Comprehensive Product Summary – Rayon Technology A132 PCIe 2-Port RS422/485 Card

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### 1. Product Overview

Product Name: PCIe 2-Port RS422/485 Card
Model: A132
Series: APCIe Advanced PCIe Serial Communication Card Series
Article Number: A132
Manufacturer: Rayon Technology Co., Ltd.
Manufacturer Address: 2F, No. 177, Chung Shan 2 Rd., Lu Chou City, Taipei Hsien, Taiwan
Contact:
- Tel: +886-2-82858362
- Fax: +886-2-82857065
- Email: rayon@ms1.hinet.net
- Web: [www.rayontech.com](http://www.rayontech.com)

The Rayon A132 is a high-performance, dual-port serial communication card designed for PCI Express (PCIe) bus systems. It provides two independent RS422/RS485 serial ports, each configurable via DIP switches, and is optimized for industrial control, automation, and data communication applications. The A132 belongs to Rayon’s APCIe series, which includes a range of multi-port serial interface cards supporting RS232, RS422, and RS485 standards.

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### 2. Key Features

- Dual-Port Serial Interface: Two independent serial ports supporting RS422 or RS485 communication standards.
- Selectable Interface Mode: Each port can be configured individually as RS422 or RS485 using onboard DIP switches.
- High Compatibility: Fully compatible with PCI Express bus architecture; plug-and-play installation with automatic resource assignment by PCI BIOS.
- ADDC (Auto Data Direction Control): Built-in ADDC feature for RS485 mode ensures automatic control of data direction, eliminating the need for manual RTS signal management.
- Industrial-Grade Design: Engineered for industrial control systems requiring reliable, noise-resistant serial communication.
- Wide OS Support: Compatible with Windows 2000, XP, Vista, Windows 7, and Linux operating systems.
- Flexible Mounting: Standard PCIe bracket included; low-profile bracket available upon request for compact systems.
- High-Speed Communication: Supports baud rates from 50 bps up to 115,200 bps per port.
- DB9 Male Connectors: Each port uses a standard DB9 male connector for easy integration with existing serial devices.
- Plug & Play Resource Allocation: I/O mapping, memory mapping, and IRQ assignments are automatically handled by the PCI BIOS.
- Compact Form Factor: Small PCB footprint (75 × 90 mm) suitable for space-constrained systems.
- Reliable Operation: Designed for continuous operation in industrial environments with wide temperature and humidity tolerance.

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### 3. Technical Specifications

Hardware Controller: Moschip MCS9922 (PCIe-to-Serial Controller)
Bus Interface: PCI Express (PCIe) x1 slot compatible
Number of Ports: 2 independent serial ports
Interface Standards: RS422 / RS485 (selectable per port)
Baud Rate: 50 to 115,200 bps (software programmable)
Flow Control: Xon/Xoff (software) or RTS/CTS (hardware)
Connector Type: Two DB9 male connectors
Dimensions: 75 mm (W) × 90 mm (L)
Bracket Type: Standard PCIe bracket (low-profile optional)
I/O Mapping: Assigned automatically by PCI BIOS
Memory Mapping: Assigned automatically by PCI BIOS
IRQ Mapping: Two IRQs assigned automatically by PCI BIOS
Operating Temperature: 0°C to 55°C
Storage Temperature: 0°C to 65°C
Operating Humidity: 10% to 95% RH (non-condensing)
Storage Humidity: 5% to 95% RH (non-condensing)
PCB Material: Industrial-grade FR4 PCB
Power Source: Supplied via PCIe bus (no external power required)

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### 4. Functionality

The A132 card provides two serial communication channels that can operate in either RS422 or RS485 mode. Each port’s mode is configured via DIP switches located on the card.

- RS422 Mode: Supports full-duplex differential signaling for point-to-point or multi-drop communication. Ideal for long-distance, high-speed data transmission with noise immunity.
- RS485 Mode: Supports half-duplex differential signaling for multi-drop networks. The ADDC feature automatically manages data direction, simplifying communication setup.

Use Cases and Applications:
- Industrial automation and process control systems
- Data acquisition and SCADA systems
- Machine-to-machine (M2M) communication
- Embedded control systems
- Serial device networking (PLC, sensors, controllers)
- Communication with RS422/RS485-based instruments and terminals

Compatibility:
- Compatible with standard PCIe slots on desktop PCs, industrial PCs, and embedded systems.
- Works with major operating systems including Windows 2000/XP/Vista/7 and Linux distributions (Red Hat, SUSE, Slackware, Fedora).

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### 5. Components & Accessories

Included Items:
- A132 PCIe 2-Port RS422/RS485 Card
- Standard PCIe bracket (pre-installed)
- Driver and utility software (on CD or downloadable)
- User manual and installation guide

Optional Accessories:
- Low-profile bracket: For installation in compact or small-form-factor PCs.
- TB485 converter: DB9-to-terminal block adapter for RS485 wiring (DATA+, DATA–, GND).
- RS4232-8 or RS4232-4 Isolated Box: Optional external isolation box for enhanced electrical isolation and signal conversion.
- Expansion cables: DB9 or DB25 cables for connecting to external devices.

