 年被采用,现在定义了更长距离的标准,这将引起许多工业应用的兴趣。这为 SPE 进入工厂和楼宇自动化等新应用领域扫清了道路。为了为此目的创建代设备,需要相应的单个组件,例如芯片、电缆和连接器。

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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.