Comprehensive Product Summary – Rayon Technology A102‑I PCIe Isolated 2‑Port RS‑232 Card

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### 1. Product Overview

Product Name: PCIe Isolated 2‑Port RS‑232 Card
Model: A102‑I
Series: APCIe Advanced PCI Express Serial Communication Card Series
Article Number: A102‑I
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‑I is a high‑performance, industrial‑grade PCI Express (PCIe) serial communication card designed to provide two fully ground‑isolated RS‑232 ports. It is part of Rayon’s APCIe family of advanced serial interface cards, engineered for robust, noise‑immune communication in industrial control, automation, and embedded computing environments.

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### 2. Key Features

- Dual Isolated RS‑232 Ports: Two independent RS‑232 serial channels, each with galvanic ground isolation to prevent ground loops and electrical interference between connected devices.
- PCI Express Interface: Fully compliant with PCIe bus architecture, supporting plug‑and‑play installation and automatic resource assignment (I/O, memory, IRQ) by the system BIOS.
- High‑Performance Controller: Built around the Moschip MCS9922 serial communication controller, compatible with 16950A UART architecture, providing advanced buffering and flow control.
- Wide Baud Rate Range: Each port supports programmable baud rates from 50 bps up to 115,200 bps, suitable for a wide range of serial devices.
- DB9 Male Connectors: Standard 9‑pin male D‑sub connectors for direct connection to RS‑232 equipment.
- Ground Isolation: Electrical isolation between ports and host system ensures reliable operation in electrically noisy or multi‑ground environments.
- Operating System Support: Compatible with Windows 2000, XP, 2003, Vista, Windows 7, and Linux distributions (Red Hat, SUSE, Slackware, Fedora Core).
- Compact Form Factor: Standard PCIe card dimensions with optional low‑profile bracket for small form factor PCs.
- Industrial Reliability: Designed for continuous operation in industrial temperature and humidity ranges.
- Plug & Play Configuration: Automatic detection and configuration by PCI BIOS; no manual jumper settings required.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Bus Interface | PCI Express (PCIe) |
| Controller IC | Moschip MCS9922 (16950A compatible) |
| Number of Ports | 2 |
| Interface Type | Ground‑Isolated RS‑232 |
| Baud Rate Range | 50 to 115,200 bps (software programmable) |
| Connector Type | 2 × DB9 male |
| Dimensions | 100 mm × 97 mm |
| Bracket Type | Standard PCIe bracket (low‑profile optional) |
| I/O Mapping | Assigned by PCI BIOS |
| Memory Mapping | Assigned by PCI BIOS |
| IRQ Mapping | Assigned 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 |
| Isolation Type | Electrical ground isolation per port |
| Material | Multi‑layer PCB with industrial‑grade components |
| Power Source | Supplied via PCIe bus |
| Compliance | PCI Express Base Specification compatible |

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### 4. Functionality

The A102‑I provides two independent RS‑232 serial communication channels through the PCIe bus. Each port operates as a standard asynchronous serial interface, supporting full‑duplex data transmission. The Moschip MCS9922 controller integrates dual UARTs with 128‑byte transmit and receive FIFOs, minimizing CPU interrupts and improving throughput.

Operation Principle:
- The card is inserted into a PCIe slot.
- Upon system boot, the PCI BIOS automatically assigns I/O addresses, memory space, and IRQs.
- The operating system detects the card as a new serial device and loads the appropriate driver.
- Each port appears as a standard COM port (Windows) or /dev/tty2xx device (Linux).

Use Cases and Applications:
- Industrial automation and control systems
- Data acquisition and instrumentation
- SCADA and PLC communication
- Serial device networking (sensors, meters, barcode readers)
- Embedded systems requiring isolated serial interfaces
- Laboratory and test equipment integration

Compatibility:
- Fully compatible with standard RS‑232 devices (DTE/DCE).
- Supports hardware (RTS/CTS) and software (XON/XOFF) flow control.
- Compatible with other Rayon APCIe series cards for multi‑port expansion.

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### 5. Components & Accessories

Included Items:
- A102‑I PCIe card (2‑port isolated RS‑232)
- Standard PCIe mounting bracket
- Driver and utility software (Windows and Linux)
- User manual and installation guide

Optional Accessories:
- Low‑profile bracket for compact PC chassis
- RS‑232 extension cables (DB9 male to DB9 female)
- RS‑232 isolated converter boxes (e.g., RS4232‑4 or RS4232‑8 for extended isolation)

Connectors:
- Two DB9 male connectors on the card edge
- Pin assignments follow standard RS‑232 convention:
- Pin 1: DCD (Data Carrier Detect)
- Pin 2: RXD (Receive Data)
- Pin 3: TXD (Transmit Data)
- Pin 4: DTR (Data Terminal Ready)
- Pin 5: GND (Isolated Ground)
- Pin 6: DSR (Data Set Ready)
- Pin 7: RTS (Request to Send)
- Pin 8: CTS (Clear to Send)
- Pin 9: RI (Ring Indicator, not supported on isolated models)

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### 6. Installation & Setup

System Requirements:
- Available PCI Express slot (x1 or higher)
- Compatible operating system (Windows 2000/XP/2003/Vista/7 or Linux kernel 2.6.x and above)

Installation Procedure:
1. Power off the host system.
2. Insert the A102‑I card into an available PCIe slot.
3. Secure the bracket to the chassis.
4. Power on the system.
5. The BIOS automatically detects the card and assigns resources.
6. Install the appropriate driver:
- Windows: Use the Moschip MCS9922 driver (available on CD or from Rayon).
- Linux: Install via provided script (`Install.redhat` or equivalent) under `/etc/rayone`.
7. Verify installation:
- Windows: Check “Device Manager” → “Ports (COM & LPT)” for new COM ports.
- Linux: Verify new devices `/dev/tty21a` and `/dev/tty21b`.

