Global Leading Market Research Publisher QYResearch announces the release of its latest report “PCI Serial Port Cards – 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 PCI Serial Port Cards market, including market size, share, demand, industry development status, and forecasts for the next few years.
For industrial automation engineers, POS system integrators, and lab equipment managers, modern computers lack native serial ports, yet countless legacy devices—barcode scanners, POS terminals, industrial sensors, printers, and instrumentation—still require RS-232, RS-422, or RS-485 connectivity. The PCI serial port card addresses this through multi-port serial expansion: add-in cards for desktops, workstations, or industrial PCs via standard PCI or PCIe bus, providing 2-16 serial ports with higher data stability, stronger electromagnetic compatibility (EMC), and hardware flow control compared to motherboard-integrated ports or USB adapters. According to QYResearch’s updated model, the global market for PCI Serial Port Cards was estimated to be worth US$ 348 million in 2025 and is projected to reach US$ 444 million, growing at a CAGR of 3.6% from 2026 to 2032. In 2024, global sales of PCI Serial Port Cards reached approximately 8 million units, with an average market price of about USD 42. A PCI Serial Port Card is a computer expansion card that adds one or more serial ports (such as RS-232, RS-422, or RS-485) to desktops, workstations, or industrial PCs via the standard PCI bus. It is commonly used to connect external serial devices like barcode scanners, POS terminals, industrial sensors, printers, and instrumentation. Compared to motherboard-integrated serial ports, PCI Serial Cards provide more ports, higher data stability, and stronger electromagnetic compatibility, making them suitable for industrial, research, or commercial applications requiring multiple serial communications. Some models include buffering, hardware flow control, or multi-protocol support, ensuring reliable data transmission and centralized management for automation systems and monitoring equipment that require long-term stable operation.
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1. Product Segmentation by Port Count
PCI serial port cards are segmented by number of ports, determining cost and application fit:
| Port Count | Typical UART | FIFO Buffer | Max Baud Rate | Key Applications | Price (USD) | Market Share (Units) |
|---|---|---|---|---|---|---|
| 2-port | 16550 (16-byte FIFO) | 16 bytes | 115.2 kbps | POS systems, single device connections | $25-45 | 55% |
| 4-port | 16550 or 16C1050 | 16-64 bytes | 115.2-921.6 kbps | PLC programming, lab instruments, multi-device | $45-80 | 35% |
| 8-port+ | 16C1050 (64-byte FIFO) | 64 bytes | 921.6 kbps | Factory automation, data acquisition | $80-200 | 10% |
Key technical challenge – interrupt sharing and driver stability: Multi-port cards generate multiple interrupts, requiring robust driver support. Over the past six months, several advancements have emerged:
- MOXA (February 2026) introduced a PCIe serial card with MSI (Message Signaled Interrupts) support, eliminating interrupt sharing conflicts (common issue with legacy PCI cards).
- Advantech (March 2026) commercialized a 4-port PCIe card with software-selectable RS-232/422/485 per port (no jumpers) and ±15kV ESD protection, reducing configuration errors.
- StarTech (January 2026) launched a 2-port PCIe card with 16550 UART and 256-byte FIFO (upgraded from 16-byte), reducing CPU overhead for high-speed data rates (921.6 kbps).
Industry insight – PCI vs. PCIe transition: 8 million units in 2024, with PCIe cards growing (60% of units) and legacy PCI declining (20%). PCIe cards offer higher bandwidth (x1 = 250 MB/s vs. PCI 133 MB/s), lower latency, and better driver support. However, many industrial PCs still use PCI slots for legacy compatibility; vendors continue to supply PCI cards.
2. Market Segmentation: Port Count and Application
The PCI Serial Port Cards market is segmented as below:
Key Players: Advantech, MOXA, Digi International, SIIG, StarTech.com, Brainboxes, Perle Systems, Lava Computer, Sealevel Systems, ADLINK Technology, SUNIX, Utek Technology, UGREEN, Langzhiguang Technology
Segment by Type:
- 2-port – Largest volume segment (55% of 2025 units). POS, single-device, cost-sensitive.
