Comprehensive Product Summary – Rayon Technology P2048 Universal PCIPORT Card

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### 1. Product Overview

Product Name: UPCI 48x RS422/RS485 Intelligent Serial Solution
Model: P2048
Series: Universal PCIPORT Card Series
Article Number: P2048
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 P2048 is a high-density, intelligent multi-port PCI serial communication card designed to provide 48 RS422/RS485 ports through a single PCI slot. It is part of Rayon’s Universal PCIPORT family, which includes a range of multi-port serial interface cards supporting RS232, RS422, and RS485 standards. The P2048 is engineered for industrial, automation, and communication applications requiring reliable, high-speed, multi-channel serial connectivity.

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### 2. Key Features

- High Port Density: Supports 48 independent RS422/RS485 serial ports via three external connector boxes (NF216).
- Universal PCI Compatibility: Operates in both 5V and 3.3V PCI 33MHz bus slots, ensuring compatibility with legacy and modern systems.
- Single IRQ Resource: Utilizes only one IRQ for all 48 ports, minimizing system resource usage.
- Flexible Interface Configuration: Each port can be independently configured as RS422 or RS485 using DIP switches.
- Wide Software Support: Compatible with DOS, Windows 95/98/Me, Windows NT/2000/XP/Vista/7, Linux, and SCO OpenServer.
- Intelligent Architecture: Based on the P640NU intelligent multi-port card platform, providing efficient data handling and reduced CPU load.
- High-Speed Communication: Each port supports baud rates from 110 to 115,200 bps, with UNIX compatibility mappings for 57,600, 76,800, and 115,200 bps.
- Flow Control Options: Supports both software (XON/XOFF) and hardware (RTS/CTS) flow control.
- Industrial Reliability: Designed for continuous operation in industrial environments with wide temperature and humidity tolerance.
- Upgradeable Platform: Compatible with Rayon’s intelligent PCIIOP series cards (e.g., P990F with Intel 80960JF processor, IOP3927F with 133MHz MIPS processor) using the same connector boxes.

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### 3. Technical Specifications

Card Dimensions: 5.0 × 3.4 inches (127 × 86 mm)
Weight: Approx. 150 g (card only)
Material: High-grade PCB with gold-plated PCI contacts
Interface Type: PCI 2.2 compliant, 33MHz, 32-bit, 3.3V/5V signaling
Maximum Cards per System: 2
Connector Type: DB9 male connectors on NF216 boxes
Cable: A640 cable (0.7 m) included
Power Requirements: Supplied via PCI bus (3.3V/5V)
Operating Temperature: 5°C to 40°C
Storage Temperature: 0°C to 65°C
Operating Humidity: 10% to 90% RH (non-condensing)
Storage Humidity: 5% to 90% RH (non-condensing)

Electrical Interface:
- RS422 differential signaling
- RS485 half-duplex or full-duplex selectable
- DIP switch configuration per port

Baud Rate Range: 110 – 115,200 bps
Flow Control: XON/XOFF (software), RTS/CTS (hardware)
Memory Mapping:
- 128 bytes for PCI controller
- Two 4KB blocks for UART controller
I/O Mapping:
- 128 bytes I/O for PCI controller
- 256 bytes I/O for UART controller
- 64 bytes I/O for status register
IRQ Assignment: One free IRQ assigned automatically by PCI BIOS

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### 4. Functionality

The P2048 functions as a high-performance serial communication interface card that expands a host system’s serial connectivity. It integrates with three NF216 connector boxes, each providing 16 RS422/RS485 ports, for a total of 48 ports. The card’s intelligent design offloads serial communication tasks from the host CPU, improving overall system performance.

Use Cases and Applications:
- Industrial automation and control systems
- Data acquisition and instrumentation
- Multi-terminal communication servers
- SCADA and process control networks
- Serial device networking and monitoring
- POS and kiosk systems requiring multiple serial interfaces

Compatibility:
- Operating Systems: DOS, Windows 95/98/Me/NT/2000/XP/Vista/7, Linux, SCO OpenServer
- Hardware: Compatible with standard PCI slots (3.3V/5V, 33MHz)
- Software Drivers: Provided for all supported OS platforms, including source-level drivers for Linux

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### 5. Components & Accessories

Included Components:
- 1 × P640NU intelligent multi-port PCI card
- 3 × NF216 connector boxes (each with 16 RS422/RS485 ports)
- 1 × A640 interconnect cable (0.7 m)

