General
Number of ports	2
Serial standard	RS-232
Stop bits	1, 1.5, 2
Controller	MU860 (kompatibel mit 16C550C)
FIFO memory	128 Byte
Air humidity	5–95 % (nicht kondensierend)
EMC certification	EN 55032/24
MTBF	4.947.552 Stunden (Telcordia TR/SR)

The Moxa CP-102EL-DB9M is an industrial PCI Express card with two RS-232 interfaces, specifically designed for use in industrial automation systems, Point-of-Sale devices (POS), and automated teller machines (ATM). The card is based on the CP-102E/EL series and features a Low-Profile design, making it suitable for compact systems such as 19-inch PCs or embedded platforms. It is equipped with a DB25 female connector and is supplied with a breakout cable that enables connection to two DB9 male connectors. The card supports full modem signal support and allows transmission rates up to 921.6 kbps, making it suitable for demanding serial communication tasks.

Applications
The CP-102EL-DB9M is designed for applications in industrial environments, particularly in automation technology, POS terminals, and ATMs. Its robust construction and support for RS-23表 interfaces make it ideal for connecting to older or specialized devices that lack Ethernet or USB interfaces. The card is universally usable in modern PCs, regardless of slot type, thanks to PCI Express x1 compatibility.

Features and Specifications in Detail
The card features two serial ports, each equipped with integrated LEDs for transmit (Tx) and receive data (Rx). These status indicators facilitate maintenance and fault diagnosis by visually showing whether data is being transmitted. Communication follows the RS-232 standard, supporting baud rates from 50 bps to 921.6 kbps, including non-standard values. Configuration includes various parity types (None, Even, Odd, Space, Mark), stop bits (1, 1.5, 2), and flow control methods (RTS/CTS, XON/XOFF). Signals TxD, RxD, RTS, CTS, DTR, DSR, DCD, and GND are fully supported.

Technical Explanation
The card uses a MU860 controller, compatible with the 16C550C, a widely used UART controller. This ensures reliable and high-performance serial data transmission. The integrated FIFO buffer with 128 bytes enables efficient data buffering, preventing data loss at high transmission rates. Power supply is via 3.3 VDC with a current consumption of 552 mA, sufficient for operation in standardized PC systems.

Compatibility and Accessories
The CP-102EL-DB9M is compatible with drivers for various operating systems, including Windows (from DOS to Windows 10/Server 2019, including embedded systems), Linux (kernel 2.4 to 5.x), and UNIX systems such as Solaris 10, SCO, QNX 6, and UnixWare 7. Optional accessories include a breakout cable (CBL-M25M9x2-50, DB25 to 2x DB9 male, 50 cm) and DB9 extension cables (1.5 m or 20 cm) to expand connection options.

Installation and Mounting
The card is installed into a PCI Express x1 slot of the computer. The Low-Profile design allows installation in compact enclosures that cannot accommodate standard PCI Express cards. Installation is guided by the included quick installation guide, which describes the necessary setup steps. The card is designed for operation in a temperature range of 0 to 55°C, with a storage temperature of -20 to 85°C and humidity of 5 to 95 % (non-condensing).

Operational Advantages
The high reliability of the card is underscored by an MTBF of 4,947,552 hours (according to Telcordia TR/SR). Comprehensive EMC certification (EN 55032/24, CISPR 32, FCC Part 15B Class B, IEC 61000-4-x) ensures stable performance in electromagnetically noisy environments. The 5-year manufacturer warranty provides additional security for operation in critical applications. The card also complies with environmental standards such as RoHS, CRoHS, and WEEE.