Moxa CA-114-T , 4-port PC-104 content_copy

The CA-114-T is an industrial serial 4-port module from Moxa, designed for use in embedded systems and industrial controls. It is a PC/104 card featuring four configurable serial interfaces, which can be operated as RS-232, RS-422, or RS-485 as required. Configuration is performed via DIP switches, which also set the I/O base address and interrupt vector. The card is designed for operation at extreme temperatures from -40 to 85 °C, making it suitable for demanding industrial environments.

Applications
This module is suitable for applications requiring reliable serial communication in compact, modular systems. Typical use cases include industrial automation systems, machine controls, data acquisition systems, and embedded computers expanded via the PC/104 bus. Its high temperature resistance and robust construction make it particularly suitable for mobile or harsh environments.

Functions and Features in Detail
Each of the four ports is based on a 16C550C-compatible UART with a 64-byte FIFO, enabling stable and loss-free data transmission at high baud rates. The maximum baud rate is 921.6 kbps. The interfaces support various data formats: data bits 5, 6, 7, or 8, stop bits 1, 1.5, or 2, and parity types None, Even, Odd, Space, and Mark. Flow control can be selected between None, RTS/CTS, and XON/XOFF. Integrated Tx/Rx LEDs per port facilitate visual diagnosis of data flow.

Technology Explained Simply
The card uses the PC/104 bus, a compact, modular bus standard for embedded systems that enables a stackable architecture. The interfaces are connected via a 40-pin box header, allowing flexible integration into existing systems. The DIP switches enable hardware-based configuration without requiring software changes. Power supply is via 5 VDC, with the card consuming 305 mA.

Compatibility and Accessories
The card supports a wide range of operating systems, including Windows (from DOS to Windows 10/Server 2019, x86/x64, CE 5.0/6.0, XP Embedded) as well as Linux kernel versions 2.4.x and 2.6.x. Driver support enables easy integration into existing system environments. IRQs 3, 4, 5, 6, 7, 9, 10, 11, 12, and 15 are shared, increasing flexibility during system configuration.

Mounting and Installation
Mounting is performed in PC/104-compatible systems, with the card connected via the 40-pin box header. Interface configuration, I/O address, and IRQ are set using the DIP switches on the board. No additional tools or software installations are required to integrate the card into an existing system.

Operational Advantages
The card is characterised by high reliability and long service life, with an MTBF of 630,997 hours (according to Telcordia SR-332). Environmental resistance, including high temperature tolerance and certifications according to EN 55032/24, CISPR 32, FCC Part 15B Class A, as well as IEC 61000-4-2/-3/-4/-5/-6/-8, ensures stable operation in demanding environments. Certifications according to IEC 60068-2-1/-2/-3/-14 and IEC 60068-2-6 confirm resistance to temperature changes, humidity, shock, and vibration. The environmental declaration includes RoHS, CRoHS, and WEEE, confirming compliance with European environmental regulations. The warranty is 5 years.

Dimensions and Mechanical Properties
The card measures 90 x 96 mm, making it suitable for compact systems. The mechanical design is intended for industrial environments, with an operating temperature range of -40 to 85 °C and the same storage temperature range. Humidity is 5 to 95 % (non-condensing).

General
Data bits	5, 6, 7, 8
Stop bits	1, 1.5, 2
MTBF	630.997 Stunden (Telcordia SR-332)

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