General
Number of ports	8
Maximum baud rate	921,6 kbps
Minimum baud rate	50 bps
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2

The Moxa CB-108-T is an 8-port RS-232 module based on the PC/104-Plus bus, a PCI-compatible standard for embedded systems. It is designed for serial communication in industrial environments where reliable and high-performance data transmission is required. The module is intended for use in compact, integrated systems featuring a PCI bus, enabling connection of multiple serial devices to a central control or data acquisition system.

Applications

The CB-108-T is suitable for applications in automation technology, such as communication with sensors, actuators, machine controls, or industrial peripheral devices. The high baud rate and integrated flow control make it particularly suitable for systems requiring continuous and error-free data transmission. Support for operating systems such as Windows, Windows CE 5.0/6.0, and Windows XP Embedded expands its usability in various industrial and embedded environments.

Functions and Features in Detail

The module features eight independent RS-232 interfaces, each equipped with a 128-byte FIFO. These FIFO buffers enhance data transmission efficiency, especially at high data rates and when multiple ports are used simultaneously. The maximum baud rate is 921.6 kbps, with support for lower rates starting at 50 bps. Configuration options include data bits (5, 6, 7, 8), stop bits (1, 1.5, 2), and parity types (None, Even, Odd, Space, Mark), all of which are flexibly adjustable. Integrated hardware flow control (RTS/CTS) and software flow control (XON/XOFF) ensure stable communication, even when transmission speeds differ between sender and receiver.

Technology Explained Simply

The interfaces are connected via a 40-pin box header, designed for integration into PC/104-Plus systems. IRQ and I/O addresses are automatically assigned by the BIOS, eliminating the need for manual configuration using jumpers or DIP switches. This simplifies installation and reduces potential errors. Transmission activity is indicated by LEDs per port, visually displaying the status of transmitting (Tx) and receiving (Rx). This facilitates quick diagnosis and maintenance during operation.

Compatibility and Accessories

The module is designed for use in systems with a PC/104-Plus bus and supports up to eight such modules per system. Software support includes operating systems such as Windows, Windows CE 5.0/6.0, and Windows XP Embedded. Optional DB9 and DB25 cable sets are available to enable easy physical connection to external devices.

Mounting and Installation

Installation is performed by inserting the module into a PC/104-Plus system. The connection terminal is a 40-pin box header, which is connected to the system bus strip by default. Configuration is handled via BIOS-assigned IRQ and I/O addresses, eliminating the need for manual settings.

Operational Advantages

The combination of high baud rate, FIFO buffers, and automatic address assignment ensures reliable and low-maintenance communication. The LED indicators allow for quick visual verification of communication activity. The module is designed for use in harsh environments, with the CB-108-T model supporting a temperature range of -40 to 85 °C, making it suitable for industrial applications under various climatic conditions. The 5-year warranty underscores the product’s reliability.

Note: Batteries are not included in the delivery scope.