When we discuss Industry 4.0 or smart manufacturing, we all know that a fundamental prerequisite for realizing this vision is that data must play a central role. Insights and analyses built upon big data will become the cornerstone of the entire industrial system's operation. To achieve this goal, it is necessary to enable devices throughout the system to communicate and interconnect, forming an industrial internet, so that data can be transmitted and interacted efficiently and reliably.
Evolution of Industrial Ethernet Technology
The idea of connecting devices to form a network already existed in the Industry 3.0 era, marked by industrial automation technology. To this end, starting in the 1970s, various types of industrial fieldbuses were developed, hoping to connect previously isolated devices and achieve distributed control. However, although industrial fieldbuses have a wide range of applications, the lack of a unified standard has limited the scale of industrial networks, causing the technology to reach a bottleneck in its later stages.
To overcome this bottleneck, there is an urgent need to break down the barriers between different industrial fieldbuses and integrate the interconnection of industrial equipment into a unified network architecture, giving rise to "Industrial Ethernet." Simply put, Industrial Ethernet introduces the Ethernet architecture, widely used in the IT field, into the industrial sector. This achieves standardization at both the physical and data link layers for industrial networks using standard Ethernet media. Simultaneously, the advantages of Ethernet—higher transmission speeds, abundant development resources, and a robust ecosystem—can also benefit industrial networks.
This concept seems "perfect," but in reality, there's an unavoidable technical hurdle—standard Ethernet, by its very nature, is a "deterministic" network. It employs Carrier Sense Multiple Access/Collision Detection (CSMA/CD) and prioritizes data throughput over the "deterministic" requirements crucial for industrial networks, such as real-time performance, reliability, packet loss rate, and synchronization. To overcome this hurdle, standard Ethernet needs to be upgraded, adding specific protocols to ensure real-time performance and determinism, transforming it into a deterministic industrial Ethernet to meet the requirements of industrial applications. Since the beginning of the 21st century, this "transformation" of industrial Ethernet has continued, giving rise to excellent protocols like EtherCAT and PROFINET, significantly driving its development. Analysis shows that in recent years, the market share of industrial Ethernet has surpassed that of traditional fieldbus protocols.
With the advent of Industry 4.0, the evolution of Industrial Ethernet has taken another significant step forward. Within the IEEE 802.1 Ethernet standard framework, a complete TSN (Time-Sensitive Networking) protocol has been formed by defining a series of "sub-standards." This provides a universal processing mechanism for the Ethernet protocol's MAC layer, solving challenges in Ethernet transmission such as time synchronization, scheduling, traffic shaping, and communication path selection, reservation, and fault tolerance. This addresses the interoperability issues between networks using different protocols (such as sub-networks employing different Industrial Ethernet protocols) and allows for simultaneous support of real-time data required for field control and non-real-time, high-throughput data required for production management and enterprise operations within the same network architecture. It bridges the gap between the OT (Operations Technology) and IT (Information Technology) domains, truly enabling data to flow throughout the entire industrial production and operation process.
All these trends send a strong signal: the industrial Ethernet connectivity sector will maintain strong growth momentum in the future. This trend is beneficial to the entire Ethernet ecosystem, including industrial Ethernet connectors.
Features of Industrial Ethernet Connectors
Most people are familiar with the RJ45 connector used in Ethernet interfaces. However, just as Ethernet protocols used in industrial applications require special optimization, connectors in industrial Ethernet also need to be modified to adapt to the requirements of special industrial environments.
Compared to general-purpose products, industrial Ethernet connectors differ primarily in three aspects—
Environmental tolerance
Humid, dusty, corrosive gaseous and liquid environments, impact, vibration, electromagnetic interference... these are all complex and harsh environments that industrial sites may face. This requires industrial connectors to adopt special designs in terms of IP rating, resistance to mechanical shock and vibration, and electromagnetic shielding to ensure that they will not "drop out" under any environment.
Ease of use
To meet environmental tolerance requirements, industrial Ethernet connectors inevitably employ additional protection mechanisms. However, if these mechanisms are too complex and inconvenient to use, they can cause problems for field operators and potentially increase the risk of mismatches due to human error. Therefore, durability and ease of use are crucial requirements for industrial Ethernet connectors.
