Moxa CB-114-T , 4-port PC-104 Plus content_copy

The Moxa CB-114-T is a 4-port serial communication module for embedded systems, based on the PC/104-Plus bus, designed for industrial applications requiring multiple serial interfaces. It enables connection to devices communicating via RS-232, RS-422, or RS-485, with interface types per port individually selectable via DIP switches. The module is designed for use in compact, modular systems operating on a PCI-based bus, providing a robust solution for data acquisition and control in demanding environments.

Applications
The CB-114-T is suitable for industrial applications where multiple serial devices need to be connected to an embedded system, such as in automation technology, machine control, process monitoring, or building automation. Support for various serial standards (RS-232, RS-422, RS-485) enables integration of different peripheral devices, such as sensors, actuators, printers, or industrial controllers. The high baud rate and integrated flow control ensure reliable data transmission even under heavy loads.

Functions and Features in Detail
Each of the four ports features a 128-byte FIFO buffer, supporting data buffering and enhancing communication efficiency. The maximum baud rate is 921.6 kbps, enabling fast data transfer. Flow control can be implemented via hardware (RTS/CTS) or software (XON/XOFF), preventing overloads and data loss. Status LEDs for transmit (Tx) and receive (Rx) on each port facilitate visual diagnostics during operation and aid in troubleshooting.

Technology Explained Simply
The module uses the PC/104-Plus bus, a standardized, compact bus for embedded systems based on PCI. Communication occurs via a 40-pin box header, directly installed into the system. IRQ and I/O addresses are automatically assigned by the BIOS, eliminating the need for manual jumper configuration. This simplifies installation and reduces error sources. Interface selection is done via DIP switches, allowing each port to be individually configured for RS-232, RS-422, or RS-485. The RS-485 interface supports both 2-wire and 4-wire topologies, offering flexibility in network configuration.

Compatibility and Accessories
The CB-114-T is compatible with operating systems such as Windows, Windows CE 5.0/6.0, and XP Embedded. For connecting to external devices, optional cables with DB9 or DB25 connectors are available. The maximum number of modules per system is eight, enabling scalability for larger applications.

Installation and Mounting
Installation involves inserting the module into a PC/104-Plus-compatible system. Automatic assignment of IRQ and I/O address by the BIOS reduces configuration effort. Mounting requires no additional tools, as the module is directly inserted into the bus socket.

Operational Advantages
The combination of high baud rate, FIFO buffering, and integrated flow control ensures reliable and efficient data transmission. Visual diagnostics via LED indicators simplify maintenance. Support for multiple serial standards in a single module reduces the number of required interface cards. The module is designed for use in environments with extreme temperatures, with a wide-temperature model available for the range of -40 to 85 °C. The 5-year warranty underscores the product's reliability.

General
Number of ports	4
Maximum baud rate	921,6 kbps
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2

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