Connectors:
- Two DB9 male connectors on the card.
- Pin assignments follow standard RS422/RS485 definitions:
- Pin 2: RXD+
- Pin 3: TXD+
- Pin 4: TXD–
- Pin 5: GND
- Pin 6: RXD–

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### 6. Installation & Setup

System Requirements:
- Available PCI Express slot (x1 or higher)
- Supported operating system (Windows 2000/XP/Vista/7 or Linux)
- Administrator privileges for driver installation

Installation Procedure:
1. Power off the computer and unplug it from the power source.
2. Insert the A132 card into an available PCIe slot.
3. Secure the card with the bracket screw.
4. Reconnect power and boot the system.
5. The PCI BIOS automatically detects the card and assigns I/O, memory, and IRQ resources.
6. Install the appropriate driver for your operating system:
- Windows: Use the MOSCHIP MCS9922 driver provided on the CD or from Rayon’s website.
- Linux: Install the driver package via terminal commands (`./Install.redhat` or equivalent).
7. Configure the DIP switches to select RS422 or RS485 mode for each port.
8. Connect serial devices using DB9 cables or terminal adapters.

Configuration Notes:
- DIP switch bit 3 controls Port A; bit 4 controls Port B.
- OFF position: RS485 mode (default).
- ON position: RS422 mode.
- For RS485 mode, short DB9 pins 2 & 3 (DATA+) and pins 4 & 6 (DATA–) if required.

Caution:
Do not insert or remove the card while the system is powered on.

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### 7. Performance & Capabilities

Data Throughput:
- Supports baud rates from 50 bps to 115.2 kbps per port.
- Each port includes a 128-byte transmit and receive FIFO buffer (via MCS9922 controller).

Efficiency:
- Reduces CPU load by buffering data and minimizing interrupt frequency.
- Plug-and-play resource allocation ensures optimal system performance.

Capacity:
- Two independent serial channels per card.
- Multiple A132 cards can be installed in one system (up to four cards supported under Linux).

Limitations:
- RS485 mode operates in half-duplex; only one transmitter active at a time.
- No galvanic isolation (for isolation, use A132I model).
- Maximum baud rate limited to 115.2 kbps (for higher speeds, use advanced models like A134 or A138).

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### 8. Standards & Compliance

Bus Standard: PCI Express (PCIe)
Serial Standards: EIA/TIA RS422 and RS485
Controller Compliance: MOSCHIP MCS9922 compatible
Plug & Play: Fully compliant with PCI BIOS resource assignment
Operating System Drivers:
- Windows 2000, XP, 2003, Vista, 7
- Linux kernel 2.6.x and later (Red Hat, SUSE, Slackware, Fedora)
Regulatory Compliance:
- CE and FCC Class B (typical for industrial communication cards)
- RoHS compliant (lead-free manufacturing)
Industry Standards:
- EIA/TIA-422-B
- EIA/TIA-485-A
- PCI Express Base Specification 1.1

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### 9. Additional Information

Warranty:
- One-year limited hardware warranty covering defects in materials and workmanship.
- Warranty excludes damage from misuse, electrical surges, or unauthorized modifications.

Support & Maintenance:
- Technical support available via email (rayon@ms1.hinet.net).
- Driver updates and documentation downloadable from [www.rayontech.com](http://www.rayontech.com).
- RMA (Return Material Authorization) required for repairs.

Repair Procedure:
1. Contact Rayon support with model number, serial number, and problem description.
2. Obtain an RMA number before returning the product.
3. Products under warranty repaired free of charge; out-of-warranty repairs subject to flat-rate service fee.

Related Models in APCIe Series:
- A102: 2-Port RS232
- A112: 2-Port RS232/RS422/RS485
- A132I: 2-Port Ground-Isolated RS422/RS485
- A104: 4-Port RS232
- A134: 4-Port RS422/RS485
- A114: 4-Port RS232/RS422/RS485
- A168: 8-Port RS232
- A138: 8-Port RS422/RS485
- A118: 8-Port RS232/RS422/RS485

Upgrade Options:
Users requiring galvanic isolation or additional ports can upgrade to A132I (isolated version) or A134/A138 (4- or 8-port versions).

Maintenance Tips:
- Keep the PCIe contacts clean and free of dust.
- Avoid hot-swapping the card.
- Ensure proper grounding in RS485 networks to prevent signal interference.

Software Utilities:
- RAYMON.EXE: Terminal emulation utility for testing COM ports and verifying data transmission.
- Linux Driver Tools: Installation scripts and configuration utilities located in `/etc/rayone`.

Driver Identification:
- Vendor ID: 9710
- Device ID: 9922 (for 2-port cards)

Troubleshooting Highlights:
- If the card is not detected, verify PCIe slot functionality and clean contacts.
- If COM ports do not appear, reinstall the correct driver for your OS.
- For communication issues, check DIP switch settings and cable wiring.

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### Summary

The Rayon A132 PCIe 2-Port RS422/485 Card is a robust, industrial-grade communication interface designed for systems requiring reliable serial connectivity over PCI Express. With dual configurable ports, support for both RS422 and RS485 standards, and compatibility across major operating systems, it provides a flexible and efficient solution for industrial automation, instrumentation, and data communication applications.

Its compact design, plug-and-play installation, and automatic resource management make it ideal for embedded and industrial PC environments. The A132’s use of the Moschip MCS9922 controller ensures stable performance, efficient data handling, and broad driver support.

For users needing electrical isolation or additional ports, Rayon offers compatible models within the same APCIe family, ensuring scalability and consistent performance across diverse industrial communication requirements.