Configuration:
- Baud rate, parity, stop bits, and flow control are configured via software.
- No DIP switches or jumpers are required.
- For Linux, driver supports up to four cards simultaneously (up to eight ports total).

Mounting Options:
- Standard PCIe bracket for desktop or industrial PC.
- Optional low‑profile bracket for 2U or embedded systems.

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

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### 7. Performance & Capabilities

- Data Throughput: Up to 115.2 kbps per port (standard RS‑232 limit).
- Buffering: 128‑byte transmit and receive FIFOs per port reduce CPU load and prevent data loss.
- Interrupt Handling: Shared IRQs supported; automatically assigned by BIOS.
- Isolation: Each port is galvanically isolated from the host system ground, protecting against voltage differences and noise.
- Latency: Low interrupt latency due to PCIe architecture and buffered UART design.
- Reliability: Continuous 24/7 operation supported under industrial conditions.
- Limitations:
- RS‑232 only (no RS‑422/485 support).
- Maximum cable length limited by RS‑232 standard (typically 15 m at 19.2 kbps).
- No hardware DIP switch configuration (software‑only setup).

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### 8. Standards & Compliance

- Bus Interface: PCI Express Base Specification compliant.
- Serial Interface: EIA/TIA‑232‑E (RS‑232) standard compliant.
- Controller Compliance: Moschip MCS9922 UART compatible with 16C950/16950A.
- Operating System Drivers:
- Windows 2000/XP/2003/Vista/7 (Plug & Play)
- Linux kernel 2.6.x and later (Red Hat, SUSE, Slackware, Fedora)
- Environmental Standards: Designed for industrial temperature and humidity ranges.
- Electrical Isolation: Meets industrial isolation requirements for ground separation.
- RoHS Compliance: Manufactured with lead‑free components (where applicable).

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### 9. Additional Information

Warranty:
- One‑year limited hardware warranty covering defects in materials and workmanship.
- Warranty excludes damage due to misuse, electrical surges, or unauthorized modification.

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.
- Out‑of‑warranty repairs available at flat‑rate service charge.

Maintenance Recommendations:
- Keep card contacts clean and free of dust.
- Ensure proper grounding of host system.
- Avoid hot‑swapping or insertion under power.

Driver Updates:
- Windows drivers based on Moschip reference design.
- Linux drivers maintained under `/etc/rayone` directory; support up to four cards concurrently.
- Regular updates provided for new kernel versions.

Related Products in the APCIe Series:
| Model | Ports | Interface Type | Isolation |
|------------|------------|--------------------|----------------|
| A102 | 2 × RS‑232 | Non‑isolated | No |
| A102‑I | 2 × RS‑232 | Ground‑Isolated | Yes |
| A132 | 2 × RS‑422/485 | Non‑isolated | No |
| A132‑I | 2 × RS‑422/485 | Ground‑Isolated | Yes |
| A112 | 2 × RS‑232/422/485 | Non‑isolated | No |
| A112‑I | 2 × RS‑232/422/485 | Ground‑Isolated | Yes |
| A104 | 4 × RS‑232 | Non‑isolated | No |
| A134 | 4 × RS‑422/485 | Non‑isolated | No |
| A134‑I | 4 × RS‑422/485 | Ground‑Isolated | Yes |
| A114 | 4 × RS‑232/422/485 | Non‑isolated | No |
| A124‑I | 2 × RS‑232 + 2 × RS‑422/485 | Partially Isolated | Yes |
| A168 | 8 × RS‑232 | Non‑isolated | No |
| A138 | 8 × RS‑422/485 | Non‑isolated | No |
| A118 | 8 × RS‑232/422/485 | Non‑isolated | No |

Complementary Products:
- RS4232‑4 / RS4232‑8 Isolated Boxes: External isolation modules for RS‑232/422/485 conversion.
- TWIN232 / TWIN485 Converters: Industrial ground‑isolated RS‑232 to RS‑232/422/485 converters.
- UTS004 / UTS485 USB Serial Boxes: USB‑to‑serial converters with isolated RS‑422/485 ports.
- S432io Serial Port Sharer: One‑to‑three serial distribution device with isolation.

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### Summary

The Rayon A102‑I PCIe Isolated 2‑Port RS‑232 Card is a robust, industrial‑grade communication interface designed for systems requiring reliable, noise‑immune serial connectivity. Its dual isolated RS‑232 ports, powered by the Moschip MCS9922 controller, deliver stable and efficient data transfer with minimal CPU overhead. The card’s PCIe interface ensures high bandwidth and plug‑and‑play configuration, while its compatibility with multiple operating systems makes it suitable for diverse industrial and embedded applications.

With its compact design, optional low‑profile bracket, and comprehensive driver support, the A102‑I provides a dependable solution for engineers integrating serial communication into modern PCIe‑based systems. Its electrical isolation safeguards both host and peripheral devices, ensuring long‑term reliability in demanding environments such as factory automation, process control, and instrumentation networks.

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Manufacturer: Rayon Technology Co., Ltd.
Model: A102‑I
Product Type: PCIe Isolated 2‑Port RS‑232 Card
Key Attributes: Dual isolated RS‑232 ports, Moschip MCS9922 controller, PCIe interface, industrial reliability, Windows/Linux support.
Applications: Industrial control, automation, data acquisition, embedded systems, and serial device networking.