Sunix COMCARD-2P SER5037A is a high-quality dual-port RS-232 serial communication PCI card designed to expand your PC's connectivity with two independent serial ports. Equipped with a SUNIX SUN1989 controller compatible with the 16C950 UART standard, it supports reliable serial data transfers with a 128-byte hardware FIFO buffer.

The card is compatible with Universal PCI slots (64/32-bit) supporting both 3.3V and 5V signaling, ensuring flexible installation across a variety of systems. Each DB9 port offers full RS-232 signaling lines including TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND, and RI, delivering robust communication capabilities.

With support for baud rates ranging from 50 bps up to 115.2 kbps and diverse data format options (5-8 data bits, 1-2 stop bits, various parity modes), it accommodates a wide range of serial devices and applications. Flow control options include None, Xon/Xoff, and RTS/CTS for adaptable communication management.

The product provides extensive driver support across numerous operating systems, including all major Windows client and server versions, Linux kernels, DOS, FreeBSD, QNX, and others, making it suitable for both legacy and modern computing environments. WHQL-certified Windows drivers ensure seamless integration.

This reliable board includes ±2KV ESD protection per signal line, meeting rigorous regulatory standards like CE, FCC, BSMI, and RoHS compliance. Operational tolerance extends from 0 to 60°C and 5-95% humidity, ensuring stable performance in various environments.

Installation is straightforward with a standard full-height bracket form factor (121 mm) and compact PCB size (120 x 82 mm). Perfect for industrial PCs, embedded systems, and networking devices requiring stable serial communications.

For more detailed product information, drivers, and manuals, visit the [Sunix official SER5037A product page](https://www.sunix.com/product/ser5037a.html).