Internal PCIe Interface Card Sunix MIO6479A — Parallel and Serial Ports, PCIe 2.0, Host Interface PCIe

Sunix MIO6479A is an internal PCIe expansion card that restores legacy connectivity by adding two RS-232 serial ports and one IEEE1284 parallel (LPT) port to systems with a PCIe slot. The card conforms to PCI Express Base Specification Revision 2.0 and works in x1, x2, x4, x8 and x16 slots, providing broad motherboard compatibility. With a compact PCB size (approx. 78 mm × 85 mm) and native SUNIX controller design, this board is intended for industrial and commercial environments where reliable serial and parallel I/O is required.

Advantages

The MIO6479A integrates a SUNIX SUN2410 native PCI Express UART and IEEE1284 controller to deliver stable serial communication and parallel printing/legacy device support. On-chip hardware auto flow control and ±15 kV ESD protection on serial lines improve data integrity and protect connected equipment. The card supports SPP, ECP, EPP and bi-directional parallel modes, offers plug-and-play installation with system-assigned I/O addresses and IRQs, and is certified to CE, FCC, RoHS and Microsoft WHQL standards for broad OS compatibility.

Suitable for

• Connecting RS-232 serial instruments, barcode scanners, modems and industrial controllers
• Adding IEEE1284 parallel port support for legacy printers, labelers and measurement devices
• Upgrading industrial PCs, point-of-sale systems and automation controllers that lack serial/parallel ports

Key specifications

• Interfaces: 2 × RS-232 serial ports, 1 × IEEE1284 parallel (LPT) port
• PCIe compatibility: PCI Express Base Spec Revision 2.0; supports x1/x2/x4/x8/x16 slots
• Controller: Native SUNIX SUN2410 PCIe UART and IEEE1284 controller
• Hardware features: on-chip hardware auto flow control for serial data
• Protection: built-in ±15 kV ESD protection on serial signals (meets IEC1000-4-2)
• Parallel modes: SPP, ECP, EPP, bi-directional parallel port
• Form factor: internal low-profile/standard bracket compatible (approx. 78 mm × 85 mm PCB)
• OS support: Microsoft Windows, Linux, DOS

How to use

Power down the computer, open the chassis and install the MIO6479A into an available PCIe slot that matches or accepts x1, x2, x4, x8 or x16 connectors. Secure the bracket, close the case and power on the system. The board supports plug-and-play so the operating system will typically assign I/O addresses and IRQs automatically; install or update drivers if required for your OS version. Connect serial devices using DB9-compatible cables to the RS-232 ports and parallel devices to the IEEE1284 connector. Verify communication parameters (baud rate, parity, stop bits, flow control) and parallel mode (SPP/ECP/EPP) in device settings or the device driver as needed.

Usage recommendations

For reliable serial communication in industrial environments, enable hardware flow control where supported and use shielded cables with proper grounding. When using the parallel port for printers or legacy devices, select the appropriate parallel mode (ECP/EPP/SPP) in the system driver to match the peripheral’s requirements. Keep drivers up to date for compatibility with newer Windows or Linux distributions.