Miniaturization
Some might assume that larger industrial equipment wouldn't be so concerned about the size of interconnect components, but this isn't the case. Modern industrial equipment needs to interact with an increasing number of external resources—signals, power, data, and even air and water circuits—all requiring efficient arrangement within limited space, presenting a significant challenge. This necessitates Ethernet connectors to optimize their design and contribute to increased interconnect density. Therefore, miniaturization and even standardization have been key directions in the development of industrial Ethernet interconnect technology.
If the deployment of industrial Ethernet is a special task facing a special application environment, then the connectors that have entered this field are like "superheroes" who are different from "ordinary people" and have different superpowers. Their responsibility is to help users cope with the challenges in various complex application scenarios.
Who are these "superheroes"? What are their individual talents and characteristics? As developers, how should we deploy these industrial Ethernet connectors to ensure they each fulfill their roles and become guardians of reliable interconnection? Today, we'll take a comprehensive look at HARTING's industrial Ethernet connectors as an example.
"Superheroes" in Industrial Ethernet Connectors
M8 D-code connector
Since its introduction in 1985, the M12 connector has played a vital role in industrial automation interconnection. This circular connector with a 12mm locking thread offers IP protection against liquid and solid ingress, ensuring reliable connections even in harsh environments. Due to its wide range of applications, the M12 connector uses various key codes to define different applications to avoid mis-mating, with the D-coded connector specifically designed for 100Mbps Fast Ethernet connections.
HARTING offers a very comprehensive portfolio of M12 connectors, providing products with various encoding options. However, to meet the miniaturization requirements of industrial Ethernet connectors, HARTING has specifically introduced the M8 D-encoded connector (8mm locking thread).
This product supports a data transmission rate of 100Mbps and PoE power supply, and achieves an IP67 waterproof and dustproof rating, providing excellent reliability and data transmission integrity under field-level industrial conditions.
It's worth mentioning that the M8 D-coded connector is 30% smaller than the classic M12 connector! It can be said that it is the ideal choice for miniaturizing the traditional M12 D-coded connector.
PushPull 2.0 Variant 4 Industrial Connector
While the M12 circular connector is technically mature and highly reliable, its housing seals require a certain pressure to fully close and achieve a good seal. Therefore, special tools are usually needed to properly "clamp" the connector plug and tighten it to the appropriate torque during connection, which obviously reduces its ease of use.
HARTING's push-pull connector solves this problem perfectly. As the name suggests, push-pull connectors do not require special tools; simply pushing and pulling is all it takes to insert and remove the connector.
The PushPull 2.0 Variant 4 (V4) industrial connector is a new product launched for the robotics and industrial automation market. Its key feature is that it replaces three traditional seals with a single sealing gasket, simplifying the structure and mating operation while ensuring a sufficient IP rating. Its new chemical-resistant housing material also protects the product from gases, liquids, and vibrations, easily meeting the connectivity needs of harsh environments.
The PushPull V4 industrial connector features an internal locking mechanism for easy insertion and removal, and emits a "click" sound upon proper installation. This connector also has an additional anti-rotation device that secures the PushPull locking assembly in the inserted position, ensuring connection reliability and preventing accidental pull-out. To accelerate plug-and-play functionality, the second-generation PushPull incorporates two different color-coded indicators to identify whether the connector and slot are aligned correctly and to confirm proper plug-slot configuration, reducing mating errors and saving assembly time.
Therefore, if you need an industrial Ethernet connector that is easy to install in the field, while also being reliable and compact, the PushPull 2.0 Variant 4 can be included in the BOM list.
Han1A Heavy-Duty Connector
The HARTING Han1A heavy-duty connector is also an excellent choice for achieving miniaturization and lightweighting of industrial interconnects.
The Han1A is a comprehensive product with up to 12 contacts, and its ferrules can be used for power, signal, and data transmission—power transmission up to 16A/400V; and for data transmission, it supports Cat. 5 or Cat. 6A performance; and shielded versions are also available for areas with strong signal interference.
Compared to its predecessor, the Han3A, the Han1A is 30% smaller. It is also very lightweight thanks to the use of lightweight materials.
The Han1A's insert-type locking buckle integrates the connector's locking structure with the ferrule into a single unit. No tools are required; a gentle push and a "click" sound confirms the connection. Users can also add external metal retaining clips for an extra layer of security.
