COVER STORY
The Fourth Industrial Revolution – industrial control and networking for Industry 4.0
Amid the excitement about smart factories and Industry 4.0, there is a danger that we forget about the importance of connectivity. All these concepts rely fundamentally on the reliable and accurate transmission and reception of data. Higher data volumes demand greater transmission speeds and increasingly critical data often demands near real time transmission and response. To add to the challenge, these new factory concepts are often implemented in established sites, meaning that data has to be transmitted over an established network infrastructure.
In this month’s edition, Will Mitchell, field applications engineer at Anglia, provides an overview of the latest industrial connectivity solutions from Analog Devices that have been developed to make the move to Industry 4.0 smart factories cost effectively and easy. He examines three very different options:
IO-link - a point-point solution that can be implemented on established infrastructure Industrial ethernet – a deterministic, low latency and high-bandwidth technology implementation of the popular standard Wireless mesh networks offering the stability required in industrial environments.
IO-Link
The first option to consider is the IO-Link solution from Analog Devices, which adopts the industry-standard 3-wire infrastructure. This digital solution provides a point-to-point connection between the IO-Link master and one or more IO-Link devices, either sensor or actuator, over distances up to 20m. To allow for rapid adoption and reduced time to market, IO-Link master devices work with pre-existing industrial architectures like Fieldbus. While the single-drop communication interface (SDCI) offers optimal transmission of data, IO-Link is also backward compatible for legacy binary sensors using Serial input/output (SIO) communication mode – see figure 1.
Figure 1 - IO-Link System – Orange, SDCI; Black, SIO
IO-Link technology offers a swathe of improvements, remote configurability, bi-directional communication via a digital infrastructure, collation of data direct to the cloud for system optimization or analysis, among many others. These advancements can be utilized to enhance real-time flexibility and decision-making in emerging industrial control systems, while addressing the growing demand for reduced footprint in energy-efficient devices with solutions like the MAX22514, a low-power IO-Link transceiver. Integrating both a high efficiency buck regulator and surge protection and housed in a tiny WLP or TQFN package, this robust part is ideal for smart factory sensor applications. To assist designers and reduce time to market, Analog Devices have several reference designs
including MAXREFDES174, a Time of Flight Sensor (ToF) which integrates a similar MAX22513 transceiver, that can be connected to the MAXREFDES145 IO-Link master.
Ethernet
Whilst IO-Link is effective on the factory floor, not all industrial sensors are situated in such an environment. For example, in harsh or intrinsically safe environments, field instruments need to be remotely located. Some applications also require significantly higher bandwidth and power than can be accommodated in hardwired point-to-point implementations, potentially resulting in restrictions on data throughput and power availability to sensor nodes, which in turn limit the instruments’ core functionality. Whilst standard ethernet might seem like an obvious solution - as a technology it is ubiquitous, well understood, and offers high bandwidth - its inability to guarantee deterministic performance rules it out for the highly time-dependent control systems used in industrial applications. For these scenarios, data and control signals must be reliably delivered on time, every time, or there is a risk of causing harm to the equipment or those working within the environment – enter industrial ethernet. The ADI Chronous family provides a comprehensive portfolio of industrial ethernet-based solutions with deterministic performance, low latency, and high bandwidth; all crucial features essential for enabling real-time data transmission and control. Analog Devices worked closely with the IEEE in the development of 802.3cg-2019 standard for 10-BASET1L, a 10Mbps, full duplex communication that operates over a single twisted pair delivering power and data of up to, and over, 1000m. Physical Layer devices (PHYs) such as the ADIN1100 use the 10BASE-T1L technology to offer transmission up to 1700m and supply power up to 60W in non-intrinsically safe environments enabling increased edge- node functionality versus historically less powerful industrial systems. The ADIN1300 is Analog Devices high bandwidth solution with either 10Mbps, 100Mbps, or even 1Gbps with industry-low latency and low power for the gigabit range.
10 September 2023 Components in Electronics
www.cieonline.co.uk
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