Controller multi I/O EXSYS EX-48023 Mini PCIe 2S Serial RS-232/1P Parallel

The EXSYS EX-48023 adds two RS-232 serial ports and one parallel port to systems with a Mini PCIe slot, using the MosChip MCS9901CV controller for reliable legacy I/O expansion. Unlike USB adapters, this internal card provides native PCIe connectivity with full register-level compatibility, ideal for industrial PCs, POS terminals, and embedded systems that require direct access to serial and parallel peripherals.

Highlights

• Dual RS-232 serial ports with data rates up to 230.4 Kbps
• One parallel port supporting SPP, EPP, and ECP modes
• Mini PCIe full-size form factor with bus power
• Broad OS support: Windows XP to 11, Server, and Linux kernel 2.6+
• Internal header connectors for clean integration

In daily use

The EX-48023 is a practical solution for connecting legacy serial and parallel devices to modern compact systems. The two serial ports handle barcode scanners, industrial sensors, or console connections, while the parallel port supports older printers or custom hardware. The card draws power directly from the Mini PCIe slot, eliminating extra cables. Breakout cables are not included, so plan for optional cabling to connect to external devices.

Full specifications

• Interface: Mini PCI Express (PCIe), Base Specification 1.1
• Serial ports: 2x RS-232, 16-byte FIFO buffers
• Parallel port: 1x, SPP/EPP/ECP, up to 1.5 MB/s
• Serial baud rate: up to 230.4 Kbps
• Serial data bits: 5, 6, 7, 8; stop bits: 1, 1.5, 2
• Serial parity: Even, Odd, None, Space, Mark
• Connectors: 2x 10-pin header (serial), 1x 26-pin header (parallel)
• Form factor: Mini PCIe full-size
• Power source: Mini PCIe bus power
• OS support: Windows XP/7/8/10/11, Server, Linux kernel 2.6+

Final note

The EX-48023 provides a straightforward way to retain legacy I/O in modern Mini PCIe-equipped systems, with a proven chipset and wide driver support.