RS232 to Ethernet: Communication Expansion Board Market Size, CAGR 6.2%, and PCIe/PCI Interface
公開 2026/04/08 11:43
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Global Leading Market Research Publisher QYResearch announces the release of its latest report “Communication Expansion Board - Global Market Share and Ranking, Overall Sales and Demand Forecast 2026-2032”. Based on current situation and impact historical analysis (2021-2025) and forecast calculations (2026-2032), this report provides a comprehensive analysis of the global Communication Expansion Board market, including market size, share, demand, industry development status, and forecasts for the next few years.
Addressing core industry needs: Industrial devices often lack sufficient communication ports or support incompatible protocols (RS232 vs. CAN vs. Ethernet), creating integration headaches for system integrators. Communication expansion boards solve this by adding multiple interfaces – RS232, RS485, CAN, Ethernet, USB – enabling protocol conversion and seamless device networking. Key adoption barriers include board compatibility with legacy systems, space constraints in compact equipment, and real-time latency requirements.
The global market for Communication Expansion Board was estimated to be worth US$ 538 million in 2025 and is projected to reach US$ 815 million, growing at a CAGR of 6.2% from 2026 to 2032. Global sales reached approximately 18 million units in 2024, with an average unit price of around US$ 30.
Communication expansion boards are functional boards used to add additional communication interfaces to devices. They support multiple communication methods, such as RS232, RS485, CAN, Ethernet, and USB. They are widely used in industrial automation, power and energy, transportation, security, medical, and communications equipment, enabling multi-device networking, protocol conversion, and remote data exchange.
【Get a free sample PDF of this report (Including Full TOC, List of Tables & Figures, Chart)
https://www.qyresearch.com/reports/6097252/communication-expansion-board
Market Segmentation & Key Players
The Communication Expansion Board market is segmented as below:
Leading Suppliers: NXP, ST, Mitsubishi Electric, Schneider Electric, Siemens, Sfera Labs Srl, SUNIX, Quectel Wireless, Waveshare, Shenzhen COTRUST, Huilong Heater.
Segment by Type: PCI Expansion Board | PCIe Expansion Board | Others
Segment by Application: Industrial Automation | Electric Power and Energy | Transportation and Rail Transit | Security | Medical | Communication | Others
Exclusive Industry Insights
Discrete board-level manufacturing: Communication expansion boards are assembled in discrete batches – each board populated with specific interface chips (UART transceivers, CAN controllers, Ethernet PHYs). Lead times vary significantly: standard RS232 boards (2–3 weeks) vs. specialized industrial Ethernet boards (8–12 weeks).
Technical bottleneck – real-time determinism: Adding Ethernet expansion via standard TCP/IP introduces unpredictable latency (5–50ms), unacceptable for motion control applications. Solution: EtherCAT or PROFINET expansion boards with dedicated ASICs achieve <1ms cycle times but cost 3–4x more (US$ 80–120 vs. US$ 20–30 for standard boards).
Recent 6-month data (Oct 2025 – Mar 2026):
PCIe expansion boards overtook PCI (54% vs. 38% market share) as legacy PCI slots disappear from new industrial PCs.
5G-ready expansion boards (with Quectel modules) grew 45% YoY, driven by remote monitoring applications.
Average board dimensions decreased 15% due to component miniaturization, enabling deployment in compact DIN-rail enclosures.
User case – Smart grid substation retrofit (China, 850 sites): Legacy RS485 devices needed Ethernet backhaul for central monitoring. Installing RS485-to-Ethernet expansion boards (US$ 38 each) avoided complete equipment replacement, saving an estimated US$ 4.7M across the project. Payback period: 6 months.
Technical standard update (December 2025): IEC 61131-2 revision now mandates electrical isolation (1.5kV minimum) on all industrial expansion boards. Non-isolated boards (currently 25% of low-cost segment) face phase-out by 2027.
Regional snapshot: Asia-Pacific leads with 52% revenue share (China 34%, driven by factory automation). North America fastest-growing (CAGR 7.1%) due to aging infrastructure modernization. Europe focused on industrial Ethernet expansion for Industry 4.0 initiatives.
Conclusion
The communication expansion board market is driven by industrial IoT adoption, legacy equipment retrofits, and real-time connectivity demands. Success depends on reducing form factors, supporting emerging protocols (TSN, 5G), and maintaining backward compatibility. The projected US$ 815 million market by 2032 appears achievable, with PCIe and industrial Ethernet boards as key growth segments.
Contact Us:
If you have any queries regarding this report or if you would like further information, please contact us:
QY Research Inc.