- 4-port – 35% of units. Multi-device control, lab automation.
- Others (8-port, 16-port) – 10% of units. High-density factory automation.
Segment by Application:
- Industrial – Largest segment (70% of revenue). Factory automation (PLC programming, machine monitoring), laboratory instruments (spectrometers, analyzers), CNC control, robotics, test equipment.
- Commercial – 30% of revenue. POS systems (barcode scanners, receipt printers), ATMs, kiosks, security systems.
Typical user case – retail POS system upgrade: A retail chain upgrades 500 POS terminals from old PCs (with onboard serial) to new thin clients (no serial ports). Each terminal: 2-port PCIe serial card ($35) connected to barcode scanner (RS-232) and receipt printer (RS-232). Total cost: $17,500. Alternative: USB-to-serial adapters ($15 each × 2 ports × 500 = $15,000) but with higher latency, cable clutter, and driver issues (USB COM port reassignment after reboot). PCIe cards provide fixed COM port mapping, critical for POS software.
Exclusive observation – “COM port mapping” advantage: USB-to-serial adapters dynamically assign COM port numbers (e.g., COM5 today, COM7 after reboot), breaking POS software expecting fixed COM ports. PCI/PCIe serial cards have fixed COM ports (set by card slot or BIOS), eliminating this issue. For mission-critical systems (ATMs, POS, medical devices), PCIe cards are preferred despite higher cost.
3. Regional Dynamics and Industrial Automation
| Region | Market Share (2025) | Key Drivers |
|---|---|---|
| Asia-Pacific | 50% | Largest industrial base (China, Japan, South Korea), electronics manufacturing, POS/ATM expansion |
| North America | 25% | Legacy industrial automation, lab instrumentation, retail POS upgrades |
| Europe | 20% | German manufacturing, pharmaceutical automation |
| RoW | 5% | Emerging industrial automation |
Exclusive observation – “industrial PC” market correlation: The PCI serial port card market correlates with industrial PC (IPC) shipments. Each IPC typically includes 1-2 serial cards (2-8 ports). 2024 IPC shipments: 15M units (Statista). 8M serial cards sold → 0.53 cards per IPC. In 2020, ratio was 0.8 cards per IPC; decline due to motherboards with integrated serial ports (still available for IPC). PCIe cards are replacing PCI, but overall serial port demand is stable.
4. Competitive Landscape and Outlook
| Tier | Supplier | Key Strengths | Focus |
|---|---|---|---|
| 1 | Industrial specialists | MOXA, Advantech, Digi, ADLINK, Sealevel, Brainboxes | Industrial-grade (wide temp, isolation), WHQL drivers, Linux support, long-term availability (10+ years) |
| 1 | Broadline/consumer | StarTech, SIIG, UGREEN | Wide distribution, consumer price points, ease of installation |
| 2 | Regional/value | Perle, Lava, SUNIX, Utek, Langzhiguang | Regional focus, cost-competitive |
Technology roadmap (2027-2030):
- PCIe 5.0 serial cards – Higher bandwidth enabling 4+ Mbps serial rates for high-speed instruments.
- Time-sensitive networking (TSN) serial cards – Deterministic timing for synchronized industrial control.
- Secure serial cards – Hardware encryption for financial (ATM, POS) and government applications.
With 3.6% CAGR and 8 million units sold in 2024 (projected 9.5M+ by 2030), the PCI serial port card market is mature but stable, driven by industrial automation, POS systems, and legacy equipment support. Risks include decline of PCI bus (replaced by PCIe), competition from USB-to-serial adapters (lower cost, but less reliable for mission-critical), and industrial PC trend toward integrated serial ports (reducing need for expansion cards).
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