Comprehensive Product Summary – OPe954 PCIe 4-Port RS232 Card with Linux Driver
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### 1. Product Overview

Product Name: OPe954 PCIe 4-Port RS232 Card
Model Number: OPe954
Series: OPe9xx PCI Express Serial Communication Series
Article Number: OPe954
Manufacturer: Rayon Technology Co., Ltd.
Manufacturer Address: 2F, No. 177, Chung Shan 2 Rd., Lu Chou City, Taipei Hsien, Taiwan
Contact Information:
- Telephone: +886-2-82858362
- Fax: +886-2-82857065
- Email: rayon@ms1.hinet.net
- Website: [www.rayontech.com](http://www.rayontech.com) / [www.computex.com.tw/rayon](http://www.computex.com.tw/rayon)

Product Description:
The OPe954 is a high-performance PCI Express (PCIe) expansion card designed to provide four independent RS232 serial communication ports for desktop and industrial computer systems. It is engineered for robust and reliable serial connectivity, supporting a wide range of operating systems including Windows 2000, XP, 2003, Vista, and Linux. The card is Oxford 16950 compatible, ensuring stable and efficient serial data transmission at configurable baud rates from 50 to 115200 bps.

The OPe954 is ideal for industrial control, automation, instrumentation, and communication applications requiring multiple serial interfaces in a single PCIe slot.

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### 2. Key Features

- Four Independent RS232 Ports: Provides four fully functional RS232 serial communication channels on a single PCIe card, enabling simultaneous multi-device connectivity.
- Oxford 16950 Compatible Controller: Each port is based on an Oxford 16950-compatible UART, offering advanced buffering, high-speed data transfer, and compatibility with legacy serial devices.
- PCI Express Interface: Utilizes the PCIe bus architecture for high-speed data throughput and plug-and-play installation.
- Flexible Baud Rate Configuration: Supports baud rates from 50 bps up to 115200 bps per port, suitable for a wide range of serial communication devices.
- Memory-Mapped I/O: System I/O and IRQ mapping are automatically assigned by the PCI BIOS, simplifying system integration and resource allocation.
- Compact Design: The card measures 93 mm x 70 mm, fitting standard PCIe slots; a low-profile version (OPe954L) is available for compact systems.
- DB44 Connector Interface: The main card features a DB44 female connector, which connects to an included breakout cable (R904) that provides four DB9 male connectors.
- Cross-Platform Driver Support: Compatible with multiple operating systems including Windows 2000, XP, 2003, Vista, and Linux distributions.
- Industrial-Grade Reliability: Designed for continuous operation in industrial environments with wide temperature and humidity tolerance.
- Scalable Product Family: Part of Rayon’s OPe9xx series, offering 2-port (OPe952) and 8-port (OPe958) variants for flexible system expansion.

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### 3. Technical Specifications

General Specifications:
- Model: OPe954
- Interface Type: PCI Express (PCIe)
- Number of Ports: 4 independent RS232 ports
- Controller Type: Oxford 16950 compatible UART
- Baud Rate Range: 50 bps to 115200 bps per port
- Connector Type: DB44 female on card
- Breakout Cable: DB44 male to 4 × DB9 male (Model R904)
- Card Dimensions: 93 mm (L) × 70 mm (W)
- Bracket Options:
- Standard PCIe bracket (OPe954)
- Low-profile PCIe bracket (OPe954L)

Electrical and Environmental Specifications:
- 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)
- Power Requirements: Supplied via PCIe bus (exact current draw not specified)

System Resource Allocation:
- I/O Mapping: Memory mapping assigned automatically by PCI BIOS
- IRQ Assignment: Single IRQ mapping assigned by PCI BIOS

Material and Build:
- PCB Material: Industrial-grade multilayer PCB with EMI shielding
- Connectors: Gold-plated contacts for improved conductivity and corrosion resistance
- Bracket Material: Stainless steel (standard and low-profile options)

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### 4. Functionality

Operational Overview:
The OPe954 functions as a PCIe expansion card that adds four RS232 serial communication ports to a host computer. Once installed in a PCIe slot, the card is automatically detected by the system BIOS and operating system. The memory and IRQ resources are dynamically assigned, ensuring conflict-free operation.

Each of the four ports operates independently, allowing simultaneous communication with multiple serial devices such as modems, barcode scanners, PLCs, sensors, and industrial controllers. The Oxford 16950-compatible UART provides advanced buffering and flow control, ensuring stable data transmission even under high-load conditions.

Use Cases and Applications:
- Industrial Automation: Connecting PLCs, sensors, and control modules.
- Point-of-Sale (POS) Systems: Integrating receipt printers, barcode readers, and cash drawers.
- Networking and Communication: Serial console access for routers, switches, and embedded systems.
- Instrumentation: Data acquisition from measurement devices and laboratory instruments.
- Legacy Equipment Integration: Providing modern PCIe connectivity for older RS232-based devices.

Compatibility:
- Operating Systems:
- Windows 2000 / XP / 2003 / Vista
- Linux (kernel-level driver support included)
- SCO UNIX and other compatible systems
- Hardware Platforms:
- Desktop PCs, industrial PCs, and servers with available PCIe slots
- Compatible with both standard and low-profile chassis (with appropriate bracket)

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### 5. Components & Accessories

Included Items:
- OPe954 PCIe 4-Port RS232 Card (with standard PCIe bracket)
- R904 Connector Cable: DB44 male to 4 × DB9 male breakout cable
- Driver and documentation (Linux and Windows support)

Optional Accessories:
- Low-Profile Bracket: For installation in compact or small-form-factor systems (model OPe954L).
- Additional Cables: Replacement or extended DB44-to-DB9 breakout cables available upon request.

