The technologies associated with the Internet of Things (IoT) and machine to machine (M2M) connectivity are enabling a new wave of wireless networking applications within the industrial automation sector.
According to the latest global market study by Berg Insight, annual shipments of wireless devices for industrial automation applications reached 4.6 million units worldwide in 2018, accounting for approximately 6 percent of all new connected nodes.
Growing at a compound annual growth rate (CAGR) of 16.3 percent, annual shipments are expected to reach 9.9 million in 2023. Moreover, the installed base of wireless IoT devices in industrial automation applications reached 21.3 million units in 2018.
Industrial automation market development
While wired networking solutions are still predominantly used for industrial communications between sensors, controllers and systems, wireless solutions have gained a strong foothold in a number of applications.
Wireless solutions are used for wire replacement in parts of the plant that are hard to reach or uneconomical to connect through wired installations. In factory automation, wireless solutions are widely used to control cranes and automated guided vehicles (AGVs) in material handling applications.
In process automation, wireless technologies are increasingly used to connect instruments, enabling plant operators to monitor and optimize processes in hazardous areas, while also ensuring worker safety.
Leading systems vendors of wired industrial network equipment also offer wireless solutions to enable customers to monitor and control devices wirelessly in parts of the plant that are normally not connected to the control room due to accessibility or wiring costs.
These vendors include Siemens, Cisco, Belden, Moxa and Phoenix Contact, which all offer comprehensive portfolios of industrial wireless devices such as routers, gateways and wireless access points along with their wired solutions.
Industrial wireless solutions are also offered by many mid and small-sized companies, which often specialise in specific product categories. Wireless I/O and field devices are provided by the major industrial automation vendors including Emerson, Yokogawa, Honeywell, ABB, Schneider Electric, Siemens, Endress+Hauser and Pepperl+Fuchs.
“Robust connectivity is critical to support industrial IoT use cases surrounding predictive maintenance and digital twins,” said Fredrik Stålbrand, IoT analyst at Berg Insight.
According to the Berg assessment, Installation and maintenance of wireless solutions are more flexible and economical compared to wired technologies, enabling reconfigurable manufacturing system design.
Outlook for wireless IoT applications growth
Although reliability and security remain a challenge, Wi-Fi has emerged as the most widely used wireless technology in industrial environments largely due to the wide availability of compatible hardware.
There is also a growing trend among large industrial companies to deploy private 4G LTE networks instead of using Wi-Fi and even wired solutions.
“The introduction of 5G cellular technologies broadens the addressable market for wireless communications even further as it allows for deployments in situations where requirements related to bandwidth, latency and capacity cannot be fulfilled today” concluded Stålbrand.