Comprehensive Product Summary – Rayon Technology A102 PCIe 2-Port RS232 Industrial Card

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### 1. Product Overview

Product Name: PCIe 2-Port RS232 Industrial Card
Model: A102
Series: APCIe Series (Advanced PCI Express Serial Communication Cards)
Article Number: A102
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 A102 is a high-performance, industrial-grade PCI Express (PCIe) serial communication card designed to provide two independent RS232 serial ports for PC-based control and automation systems. It is part of Rayon’s APCIe series, which includes a range of multi-port serial communication cards supporting RS232, RS422, and RS485 interfaces. The A102 model specifically targets industrial control, instrumentation, and data acquisition applications requiring reliable, high-speed serial communication over PCIe.

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### 2. Key Features

- Dual RS232 Ports: Provides two independent RS232 serial communication ports per card.
- High-Speed Communication: Supports baud rates from 50 bps up to 115,200 bps per port.
- Advanced Controller: Built around the Moschip MCS9922 serial communication controller, ensuring compatibility and stable performance.
- PCI Express Interface: Fully compliant with PCI Express bus architecture, offering plug-and-play installation and automatic resource allocation by the PCI BIOS.
- Memory-Mapped I/O: Both I/O and memory mapping are automatically assigned by the PCI BIOS, simplifying configuration.
- DB9 Male Connectors: Each port is equipped with a standard DB9 male connector for direct connection to RS232 devices.
- Industrial-Grade Design: Engineered for industrial environments with extended temperature and humidity tolerance.
- Cross-Platform Support: Compatible with multiple operating systems including Windows 2000, XP, Vista, Windows 7, and Linux.
- Low-Profile Option: Optional low-profile bracket available for compact or embedded systems.
- Upgradeable Family: Part of a modular product line allowing easy upgrade to isolated or multi-interface models (e.g., A102I, A112, A132).
- Plug & Play Configuration: No manual IRQ or address setting required; all resources are assigned automatically by the system BIOS.
- Reliable Data Handling: Incorporates 128-byte transmit and receive buffers per port to reduce CPU interrupts and improve throughput.
- Industrial Control Ready: Designed for use in automation, process control, and data logging systems.

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### 3. Technical Specifications

Controller Chip: Moschip MCS9922 (PCIe-to-Dual-Serial Controller)
Bus Interface: PCI Express (x1 slot compatible)
Number of Ports: 2 independent RS232 ports
Connector Type: DB9 male connectors (x2)
Baud Rate Range: 50 bps to 115,200 bps (software programmable)
Flow Control: Supports hardware (RTS/CTS) and software (Xon/Xoff) flow control
Interrupt Control: Plug & Play, assigned by PCI BIOS
I/O Mapping: Assigned by PCI BIOS
Memory Mapping: Assigned by PCI BIOS
IRQ Mapping: Two IRQs assigned by PCI BIOS

Physical Dimensions:
- Card size: 75 mm (W) × 90 mm (L)
- Standard PCIe bracket (low-profile bracket optional)

Environmental Conditions:
- 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)

Material & Build:
- PCB: Industrial-grade multilayer board
- Connectors: Nickel-plated DB9 male connectors
- Bracket: Stainless steel, standard or low-profile form factor

Power Requirements:
- Supplied via PCIe bus (no external power required)

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### 4. Functionality

The A102 card functions as a dual-port RS232 communication interface for systems equipped with PCI Express slots. Each port operates independently, allowing simultaneous communication with two serial devices. The Moschip MCS9922 controller manages data transmission and reception, providing efficient buffering and interrupt handling to minimize CPU load.

Typical Use Cases:
- Industrial automation and process control systems
- SCADA (Supervisory Control and Data Acquisition) applications
- Data acquisition and instrumentation
- Serial device networking (PLC, sensors, barcode scanners, etc.)
- POS (Point of Sale) and kiosk systems
- Embedded control systems requiring reliable serial communication

Compatibility:
- Fully compatible with standard RS232 devices
- Works with Windows 2000, XP, Vista, Windows 7, and Linux distributions
- Supports both 32-bit and 64-bit operating systems
- Compatible with PC/AT systems equipped with PCIe expansion slots

Operation:
- Upon installation, the PCI BIOS automatically detects the card and assigns I/O addresses, memory space, and IRQs.
- The driver (based on Moschip MCS9922) creates virtual COM ports accessible by standard serial communication software.
- Each port can be configured for baud rate, parity, stop bits, and flow control through the operating system’s device manager or terminal software.

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### 5. Components & Accessories

Included Items:
- A102 PCIe 2-Port RS232 Card
- Standard PCIe mounting bracket
- Driver CD (Windows and Linux drivers)
- User manual and installation guide

Optional Accessories:
- Low-profile bracket for compact PC enclosures
- RS232 extension cables (DB9 male-to-female)
- RS232 loopback test connector (for diagnostics)
- RS4232 isolated box (for ground isolation and RS422/RS485 conversion)

Connectors:
- Two DB9 male connectors on the card edge
- Pin assignments follow standard RS232 configuration:
- Pin 1: DCD
- Pin 2: RXD
- Pin 3: TXD
- Pin 4: DTR
- Pin 5: GND
- Pin 6: DSR
- Pin 7: RTS
- Pin 8: CTS
- Pin 9: RI

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### 6. Installation & Setup

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

Installation Procedure:
1. Power off the host system.
2. Insert the A102 card into an available PCIe slot.
3. Secure the card using the bracket screw.
4. Power on the system.
5. The operating system’s Plug & Play function will detect the new hardware.
6. Install the appropriate driver from the provided CD or download from Rayon’s website.
7. Verify installation in the Device Manager (Windows) or via `/dev/tty` device nodes (Linux).

