General
Number of ports	4 -
Data bits	5, 6, 7, 8 -
Stop bits	1, 1.5, 2 -
Air humidity	5–95 % (nicht kondensierend)
MTBF	2.347.197 Std.

The CP-114EL-DB9M from Moxa is a 4-port PCI Express serial card designed for use in industrial environments such as automation systems, POS terminals, and machine communication. The card supports serial interface standards RS-232, RS-422, and RS-485, enabling a maximum transmission rate of 921.6 kbps per port. It is designed for operation in PCs with a PCI Express x1 slot and features a Low-Profile format, allowing compact installation in standard or rack systems. The integrated 128-byte FIFO memory ensures efficient data transfer, while hardware and software flow control, along with full modem control, guarantee reliable communication with various serial devices.

Applications

The card is suitable for applications requiring communication with multiple serial devices via a PC, for example in industrial automation, machine control, or Point-of-Sale systems. Support for multiple serial protocols enables connection to different end devices requiring various interfaces. The high baud rate and integrated flow control are particularly advantageous for transferring large data volumes or controlling multiple devices simultaneously.

Functions and Features in Detail

Each of the four ports can be individually configured, with communication parameters such as baud rate (50 bps to 921.6 kbps), data bits (5, 6, 7, 8), stop bits (1, 1.5, 2), and parity (none, even, odd, space, mark) freely adjustable. Signal assignment is defined for all three standards: RS-232 includes TxD, RxD, RTS, CTS, DTR, DSR, DCD, and GND; RS-422 uses Tx+, Tx-, Rx+, Rx-, and GND; RS-485 (4-wire) and RS-485 (2-wire) each use Data+, Data-, and GND. The card also supports non-standard baud rates, increasing flexibility when integrating into existing systems.

Technology Explained Simply

The communication controllers are 16C550C-compatible, providing a widely used and reliable foundation for serial communication. The 128-byte FIFO memory reduces processor load by buffering data between the interface and the host system. Integrated LEDs per port indicate transmit (Tx) and receive (Rx) status, simplifying diagnosis of connection issues. Power is supplied via the PCI Express bus at 3.3 V DC, with the CP-114EL-DB9M drawing 835 mA.

Compatibility and Accessories

The card is compatible with PCI Express 1.0 (x1) and can operate in systems with up to eight cards per PC. Software support includes various operating systems: Windows (DOS to Windows 10, Server 2019, Embedded CE 5.0/6.0, XP Embedded), Linux (kernel 2.4.x to 5.x), and UNIX systems such as QNX 6, Solaris 10, UnixWare 7, and SCO OpenServer 5/6. Available accessories include separate cables such as CBL-M44M9x4-50 (DB44 to 4 x DB9-M, 50 cm) and CBL-M44M25x4-50 (DB44 to 4 x DB25-M, 50 cm), as well as extension cables like CBL-F9M9-20 (20 cm) and CBL-F9M9-150 (1.5 m). The CP-114EL-DB9M model is supplied with the cable CBL-M44M9x4-50.

Installation and Mounting

Installation is performed by inserting the card into a PCI Express x1 slot of the computer. The card requires no additional power supply, as it is powered via the bus. The quick installation guide included in the delivery package assists with configuration. The Low-Profile form enables mounting in compact enclosures or rack systems without additional brackets.

Operational Advantages

The card offers high reliability with an MTBF of 2,347,197 hours (for the model without isolation). The integrated status LEDs simplify fault diagnosis. Broad operating system support and support for multiple serial standards increase flexibility when integrating into existing systems. The card is designed for operating temperatures from 0 to 55 °C and can be used in environments with humidity levels from 5 to 95 % (non-condensing). Certifications according to EN 55032/35, CISPR 32, FCC Part 15B Class B, and IEC 61000-4-2/3/4/5/6/8 ensure good electromagnetic compatibility. The warranty period is five years.

Delivery Contents

The delivery includes the CP-114EL-DB9M card, the cable CBL-M44M9x4-50 (DB44 to 4 x DB9-M, 50 cm), a quick installation guide, and a warranty card.