General
Interface standards	RS-232, RS-422, RS-485
Number of ports	8
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2
MTBF	1.073.385 Stunden

The Moxa CP-118U-T is an 8-port universal PCI serial card developed for industrial applications with high requirements for serial communication. It enables the connection of multiple serial devices to a PC server via a 32-bit universal PCI bus, supporting both 3.3 V and 5 V slots. The card is thus compatible with a wide range of systems, including PCI-X slots, and can be installed in up to eight units per PC. The CP-118U-T supports serial interfaces RS-232, RS-422, and RS-485, making it flexible for various application scenarios.

Applications
The card is designed for use in industrial environments where reliable and high-performance serial communication is required. Typical applications include connecting measurement devices, controls, sensors, printers, or other serial peripherals to PC-based control and monitoring systems. The support for high data transfer rates up to 921.6 kbps enables fast and efficient data transmission, even under heavy loads. The operating temperature range of -40 to 85 °C makes the card suitable for use in environments with extreme conditions, such as production halls, outdoor areas, or air-conditioned rooms under high stress.

Functions and Features in Detail
The CP-118U-T features eight serial ports, each connected via a DB62 socket. Each port is equipped with an LED indicator for transmit (Tx) and receive (Rx), simplifying diagnostics and maintenance. The card uses a MU860 controller, compatible with the 16C550C standard, and provides a 128-byte FIFO buffer that stabilizes data transmission and reduces buffer overflow. Modem control signals are fully supported, enabling communication with devices that require modem control. Flow control is handled via RTS/CTS and XON/XOFF, preventing data loss at high transmission rates.

Technology Explained Simply
The serial interfaces RS-232, RS-422, and RS-485 differ in signal transmission and range. RS-232 is suitable for short distances and point-to-point communication, while RS-422 and RS-485 are designed for longer distances and multi-point networks. RS-485 can operate in 2-wire and 4-wire configurations, with the 4-wire variant providing separate transmit and receive lines. 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. The baud rate can be set between 50 bps and 921.6 kbps, allowing adaptation to different devices and requirements.

Compatibility and Accessories
The CP-118U-T is compatible with a wide range of operating systems, including Windows (DOS to Windows 10, x86/x64, Windows Server 2008–2019, Embedded CE/XPe), Linux (kernel 2.4.x to 5.x), and various UNIX systems such as QNX 6, SCO OpenServer, UnixWare 7, Solaris 10, and FreeBSD. Driver support ensures stable integration into existing system environments. The card is designed for use in PC servers equipped with a universal PCI bus and can operate in systems with 3.3 V or 5 V slots.

Installation and Mounting
Installation is performed by inserting the card into a free PCI slot of the host computer. The DB62 sockets on the card's rear allow connection of serial devices via cables. Configuration is done through the operating system drivers, where settings for baud rate, data bits, parity, and flow control can be adjusted according to the connected device. The integrated LEDs facilitate monitoring of communication activity during operation.

Operational Advantages
The card offers high reliability with a high MTBF value of 1,073,385 hours. EMC and EMI compliance according to EN 55032/35, CISPR 32, and FCC Part 15B Class B, as well as ESD/EMS compliance according to IEC 61000-4-2 and -4-3, ensure stable operation in electromagnetically noisy environments. Certification according to RoHS, CRoHS, and WEEE guarantees environmental compatibility. The 5-year warranty underscores the product's quality and durability. The card is designed for use in industrial facilities where continuous and low-maintenance operation is required.

The CP-118U-T is thus a robust and high-performance solution for serial communication in industrial applications with high demands on reliability, temperature resistance, and compatibility.