General
Number of ports	2 Stück
Insulation	2 kV optisch
Data bits	5, 6, 7, 8 -
Stop bits	1, 1.5, 2 -
MTBF	536.288 Stunden (Telcordia SR-332)

The CA-132I from Moxa is an industrial 2-port RS-422/485 PC/104 module designed for serial communication in industrial environments. It features optical isolation of 2 kV, ensuring electrical separation between the module and connected devices, thus providing EMI protection and protection against voltage spikes. The module is designed for applications requiring stable and reliable serial data transmission, such as in automation technology, power supply, or traffic control. The operating temperature ranges from 0 to 55 °C, making it suitable for use in environments with moderate ambient temperatures.

Applications
This module is suitable for industrial systems requiring serial interfaces for communication with sensors, actuators, control devices, or other peripheral devices. Typical application scenarios include decentralized control systems, monitoring systems, or industrial networks where RS-422 or RS-485 are standard for serial data transmission. Support for RS-422 (4-wire) and RS-485 (2- and 4-wire) enables flexible connection to various device configurations. Integrated Tx/Rx LEDs per port facilitate diagnosis and status monitoring of communication.

Functions and Features in Detail
The CA-132I is based on two 16C550C-compatible UARTs, enabling high data transfer rates. Baud rates can be set from 50 bps to 921.6 kbps, allowing adaptation to different speed requirements of connected devices. Configuration is done via DIP switches, which select the I/O base address and interrupt. Data transmission occurs with a FIFO buffer size of 64 bytes per port, enhancing data processing efficiency. Supported data bits range from 5 to 8, stop bits 1, 1.5, or 2, and parity types include None, Even, Odd, Space, and Mark. Flow control can be managed via XON/XOFF.

Technology Explained Simply
The 2 kV optical isolation protects the module and connected devices from electrical disturbances and potential differences, which are common in industrial applications. The use of RS-422 and RS-485 enables robust, stable data transmission over long distances, resistant to interference. The PC/104 bus architecture allows integration into compact, modular systems often used in industrial control applications. Power supply is via 5 VDC with a current draw of 190 mA, facilitating integration into existing 5-V systems.

Compatibility and Accessories
The module is compatible with a wide range of operating systems, including Windows (DOS to Windows 10/Server 2019, x86/x64, CE 5.0/6.0, XP Embedded), Linux (Kernel 2.4.x, 2.6.x), and UNIX (FreeBSD 4.x, QNX 4, SCO UNIX, OpenServer). Driver support for these platforms enables easy integration into existing system environments. Shared IRQs (3, 4, 5, 6, 7, 9, 10, 11, 12, 15) offer flexibility in interrupt assignment. The connection type is a 20-pin box header, designed for mounting in PC/104 systems.

Installation and Mounting
The module is installed into a PC/104 system via the 20-pin box header. Configuration is performed using DIP switches to set the I/O base address and interrupt. Power supply is via 5 VDC with a current draw of 190 mA. Dimensions are 90 x 96 mm, enabling integration into compact systems. Mounting requires no additional tools or components, as the module is directly inserted into the system.

Operational Advantages
The optical isolation and EMI certifications (EN 55032/24, CISPR 32, FCC Part 15B Class A, IEC 61000-4-2/-3/-4/-5/-6/-8) ensure high operational safety in electromagnetically noisy environments. The MTBF is 536,288 hours (Telcordia SR-332), indicating high reliability. Integrated LEDs allow for quick diagnosis of communication issues. Support for multiple operating systems and flexible configuration via DIP switches enhance the module’s adaptability to various application scenarios. Environmental declarations include RoHS, CRoHS, and WEEE, confirming compliance with environmental regulations. The warranty period is 5 years.

Certifications and Environmental Conditions
The module meets EMI requirements according to EN 55032/24, CISPR 32, and FCC Part 15B Class A. EMS certifications include IEC 61000-4-2/-3/-4/-5/-6/-8, confirming robustness against electromagnetic interference. Environmental tests according to IEC 60068-2-1/-2/-3/-14 and vibration tests according to IEC 60068-2-6 ensure functionality under industrial conditions. Storage temperature ranges from -40 to 85 °C, with humidity from 5 to 95 %, non-condensing. The operating temperature is limited to 0 to 55 °C.

Mechanical and Electrical Properties
The module has mechanical dimensions of 90 x 96 mm and connects via a 20-pin box header. Power supply is via 5 VDC with a current draw of 190 mA. Optical isolation is 2 kV, ensuring safe separation between the module and connected devices. Signals for RS-422 (Tx±, Rx±, GND), RS-485 4-wire (Tx±, Rx±, GND), and RS-485 2-wire (Data±, GND) are clearly defined. The FIFO buffer size is 64 bytes per port, optimizing data processing efficiency.

Operating System Support
Driver support includes Windows (DOS to Windows 10/Server 2019, x86/x64, CE 5.0/6.0, XP Embedded), Linux (Kernel 2.4.x, 2.6.x), and UNIX (FreeBSD 4.x, QNX 4, SCO UNIX, OpenServer). Shared IRQs (3, 4, 5, 6, 7, 9, 10, 11, 12, 15) allow flexible interrupt assignment. Configuration via DIP switches provides flexibility in setting the I/O base address and interrupt.