Optional Accessories:
- Additional NF216 boxes for expansion (up to 64 ports with P2064 model)
- PCIIOP intelligent upgrade cards (P990F, IOP3927F)
- Extended-length A640 cables for remote box placement
- Mounting brackets for daisy-chained box configurations

Connector Details (NF216 Box):
- 16 × DB9 male connectors
- Each port configurable via DIP switch for RS422 or RS485 mode
- Signal pins:
- Pin 2: RXD+ (input)
- Pin 3: TXD+ (output)
- Pin 4: TXD– (output)
- Pin 5: Signal Ground
- Pin 6: RXD– (input)
- Pins 1, 7–9: Not connected

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### 6. Installation & Setup

System Requirements:
- IBM PC/AT or compatible system
- Available PCI 33MHz slot (3.3V or 5V)
- Supported operating system (DOS, Windows, Linux, SCO)

Installation Steps:
1. Power off the system and insert the P2048 card into an available PCI slot.
2. Connect the A640 cable between the card and the first NF216 box.
3. Daisy-chain additional NF216 boxes using the provided connectors.
4. Secure boxes using mounting brackets if multiple units are used.
5. Power on the system; the PCI BIOS will assign resources automatically.
6. Install the appropriate driver for your operating system:
- Windows: Use Plug & Play installation; specify driver path (e.g., A:\WIN2000).
- Linux: Use provided source driver; compile and install via `/etc/rayon/Install`.
- SCO UNIX: Install using `/etc/custom` or `tar` method, then rebuild the kernel.
7. Configure port parameters (baud rate, parity, flow control) via software or DIP switches.

Configuration Notes:
- Each port’s RS422/RS485 mode is set independently via DIP switch.
- Only one IRQ is used for all ports, simplifying resource management.
- For Linux systems, device names follow the convention `/dev/tty6[1–8][a–h]` for the first card and `/dev/tty7[1–8][a–h]` for the second card.

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### 7. Performance & Capabilities

Communication Speed:
- 110 to 115,200 bps per port
- UNIX-compatible mappings for 57,600, 76,800, and 115,200 bps

Throughput:
- Optimized for simultaneous multi-port operation
- Efficient interrupt handling via single IRQ

Capacity:
- 48 independent serial channels per card
- Up to 2 cards per system (96 ports total)

Efficiency:
- Intelligent UART management reduces CPU overhead
- FIFO buffering ensures stable data transmission under heavy load

Limitations:
- Maximum of 48 ports per card (expandable to 64 with P2064 model)
- Requires proper driver installation for full OS compatibility

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### 8. Standards & Compliance

Bus Interface: PCI 2.2 compliant (33MHz, 32-bit)
Electrical Standards:
- RS422 (EIA-422) differential signaling
- RS485 (EIA-485) balanced transmission
Environmental Compliance:
- Operating temperature: 5°C to 40°C
- Humidity: 10%–90% RH non-condensing
Software Compliance:
- Fully compatible with major operating systems (Windows, Linux, SCO)
- Linux driver source provided for kernel versions 2.2, 2.4, and 2.6
Regulatory:
- Designed to meet CE and FCC Class A industrial standards (manufacturer standard)

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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)
- Driver updates and documentation available on [www.rayontech.com](http://www.rayontech.com)
- RMA (Return Material Authorization) procedure available for repairs

Maintenance Recommendations:
- Ensure proper grounding and shielding for RS422/RS485 networks
- Avoid hot-swapping connector boxes; always power down before connecting/disconnecting
- Periodically inspect cables and connectors for wear or damage

Upgrade Path:
- The P2048 can be upgraded to intelligent PCIIOP series cards (P990F or IOP3927F) for enhanced processing power and local CPU management.
- Existing NF216 connector boxes remain compatible with upgraded cards.

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### Summary

The Rayon P2048 Universal PCIPORT Card is a robust, high-capacity serial communication solution designed for industrial and enterprise environments requiring multiple RS422/RS485 connections. Its intelligent architecture, broad OS support, and flexible configuration make it ideal for system integrators and OEMs seeking scalable serial connectivity. With 48 ports managed through a single PCI slot and a unified IRQ, the P2048 delivers exceptional efficiency, reliability, and compatibility across diverse computing platforms.

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