Add: 17890 Castleton Street Suite 369 City of Industry CA 91748 United States
EN: https://www.qyresearch.com
E-mail: global@qyresearch.com
Tel: 001-626-842-1666(US)
JP: https://www.qyresearch.co.jp
Addressing core industry needs: Industrial devices often lack sufficient communication ports or support incompatible protocols (RS232 vs. CAN vs. Ethernet), creating integration headaches for system integrators. Communication expansion boards solve this by adding multiple interfaces – RS232, RS485, CAN, Ethernet, USB – enabling protocol conversion and seamless device networking. Key adoption barriers include board compatibility with legacy systems, space constraints in compact equipment, and real-time latency requirements.
The global market for Communication Expansion Board was estimated to be worth US$ 538 million in 2025 and is projected to reach US$ 815 million, growing at a CAGR of 6.2% from 2026 to 2032. Global sales reached approximately 18 million units in 2024, with an average unit price of around US$ 30.
Communication expansion boards are functional boards used to add additional communication interfaces to devices. They support multiple communication methods, such as RS232, RS485, CAN, Ethernet, and USB. They are widely used in industrial automation, power and energy, transportation, security, medical, and communications equipment, enabling multi-device networking, protocol conversion, and remote data exchange.
【Get a free sample PDF of this report (Including Full TOC, List of Tables & Figures, Chart)
https://www.qyresearch.com/reports/6097252/communication-expansion-board
Market Segmentation & Key Players
The Communication Expansion Board market is segmented as below:
Leading Suppliers: NXP, ST, Mitsubishi Electric, Schneider Electric, Siemens, Sfera Labs Srl, SUNIX, Quectel Wireless, Waveshare, Shenzhen COTRUST, Huilong Heater.
Segment by Type: PCI Expansion Board | PCIe Expansion Board | Others
Segment by Application: Industrial Automation | Electric Power and Energy | Transportation and Rail Transit | Security | Medical | Communication | Others
Exclusive Industry Insights
Discrete board-level manufacturing: Communication expansion boards are assembled in discrete batches – each board populated with specific interface chips (UART transceivers, CAN controllers, Ethernet PHYs). Lead times vary significantly: standard RS232 boards (2–3 weeks) vs. specialized industrial Ethernet boards (8–12 weeks).
Technical bottleneck – real-time determinism: Adding Ethernet expansion via standard TCP/IP introduces unpredictable latency (5–50ms), unacceptable for motion control applications. Solution: EtherCAT or PROFINET expansion boards with dedicated ASICs achieve <1ms cycle times but cost 3–4x more (US$ 80–120 vs. US$ 20–30 for standard boards).
Recent 6-month data (Oct 2025 – Mar 2026):
PCIe expansion boards overtook PCI (54% vs. 38% market share) as legacy PCI slots disappear from new industrial PCs.
5G-ready expansion boards (with Quectel modules) grew 45% YoY, driven by remote monitoring applications.
Average board dimensions decreased 15% due to component miniaturization, enabling deployment in compact DIN-rail enclosures.
User case – Smart grid substation retrofit (China, 850 sites): Legacy RS485 devices needed Ethernet backhaul for central monitoring. Installing RS485-to-Ethernet expansion boards (US$ 38 each) avoided complete equipment replacement, saving an estimated US$ 4.7M across the project. Payback period: 6 months.
Technical standard update (December 2025): IEC 61131-2 revision now mandates electrical isolation (1.5kV minimum) on all industrial expansion boards. Non-isolated boards (currently 25% of low-cost segment) face phase-out by 2027.
Regional snapshot: Asia-Pacific leads with 52% revenue share (China 34%, driven by factory automation). North America fastest-growing (CAGR 7.1%) due to aging infrastructure modernization. Europe focused on industrial Ethernet expansion for Industry 4.0 initiatives.
Conclusion
The communication expansion board market is driven by industrial IoT adoption, legacy equipment retrofits, and real-time connectivity demands. Success depends on reducing form factors, supporting emerging protocols (TSN, 5G), and maintaining backward compatibility. The projected US$ 815 million market by 2032 appears achievable, with PCIe and industrial Ethernet boards as key growth segments.
Contact Us:
If you have any queries regarding this report or if you would like further information, please contact us:
QY Research Inc.
Add: 17890 Castleton Street Suite 369 City of Industry CA 91748 United States
EN: https://www.qyresearch.com
E-mail: global@qyresearch.com
Tel: 001-626-842-1666(US)
JP: https://www.qyresearch.co.jp
About Us：
QYResearch founded in California, USA in 2007, which is a leading global market research and consulting company. Our primary business include market research reports, custom reports, commissioned research, IPO consultancy, business plans, etc. With over 18 years of experience and a dedi…
QYResearch founded in California, USA in 2007, which is a leading global market research and consulting company. Our primary business include market research reports, custom reports, commissioned research, IPO consultancy, business plans, etc. With over 18 years of experience and a dedi…
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