Moxa CP-134U-I-DB9M , 4-Port RS422/485-PCI-Universal content_copy

The Moxa CP-134U-I-DB9M is a 4-port serial card for Universal PCI, specifically designed for industrial automation applications requiring robust and long-term stable serial communication over long distances. The card supports the serial standards RS-422 and RS-485 on all four ports, with two ports additionally supporting RS-232. This combination makes it particularly suitable for PC-based data acquisition systems, control units, and embedded installations where flexible connection to various serial devices is required. The integrated ADDC® technology enables automatic control of data direction for RS-485 connections, simplifying implementation in complex networks and reducing configuration effort.

Applications

The card is used in industrial environments where reliable serial communication with multiple devices is required, for example in process automation, machine control, or data transmission between sensors and control devices. The support for RS-422/485 enables communication over long distances with low susceptibility to interference, making it suitable for applications in factories, power supply facilities, or heavy industry. The CP-134U-I variant offers additional 2 kV isolation, which makes operation in noisy environments safer, for example in installations with high electrical voltages or strong electromagnetic fields.

Functions and Features in Detail

The CP-134U-I-DB9M features a 128-byte FIFO buffer, which accelerates data transfer and reduces CPU load. The maximum baud rate is 921.6 kbps, enabling high-speed communication. The card supports various data formats: data bits from 5 to 8, stop bits 1, 1.5, or 2, and parity types including None, Even, Odd, Space, and Mark. Flow control can be implemented via hardware (RTS/CTS) or software (XON/XOFF), facilitating adaptation to different devices and requirements. The card is equipped with a Moxa Turbo Serial Engine™ chip, which enhances the performance and reliability of the serial interface.

Technology Explained Simply

The card operates on the Universal PCI bus, is 32-bit compatible, and supports both 3.3 V and 5 V operating voltages, enabling use in various PC systems. The MU860 controller is compatible with the 16C550C standard, a widely used serial controller, which simplifies integration into existing systems. The card can support up to eight cards per PC, ensuring scalability for larger installations. The 2 kV isolation protects the card and system from transient voltage spikes caused by electrical disturbances or overvoltages.

Compatibility and Accessories

The CP-134U-I-DB9M is compatible with various operating systems, including Windows (from DOS to Windows 10/Server 2019, including CE and XP Embedded), Linux (kernel 2.4 to 5.x), and UNIX systems such as QNX, Solaris, SCO, UnixWare, and FreeBSD. The card is supplied with an M44 to 4 x DB9-M or DB25-M cable, depending on the model variant, enabling direct connection to standard serial devices. The delivery also includes a quick start guide, a substance overview, and a warranty card.

Installation and Mounting

Installation is performed by inserting the card into a free PCI slot of the computer. The card is equipped with a DB44 female connector, to which the supplied cable is connected. Configuration is done via software drivers available for the supported operating systems. The card requires no additional drivers or special installation steps, as it uses standardized interfaces.

Operational Advantages

The card offers high reliability through integrated ADDC® technology and 2 kV isolation, minimizing interference. Support for up to eight cards per system enables flexible scaling. The high baud rate and FIFO buffer ensure efficient data transfer. Compatibility with various operating systems increases flexibility in system integration. Operating temperature ranges are from 0 to 55 °C (standard) and from -40 to 85 °C (wide temperature), enabling use in different environments. Storage temperature is -40 to 85 °C, and relative humidity is between 5 and 95 % (non-condensing). Certifications include EMI (CISPR 32, FCC Part 15B), EMS (IEC 61000-4-2/3), MTBF (480,209 hours according to Telcordia SR332), as well as environmental standards such as RoHS, CRoHS, and WEEE.

General
FIFO memory	128 Bytes
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2
Power supply	3.3 V / 5 V
Maximum number of cards per system	8
Input power	180 / 850 mA @ 5 V DC
Air humidity	5–95 % (nicht kondensierend)

---