Longshine LCS-6321M PCI Express x1 2-Port RS232 Serial I/O Card with Low Profile Bracket

The Longshine LCS-6321M is a high-performance PCI Express serial I/O card designed to add two RS232 serial ports to your computer system. Featuring the advanced ASIX AX99100 chipset, it delivers reliable data transfer rates up to 921.6 Kbps with 256-byte FIFO buffers per port. This card is ideal for industrial automation, point-of-sale systems, and legacy device connectivity.

Advantages

With native PCI Express 2.0 compliance and backward compatibility, the LCS-6321M ensures seamless integration into modern motherboards. The included low-profile bracket allows installation in compact chassis, while 15KV ESD protection safeguards against electrostatic discharge. Hardware and software flow control guarantee error-free communication.

Suitable for

• Industrial control systems
• POS terminals and barcode scanners
• Serial modems and printers
• Laboratory and measurement equipment

Key specifications

• Interface: PCI Express x1 (PCIe 2.0)
• Serial ports: 2x RS232 DB9 male
• Chipset: ASIX AX99100
• Max data rate: 921.6 Kbps
• FIFO: 256-byte per port
• UART: 16C950 compatible
• Flow control: Hardware (RTS/CTS), Software (XON/XOFF)
• Data bits: 5, 6, 7, 8
• Stop bits: 1, 1.5, 2
• Parity: Even, Odd, None, Mark, Space
• ESD protection: 15KV
• Form factor: Standard profile with low profile bracket
• OS support: Windows 7/8/10/11 (32/64-bit), Linux Kernel 2.6.x+
• Certifications: CE, FCC, RoHS

Recommendations

For optimal performance, ensure your system has an available PCI Express x1 or larger slot. The card is plug-and-play under most operating systems. For Linux, the chipset is natively supported in kernel 2.6.x and above.