General
Number of ports	4
FIFO buffer	128 Byte
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2
MTBF	403.631 Stunden

The CB-134I-T module from Moxa is an industrial-grade PC/104-Plus module for serial communication, specifically designed for use in demanding environments such as power supply, transportation, or manufacturing automation. It features four serial ports compliant with the RS-422/RS-485 standard and provides optical isolation of 2 kV, protecting it against electrical interference and voltage spikes. The operating temperature range of -40 to 85 °C makes the module suitable for use in extreme climatic conditions, for example in outdoor installations or in machines operating under high thermal stress.

Applications

The module is designed for use in embedded systems requiring a reliable serial interface. Typical application fields include industrial control systems, data acquisition systems, remote control systems in power supply, or communication solutions in transportation. The robust construction and high operating temperature enable use in environments where standard PC components would fail.

Functions and Features in Detail

Each of the four serial ports features a 128-byte FIFO buffer, which accelerates data transmission and prevents buffer overflow. The baud rate can be set up to 921.6 kbps, including support for non-standard transmission rates. Communication parameters such as data bits (5, 6, 7, 8), stop bits (1, 1.5, 2), and parity (None, Even, Odd, Space, Mark) are configurable. Flow control is handled via XON/XOFF or can be disabled. Interface selection is done via DIP switches, enabling flexible configuration without software changes.

Technology Explained Simply

The module operates via the PC/104-Plus bus (PCI) and connects through a 40-pin box header. IRQ and I/O addresses are automatically assigned by the BIOS, simplifying integration into existing systems. Power supply is via 5 VDC with a current draw of 153 mA. The Tx/Rx LEDs per port provide visual status indication and facilitate diagnosis of communication issues. The MTBF (Mean Time Between Failures) is 403,631 hours, indicating high reliability.

Compatibility and Accessories

The module is compatible with Windows, Linux, and UNIX and offers extensive driver support. It is certified according to EN 55032, EN 61000-6-2/-6-4 as well as IEC 61000-4-x, ensuring compliance with industrial EMC standards. Certification according to CISPR 32 and FCC Part 15B Class A ensures electromagnetic emission limits. The vibration test standard IEC 60068-2-6 confirms mechanical robustness. The module complies with environmental standards RoHS, CRoHS, and WEEE.

Mounting and Installation

The module is installed into a PC/104-Plus system and connected via the 40-pin box header. The maximum number of boards per PC is eight. Installation does not require manual assignment of IRQ or I/O addresses, as these are automatically assigned by the BIOS. Interface configuration is done via the DIP switches on the module.

Operational Advantages

The combination of high operating temperature, optical isolation, and comprehensive driver support makes the CB-134I-T a reliable solution for industrial applications. Automatic address assignment and visual status indication via LEDs reduce maintenance and troubleshooting time. The high MTBF and 5-year warranty underscore the longevity and reliability of the module.