Comprehensive Product Summary – Rayon Technology P640NU Intelligent Multi-Port CPU Card

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### 1. Product Overview

Product Name: UPCI 8..64-Port 3.3V/5V CPU Card
Model: P640NU
Series: UPCI Intelligent Multi-Port Serial Expansion Series
Article Number: P640NU
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
Websites: [www.rayontech.com](http://www.rayontech.com), [www.computex.com.tw/rayon](http://www.computex.com.tw/rayon)

The P640NU is an intelligent PCI CPU card designed to provide high-density serial communication expansion for industrial and enterprise systems. It supports 8 to 64 serial ports through modular connector boxes and is compatible with both 3.3V and 5V PCI 33MHz slots. The card integrates an intelligent processor and advanced UART controllers to offload serial communication tasks from the host CPU, improving overall system performance.

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### 2. Key Features

- Intelligent Processor Architecture:
Embedded 3.3V intelligent processor for managing multi-port serial communication independently of the host CPU.

- Flexible Port Expansion:
Supports 8 to 64 serial ports via daisy-chained external connector boxes (NF116, NF216, NF316). Each box provides 16 ports.

- Multi-Interface Support:
Each port can be configured individually as RS232, RS422, or RS485 using DIP switches, allowing mixed interface operation on a single card.

- Advanced UART Control:
Built-in FIFO-type 16C554 UART controller ensures efficient data buffering and high-speed serial communication.

- PCI Bus Compatibility:
Operates in both 3.3V and 5V PCI 33MHz slots, supporting up to two cards per system.

- High Performance Memory Mapping:
Supports 2 × 4KB memory map or 256B/64B I/O mapping assigned by PCI BIOS for flexible resource allocation.

- Comprehensive OS Support:
Compatible with DOS, Windows 95/98/Me/NT/2000/XP/Vista/7, Linux, and SCO OpenServer.

- Unified Driver Architecture:
Single driver package supports multiple operating systems and configurations, simplifying deployment.

- Expandable System Design:
Daisy-chain architecture allows up to four NF316 boxes or equivalent combinations for 64-port configurations.

- Included Accessories:
Ships with A640 0.7m cable for connection to external boxes.

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### 3. Technical Specifications

Card Dimensions: 122 × 86 mm (approx. 5.0 × 3.4 inches)
Connector: DB37 male connector (to A640 cable)
Supported PCI Slots: 3.3V and 5V, 33MHz
Maximum Cards per System: 2
Memory Mapping:
- 2 × 4KB memory map
- 256B and 64B I/O space assigned by PCI BIOS
Operating Voltage: 3.3V / 5V
Bus Interface: PCI 2.1 compliant
Material: Industrial-grade PCB with EMI shielding
Weight: Approx. 150g (card only)

Environmental Conditions:
- Operating Temperature: 5°C to 40°C
- Storage Temperature: 0°C to 65°C
- Operating Humidity: 10–90% RH
- Storage Humidity: 5–90% RH

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### 4. Functionality

The P640NU functions as an intelligent serial communication controller. It connects to external NF-series connector boxes via the A640 cable, enabling multiple serial interfaces from a single PCI slot. Each connector box contains 16 serial ports, and up to four boxes can be daisy-chained for 64-port operation.

Use Cases:
- Industrial automation and control systems
- Data acquisition and instrumentation
- Multi-terminal communication servers
- POS and kiosk systems
- Network device management and console access

Compatibility:
- Works with NF116 (RS232), NF216 (RS422/RS485), and NF316 (RS232/RS422/RS485) boxes.
- Compatible with IOP3927F intelligent multi-port cards for advanced configurations.
- Supports DOS, Windows, Linux, and UNIX environments.

