General
Number of ports	4
Maximum baud rate	921,6 kbps
FIFO memory	128 Byte
Power supply	3,3/5 V
Air humidity	5–95 % (nicht kondensierend)
MTBF	480.209 Stunden (nach Telcordia SR332)
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2

The Moxa CP-134U-I is an industrial-grade 4-port serial card designed for use in environments with high electromagnetic interference or over long distances. The card enables serial communication via RS-232/422/485 and RS-422/485 interfaces, with two ports offering full compatibility with RS-232/422/485 and the other two ports supporting only RS-422/485. This configuration provides flexibility for integrating various serial devices in industrial automation systems. The card is designed for operation in 3.3 V and 5 V PCI/PCI-X slots and supports up to eight cards per PC, making it suitable for systems requiring a high number of serial interfaces.

Applications

The CP-134U-I is suitable for industrial applications requiring reliable serial data transmission over distances up to 1.2 km, such as in manufacturing automation, power supply, or building automation. Support for multidrop RS-485 networks with up to 31 connected devices enables the connection of multiple end devices over a single line, simplifying cabling and improving system architecture efficiency.

Features and Specifications in Detail

The card features an integrated Moxa Turbo Serial Engine™, enabling a maximum data rate of 921.6 kbps. The 128-byte FIFO memory ensures efficient data buffering and reduces processor load. Automatic data direction control (ADDC®) supports precise communication in RS-485 networks, especially in multidrop topologies. Electrical isolation of 2 kV protects connected devices from overvoltage, which is particularly important in industrial environments with high interference voltages. Each port includes an LED indicator for transmit (Tx) and receive (Rx), allowing visual monitoring of operational status.

Technical Explanation

The card uses a communication controller of type MU860, compatible with the 16C550C standard. This ensures support for a wide range of serial protocols and baud rates from 50 bps to 921.6 kbps. Data transmission occurs via a DB44 socket, connected through an interface cable with four DB9-M or DB25-M connectors. The card is designed for operation on a 32-bit Universal PCI bus and supports both 3.3 V and 5 V power supply. Power consumption for the isolated version is 850 mA at 5 VDC, which accounts for the higher power draw due to isolation.

Compatibility and Accessories

The CP-134U-I comes with comprehensive driver support for various operating systems, including Windows (DOS to Windows 10/Server 2019, x86/x64, CE 5.0/6.0, XP Embedded), Linux (Kernel 2.4.x to 5.x), and UNIX (QNX 6, SCO OpenServer, UnixWare 7, Solaris 10, FreeBSD). The card is designed for use in industrial PCs and control systems equipped with PCI/PCI-X slots. Cable connections are made via DB9-M or DB25-M connectors, with cables included in the delivery scope.

Installation and Mounting

Installation is performed by inserting the card into a free PCI/PCI-X slot of the host computer. Mechanical dimensions are 115 mm x 120 mm, ensuring compatibility with standard PC enclosures. The card is delivered with an interface cable, a quick start guide, and a warranty and environmental information sheet. Drivers for the specified operating systems are available for download from the manufacturer’s website or via the included documentation.

Operational Advantages

The card offers high reliability due to integrated isolation and robust construction. The high MTBF of 480,209 hours (according to Telcordia SR332) highlights its longevity and suitability for continuous operation. Support for various serial standards and baud rates enables connection to a wide range of devices. LED indicators simplify troubleshooting and system monitoring. The card is also certified for electromagnetic compatibility (EMC, EMI, EMS) and environmental protection (RoHS, CRoHS, WEEE), ensuring compliance with international standards.

The operating temperature for the isolated version ranges from -40 °C to 85 °C, enabling use in extreme environmental conditions. Storage temperature is also -40 °C to 85 °C, and relative humidity is between 5 % and 95 % (non-condensing).