Driver Installation:
- Windows:
- The system identifies the card as “PCIe to High Speed Serial Port.”
- Use the Moschip MCS9922 driver (located in `\PCIe_Card\APCIe\Win32`).
- After installation, new COM ports appear in the system.
- Linux:
- Extract the driver package to `/etc/rayone`.
- Run the installation script (`./Install.redhat`).
- Rebuild the kernel module and reboot.
- Device nodes `/dev/tty21a` and `/dev/tty21b` correspond to ports A and B.

Mounting Options:
- Standard PCIe bracket for desktop PCs
- Optional low-profile bracket for compact or embedded systems

Configuration:
- All resource assignments (I/O, memory, IRQ) are handled automatically by the PCI BIOS.
- Baud rate, parity, and flow control are configured through software.

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### 7. Performance & Capabilities

Data Throughput:
- Supports up to 115.2 Kbps per port (software programmable)
- 128-byte transmit and receive FIFO buffers per channel

Efficiency:
- Reduced CPU load due to buffered communication and interrupt optimization
- Supports simultaneous full-duplex communication on both ports

Latency & Reliability:
- Low interrupt latency due to PCIe architecture
- Stable operation under continuous data transmission

Limitations:
- RS232 interface only (no RS422/RS485 support on this model)
- Non-isolated ports (for isolated version, use A102I)
- Maximum baud rate limited to 115.2 Kbps (higher speeds available on other models)

Performance Enhancements (Series Comparison):
- A102I: Adds ground isolation for RS232 ports
- A132: Provides RS422/RS485 support
- A112: Offers selectable RS232/RS422/RS485 per port
- A104/A114/A134: Four-port variants for higher density applications
- A168/A138/A118: Eight-port versions for large-scale serial networking

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### 8. Standards & Compliance

Bus Standard: PCI Express (PCIe)
Serial Interface Standard: EIA/TIA RS232C
Controller Compliance: Moschip MCS9922 chipset
Operating System Support:
- Windows 2000, XP, 2003, Vista, Windows 7
- Linux kernel 2.6.x and later (RedHat, Fedora, SUSE, Slackware)
Plug & Play: Fully compliant with PCI BIOS resource allocation
Flow Control Standards: RTS/CTS and Xon/Xoff supported
Environmental Compliance: Designed for industrial operating conditions
EMC/ESD: Built to meet industrial electromagnetic compatibility standards (manufacturer internal compliance)

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### 9. Additional Information

Warranty:
- One-year limited warranty covering defects in materials and workmanship.
- Excludes damage from misuse, unauthorized servicing, or electrical faults.

Support & Maintenance:
- Technical support available via email (rayon@ms1.hinet.net).
- Driver updates and documentation downloadable from Rayon’s website.
- RMA (Return Material Authorization) required for repairs.

Repair Procedure:
- Contact Rayon for RMA number before returning products.
- Provide model number, serial number, and problem description.
- Warranty repairs are free of charge; out-of-warranty repairs incur a flat-rate service fee.

Maintenance:
- No periodic maintenance required.
- Keep connectors clean and free from dust.
- Avoid inserting/removing the card while the system is powered on.

Upgrade Path:
The A102 is part of a scalable product family. Users can upgrade to models with additional ports, isolation, or multi-protocol support without changing the driver base or software interface.

Related Models:
| Model | Ports | Interface Type | Isolation | Description |
|--------|--------|----------------|------------|--------------|
| A102 | 2 | RS232 | No | Base model |
| A102I | 2 | RS232 | Yes | Isolated RS232 |
| A132 | 2 | RS422/RS485 | No | Differential signaling |
| A112 | 2 | RS232/RS422/RS485 | No | Multi-interface |
| A104 | 4 | RS232 | No | Four-port RS232 |
| A134 | 4 | RS422/RS485 | No | Four-port differential |
| A114 | 4 | RS232/RS422/RS485 | No | Four-port multi-interface |
| A168 | 8 | RS232 | No | Eight-port RS232 |
| A138 | 8 | RS422/RS485 | No | Eight-port differential |
| A118 | 8 | RS232/RS422/RS485 | No | Eight-port multi-interface |

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### Summary

The Rayon A102 PCIe 2-Port RS232 Industrial Card is a robust, cost-effective solution for adding dual RS232 serial ports to modern PCI Express-based systems. Designed for industrial and embedded applications, it combines reliable Moschip MCS9922 hardware with broad OS compatibility and plug-and-play installation. Its compact 75×90 mm form factor, optional low-profile bracket, and industrial operating range make it suitable for control systems, automation, and data communication environments where stability and compatibility are critical.

With automatic resource allocation, buffered communication, and support for standard RS232 signaling, the A102 ensures dependable serial connectivity for legacy and modern devices alike. For users requiring isolation, higher port density, or multi-protocol support, the A102 serves as the foundation within Rayon’s scalable APCIe product family.