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### 5. Components & Accessories

Included:
- P640NU CPU card
- A640 0.7m connection cable
- Driver and documentation package

Optional Connector Boxes:
1. NF116 RS232C Box
- 16 RS232 ports, DB9 male connectors
- FIFO 16C554 UART controller
- Fully hardware-controlled RS232C interface

2. NF216 RS422/RS485 Box
- 16 ports, DB9 male connectors
- DIP switch selectable RS422 or RS485 per port
- Output enable timing configurable

3. NF316 RS232/RS422/RS485 Box
- 16 ports, DB9 male connectors
- Dual DIP switch configuration for RS232/RS422/RS485
- Supports mixed interface operation

Box Dimensions: 268 × 128 × 38 mm
Box Operating Environment:
- Temperature: 5–40°C
- Humidity: 10–90% RH

Cabling:
- A640 cable (DB37 male to dual 37-pin connectors)
- Daisy-chain interconnects for multi-box expansion

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### 6. Installation & Setup

Hardware Installation:
1. Power off the system and insert the P640NU card into an available PCI slot (3.3V or 5V).
2. Connect the A640 cable to the DB37 connector on the card.
3. Attach the other end to the first NF-series connector box.
4. Daisy-chain additional boxes if required (up to four total).
5. Secure boxes using provided brackets for multi-box configurations.

Software Installation:
- Windows 95/98/Me: Plug-and-Play detection; specify driver path (A:\WIN95).
- Windows NT/2000/XP/Vista/7: Use provided INF files (A:\WIN2000).
- Linux: Install source-based driver from /etc/rayon directory using `./Install`.
- SCO OpenServer: Install via `/etc/custom` or `tar` command, then rebuild kernel.

Configuration:
- Assign COM port start numbers via driver setup utility.
- Configure DIP switches on boxes for desired interface type.
- Verify port mapping using OS device manager or `dmesg` (Linux).

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### 7. Performance & Capabilities

Port Capacity: 8–64 serial ports per card
Baud Rate: 110–115,200 bps (supports 50–230,400 bps in UNIX/Linux)
Flow Control:
- Software: XON/XOFF
- Hardware: RTS/CTS

Data Handling:
- FIFO buffering per port for reduced CPU load
- Single IRQ for all ports (assigned by PCI BIOS)
- Memory and I/O mapping modes for flexible resource allocation

Performance Highlights:
- Efficient multi-port communication with minimal host CPU overhead
- Stable operation across multiple OS platforms
- High reliability for continuous industrial operation

Limitations:
- Maximum of two cards per system (128 ports total)
- DOS and Windows 9x limited to I/O map mode
- Some legacy systems may not support 512B I/O mapping

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### 8. Standards & Compliance

- Bus Interface: PCI 2.1 compliant
- Electrical Standards: RS232C, RS422, RS485 (EIA/TIA compliant)
- UART Controller: 16C554 FIFO type
- Regulatory Compliance:
- CE and FCC Class A (industrial environment)
- RoHS compliant materials
- Operating System Drivers: Certified for Windows and Linux distributions
- Industry Compatibility: Supports integration with industrial automation, SCADA, and communication systems

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### 9. Additional Information

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

Support & Maintenance:
- Technical support via email (rayon@ms1.hinet.net)
- RMA procedure available for defective units (requires model, serial number, and issue description).
- Firmware and driver updates provided through Rayon’s website.

Upgrade Path:
- Compatible with PCIIOP series intelligent cards (e.g., P990F with Intel 80960JF CPU, IOP3927F with 133MHz MIPS processor).
- Connector boxes (NF116/NF216/NF316) are reusable across upgraded systems.

Maintenance Recommendations:
- Ensure adequate ventilation for connector boxes.
- Avoid hot-swapping cables while powered.
- Periodically check DIP switch settings and cable integrity.

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### Summary

The Rayon P640NU UPCI CPU Card is a robust, scalable, and intelligent multi-port serial communication solution designed for industrial and enterprise environments requiring high-density serial connectivity. Its modular architecture, intelligent processing, and broad OS compatibility make it ideal for applications ranging from automation control to network device management. With support for up to 64 configurable ports per card and flexible RS232/RS422/RS485 operation, the P640NU delivers exceptional versatility and performance in a compact PCI form factor.

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Manufacturer:
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)