General
Number of serial ports	4
FIFO buffer	128 Bytes
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2

The Moxa CP-134U-I-T is a 4-port universal PCI serial card specifically developed for use in industrial automation environments. It enables the connection of serial devices to a PC via RS-422/485 interfaces, with two of the four ports additionally supporting RS-232. The card is designed for data acquisition and control tasks, particularly in multi-point systems where communication links up to 1.2 km in length are required. The integrated Turbo Serial Engine™ technology ensures efficient data transmission with a maximum baud rate of 921.6 kbps. A 128-byte FIFO buffer guarantees uninterrupted data flow, which is important for reliability in real-time applications.

Applications

The card is suitable for applications in industrial automation, such as communication with sensors, actuators, control devices, or machine controls. It is used in environments where a stable serial connection over long distances is required, for example in manufacturing automation, power supply, or building automation. The support for RS-485 in 2- and 4-wire technology enables flexible connections to various device configurations.

Functions and Features in Detail

The CP-134U-I-T features automatic data direction control (ADDC®), which ensures precise RS-485 communication and reduces the need for manual control inputs. The card provides 2 kV isolation between the serial ports and the PCI bus, enhancing electrical safety and minimizing interference from voltage spikes or potential differences. Signal definitions include standards for RS-232, RS-422, and RS-485, with support for both 4-wire and 2-wire variants of RS-485. Flow control can be implemented via RTS/CTS or XON/XOFF, with an option also available for no flow control.

Technology Explained Simply

The card uses a 32-bit universal PCI bus, compatible with both 3.3 V and 5 V, and also supports PCI-X systems. This allows installation in a wide range of industrial PCs. The maximum number of cards installable per PC is eight, ensuring scalability for larger systems. The operating temperature for the wide-temperature version ranges from -40 to 85 °C, enabling use in extreme environments, such as outdoor installations or climate-stressed production halls. The humidity range of 5 to 95 % (non-condensing) covers typical industrial conditions.

Compatibility and Accessories

The card supports a wide range of operating systems, including Windows (95 to 10, Server 2003 to 2019, Embedded CE/XPe), Linux (kernel 2.4.x to 5.x), and various UNIX systems such as QNX, SCO, Solaris, UnixWare, and FreeBSD. Driver support facilitates integration into existing system environments. The connection technology uses a DB44 socket, which connects via an included cable to four DB9M or DB25M connectors. This enables connection to standard serial peripheral devices.

Installation and Mounting

Installation is performed by inserting the card into a free PCI slot of the computer. The card is compact in size (115 x 120 mm) and fits into standard PC enclosures. The included quick installation guide supports installation and configuration. Power supply is provided via the PCI bus, with the CP-134U-I-T consuming 850 mA at 5 VDC.

Operational Advantages

High reliability is emphasized by an MTBF of 480,209 hours (according to Telcordia SR332) and a 5-year warranty. EMC certifications according to EN 55032/35, CISPR 32, and FCC Part 15B Class B, as well as EMS certification according to IEC 61000-4-2/3, ensure a safe and interference-free operating environment. The combination of high transmission rate, isolation, and extended temperature tolerance makes the card a robust solution for demanding industrial applications.

The card is delivered with a Quick Installation Guide, a Warranty Card, and a Substance Disclosure Table. The included cable connection enables connection to standard DB9M or DB25M connectors.