It is particularly worth mentioning that Han1A also inherits the modular design concept of the Han family of products. Customers can freely match different components according to different application scenarios and needs to achieve different functions and protection levels (up to IP65), and obtain a more cost-effective, flexible and scalable exclusive solution.
Therefore, if you are looking for a modular industrial Ethernet interconnect solution that is not afraid of harsh industrial and outdoor environments, can achieve easy connectivity under shock and vibration conditions, and is lightweight, flexible and easy to use, then the Han1A is the right choice!
ix Industrial Ethernet connector
To better adapt to the application requirements of industrial Ethernet, connector manufacturers are improving existing interface standards and products such as M12, PushPull, and modular connectors. They are also actively promoting the development and application of new proprietary interface standards. The ix Industrial interface is one such new industrial Ethernet interface standard that has received considerable attention in recent years.
The original intention of ix Industrial connectors was to replace traditional RJ45 connectors. They are 70% smaller than RJ45 connectors, more powerful, more robust and reliable, and all comply with the IEC61076-3-124 standard, ensuring compatibility between products.
HARTING is also a strong advocate for the ix Industrial interface standard, and its ix Industrial connectors support 1Gbps/10Gbps Ethernet performance (Cat. 6A) with up to 5000 mating cycles. The connector uses two stable metal latches to actively lock the receptacle and connector, providing clear tactile feedback to help users confirm a secure connection. Furthermore, the connection between the cable sheath and plug in these Ethernet connectors uses a robust crimp connection, ensuring interface strength and meeting the high shock and vibration resistance requirements specified in EN 50155 railway standard.
HARTING's ix Industrial connectors are available in Type A (Cat. 6A Ethernet) and Type B (signal and bus communication) versions, and are constantly developing more wiring and mounting options, including PCB board mounting options such as bend, right angle, and horizontal.
In short, HARTING's ix Industrial connectors deliver high-performance data transmission and, through a redefined form factor and locking/assembly mechanisms, create a fully optimized industrial Ethernet interconnect solution, making them the ideal choice for upgrading industrial Ethernet device hardware interconnects.
T1 Industrial Single-Pair Ethernet (SPE) Connector
ix Industrial connectors are highly favored, but those familiar with industrial Ethernet interconnect technology trends will know that another technology has been generating even more buzz in the past two years: the Single Pair Ethernet (SPE) connector.
As we all know, traditional industrial Ethernet commonly uses 4-core (2 pairs) or 8-core (4 pairs) twisted-pair cables for connection. However, the SPE connector only requires one pair of twisted-pair cables to achieve a transmission rate of 1Gbps and a transmission distance of up to 1km. This brand-new architecture has a revolutionary advantage in cost-effectiveness, which will undoubtedly change the future ecosystem of industrial Ethernet. Therefore, it is regarded as the rising star of industrial Ethernet interfaces. Some analysts say that the SPE connector may replace the ix Industrial connector as the mainstream architecture in the future.
Figure 1: SPE Single-Pair Ethernet Interconnect System Architecture
(Image source: HARTING)
In response to the development and application trends of SPE, HARTING has launched the T1 Industrial SPE connector. This product features a highly optimized high-frequency design with 360° shielding, high mechanical strength, and a standards-compliant design that meets all expectations for SPE.
The T1 connector enables Ethernet data transmission from 10Mbps to 1Gbps using only two wires and can simultaneously power the terminal device via Power over Data Line (PoDL). These connectors are rated at 60VDC, have a mating cycle of 1,000 times, and operate in a temperature range of -40°C to +85°C. Their compact form factor makes them easy to install into common housings such as M12, M8, PushPull, and SnapIn. They offer IP20 to IP65/67 sealing ratings to meet the requirements of a wide range of industrial IoT applications. The introduction of these products will also play a positive role in promoting the standardization and application of SPE single-pair Ethernet.
Therefore, if you are planning ahead for future industrial Ethernet products and solutions, starting with HARTING's T1 Industrial SPE connector is definitely a good choice.
Summary of this article
Industrial Ethernet has a promising future, but everyone knows that ensuring high-performance, high-reliability interconnection in complex and harsh industrial environments is no easy task, and sometimes it even seems like an "impossible task".
Fortunately, we have many "superhero" industrial Ethernet connectors with "superpowers" to help us. They either deeply explore and optimize existing technologies and standards, or unleash their superpowers on a newly defined standard. Together, they help users at all levels realize their long-cherished wish to build industrial Ethernet.
