General
Standards	RS-422, RS-485
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2
Air humidity	5–95 % (nicht kondensierend)
MTBF	4.147.133 Stunden

The Moxa CP-132EL-DB9M is a compact PCI Express card with two serial ports, designed for use in industrial automation systems. It supports the communication standards RS-422 and RS-485 and is particularly suitable for applications requiring stable, long-distance data transmission over multiple participants. The Low-Profile format allows installation in compact housings or embedded PCs, enabling flexible integration into existing systems. The card is equipped with a 128-byte FIFO buffer, which enhances data transmission efficiency, and supports a maximum baud rate of 921.6 kbps. The serial ports are connected via an M25-to-2x-DB9M cable (50 cm), enabling simple and standardized connection to external devices.

Applications

The CP-132EL-DB9M is used in industrial environments where serial communication over long distances and with multiple end devices is required. Typical application scenarios include connecting sensors, control devices, machines, or PLCs in production facilities, power supply systems, or building automation. The RS-485 function allows connection of up to 31 devices in a Daisy-Chain configuration over distances up to 1.2 km, making it suitable for decentralized networks. The card is available for operating systems such as Windows, Linux, and UNIX, facilitating integration into heterogeneous system environments.

Functions and Features in Detail

The card features a 16C550C-compatible communication controller, ensuring reliable data transmission. Flow control is software-based via XON/XOFF, enhancing data integrity under variable loads. The serial ports support various configurations: data bits (5, 6, 7, 8), stop bits (1, 1.5, 2), and parity types (none, even, odd, Space, Mark). Integrated LED indicators for transmit (Tx) and receive activity (Rx) per port enable quick visual diagnosis and maintenance. Power supply is via 3.3 VDC, with the CP-132EL-DB9M consuming 548 mA.

Technology Explained Simply

RS-422 and RS-485 technology enable robust, differential data transmission, resistant to interference and EMI (electromagnetic interference). RS-422 is suitable for point-to-point connections, while RS-485 is used for multi-point networks. The maximum baud rate of 921.6 kbps enables fast communication, sufficient for time-critical applications. The 128-byte FIFO buffer ensures temporary data storage to prevent overflow. The card is designed for operation in a temperature range of 0 to 55 °C and can be used at humidity levels of 5 to 95 % (non-condensing).

Compatibility and Accessories

The CP-132EL-DB9M is designed for PCI Express 1.0 bus systems and supports up to eight cards per system. Driver support includes Windows (DOS to Windows 10, Windows Server 2008–2019, Embedded CE/XPe), Linux (Kernel 2.4.x to 5.x), and UNIX systems (Solaris 10, UnixWare 7, SCO OpenServer 5/6, QNX 6). The card comes with an M25-to-2x-DB9M cable (50 cm), enabling connection to external devices. The card does not feature electrical isolation; the model CP-132EL-I-DB9M provides 2-kV isolation, offering protection against voltage spikes.

Installation and Mounting

Installation is performed by inserting the card into a free PCI Express slot. Connection to external devices is made via the included M25-to-2x-DB9M cable. The card is in Low-Profile format, allowing mounting in compact housings or embedded systems. Driver installation is done using the provided driver packages for the respective operating systems. The integrated LED indicators facilitate checking communication activity after installation.

Operational Advantages

The card offers high reliability through robust serial communication technology and support for multiple operating systems. The integrated diagnostic LEDs enable quick fault detection. The maximum baud rate of 921.6 kbps and the FIFO buffer ensure efficient data transmission. The card is designed for industrial environments, with an operating temperature range of 0 to 55 °C and humidity of 5 to 95 % (non-condensing) defining the operating conditions. Certifications according to EN 55032/35, CISPR 32, FCC Part 15B Class B, as well as IEC 61000-4-2, -3, -4, -5, -6, -8, ensure EMC compliance. The warranty period is five years.

The card includes a Quick Installation Guide and a warranty card in the delivery scope. Dimensions are 67.21 mm x 101.97 mm. The MTBF (Mean Time Between Failures) is 4,147,133 hours for the model CP-132EL-DB9M.