Connector Details:
- On-Card Connector: DB44 female
- Breakout Cable Connectors:
- DB44 male (to card)
- Four DB9 male connectors (to devices)

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### 6. Installation & Setup

System Requirements:
- Available PCI Express slot (x1 or higher)
- Compatible operating system (Windows 2000/XP/2003/Vista or Linux)
- Administrative privileges for driver installation

Installation Procedure:
1. Power off the host computer and disconnect it from the power source.
2. Insert the OPe954 card into an available PCIe slot, ensuring a secure connection.
3. Attach the R904 breakout cable to the DB44 connector on the card.
4. Connect RS232 devices to the DB9 connectors on the breakout cable.
5. Power on the system; the BIOS will automatically assign memory and IRQ resources.
6. Install the appropriate driver for your operating system (Windows or Linux).
7. Verify installation through the Device Manager (Windows) or system logs (Linux).

Mounting Options:
- Standard PCIe bracket for full-height systems.
- Optional low-profile bracket for compact enclosures.

Configuration:
- Baud rate, parity, stop bits, and flow control can be configured via software or terminal settings.
- Each port can be independently configured for different communication parameters.

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### 7. Performance & Capabilities

Data Transmission:
- Each RS232 port supports full-duplex communication.
- Configurable baud rates from 50 bps to 115200 bps.
- Hardware and software flow control supported (RTS/CTS, XON/XOFF).

Throughput and Efficiency:
- PCIe interface ensures high-speed data transfer between the host and serial devices.
- Oxford 16950-compatible UART provides 128-byte FIFO buffers for efficient data handling.
- Memory-mapped I/O architecture reduces CPU overhead and latency.

System Capacity:
- Supports up to two OPe954 cards per system, allowing a total of eight RS232 ports.
- Each card operates independently with unique resource allocation.

Reliability and Stability:
- Designed for continuous operation in industrial environments.
- Wide operating temperature and humidity range ensures stable performance under varying conditions.
- Gold-plated connectors and robust PCB design enhance durability and signal integrity.

Limitations:
- Maximum of two cards per system (eight ports total).
- Baud rate limited to 115200 bps per port (not suitable for high-speed serial protocols beyond this range).

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### 8. Standards & Compliance

Bus Interface Standard:
- PCI Express (PCIe) compliant

Serial Communication Standard:
- RS232 (EIA/TIA-232 standard)

Controller Compatibility:
- Oxford 16950 UART compatible

Operating System Compliance:
- Fully compatible with Windows 2000, XP, 2003, Vista, and Linux distributions
- Supports standard serial communication APIs and drivers

Environmental and Safety Compliance:
- Designed to meet industrial-grade environmental standards
- RoHS-compliant materials (lead-free manufacturing)
- CE and FCC compliance (typical for Rayon PCIe products; specific certification details available upon request)

Industry Standards:
- EIA/TIA-232 for electrical characteristics and signal definitions
- PCI Express Base Specification for bus interface compliance

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### 9. Additional Information

Warranty:
- Standard manufacturer warranty (typically one year; confirm with Rayon Technology).
- Covers defects in materials and workmanship under normal use conditions.

Technical Support:
- Provided directly by Rayon Technology Co., Ltd.
- Support available via email and telephone.
- Driver updates and documentation accessible through the official website.

Maintenance:
- No regular maintenance required beyond standard system care.
- Periodic inspection of connectors and cables recommended for industrial environments.
- Firmware and driver updates should be applied as released to ensure compatibility and performance.

Product Family and Upgrade Options:
- OPe952: PCIe card supporting two RS232 ports.
- OPe958: PCIe card supporting eight RS232 ports.
- UTS040: USB to four ground-isolated RS232 ports.
- UTS004: USB to four ground-isolated RS422/485 ports.
- UTS485: USB to two RS232 and two RS422/485 ports (ground isolated).
- APORT040: IP to four ground-isolated RS232 ports.
- APORT202: IP to two RS232 and two RS422/485 ports (ground isolated).

Support and Updates:
- Driver packages for Windows and Linux available from Rayon’s website.
- Technical documentation, installation guides, and FAQs provided online.
- Low-profile bracket and additional accessories available upon request.

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### Summary

The Rayon OPe954 PCIe 4-Port RS232 Card is a robust, industrial-grade serial communication solution designed for users who require multiple RS232 interfaces within a single PCIe slot. With four independent ports, Oxford 16950 compatibility, and cross-platform driver support, it provides reliable and efficient serial connectivity for industrial automation, instrumentation, and legacy device integration.

Its compact 93 × 70 mm form factor, optional low-profile bracket, and included DB44-to-DB9 breakout cable make it adaptable to a wide range of system configurations. The OPe954’s memory-mapped I/O and automatic IRQ assignment simplify installation and ensure stable operation across supported operating systems.

Engineered by Rayon Technology Co., Ltd., the OPe954 exemplifies durability, compatibility, and performance, making it a preferred choice for industrial and commercial applications requiring dependable multi-port serial communication over PCI Express.

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Manufacturer Contact:
Rayon Technology Co., Ltd.
2F, No. 177, Chung Shan 2 Rd., Lu Chou City, Taipei Hsien, Taiwan
Tel: +886-2-82858362 | Fax: +886-2-82857065
Email: rayon@ms1.hinet.net
Web: [www.rayontech.com](http://www.rayontech.com)

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*End of Comprehensive Product Summary – OPe954 PCIe 4-Port RS232 Card with Linux Driver*