Comprehensive Product Summary – RAYON IOP3927U Intelligent PCI CPU Card System

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### 1. Product Overview

Product Name: IOP3927U Intelligent PCI CPU Card
Model: IOP3927U
Series: PCIIOP / UPCI Intelligent Multiport Processor Series
Article Number: IOP3927U
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 IOP3927U is an intelligent PCI-based input/output processor card designed for high-performance multiport serial communication systems. It integrates a 133 MHz RISC CPU and 16 MB of dual-port SDRAM, enabling offloading of serial communication tasks from the host CPU. The card supports up to 64 serial ports through modular connector boxes (NF116, NF216, NF316, F641/F642, etc.) and is fully user-programmable for time-critical applications.

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### 2. Key Features

- High-Performance Embedded Processor:
Equipped with a 133 MHz TMPR3927 RISC CPU for intelligent I/O management and real-time data handling.

- Dual-Port SDRAM Architecture:
16 MB SDRAM shared between the local processor and host CPU via PCI bus mapping, ensuring high-speed data exchange.

- Universal PCI Compatibility:
Supports both 3.3 V and 5 V PCI slots, compliant with 33 MHz PCI bus standards.

- Scalable Multiport Design:
Supports 8 to 64 serial ports per card through daisy-chained external connector boxes.

- Flexible Interface Configuration:
Each port can be configured independently as RS-232, RS-422, or RS-485 via DIP switches.

- Advanced UART Control:
Built-in FIFO-type 16C554 UART controllers in connector boxes for efficient serial buffering.

- User Programmable:
Allows custom firmware for time-critical or application-specific tasks to be executed on the card CPU.

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

- Expandable Architecture:
Up to 8 external boxes can be daisy-chained per card, each supporting 8 or 16 ports.

- Single IRQ Resource:
Only one IRQ required for up to 64 ports, minimizing system resource usage.

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### 3. Technical Specifications

CPU: 133 MHz TMPR3927 RISC Processor
Memory: 16 MB SDRAM (dual-port, shared with host CPU)
Bus Interface: PCI 33 MHz, 3.3 V/5 V universal slot
Connector (Card): 37-pin D-type male connector for external I/O boxes
Expansion Capability: Up to 8 external boxes per card (64 ports total)
Supported Box Types: F641/F642, NF116/NF216/NF316, IF108/IF208/IF308
UART Controller: FIFO type 16C554 per box
Baud Rate: 110 bps to 230,400 bps (software mapping for compatibility)
Flow Control: XON/XOFF (software) and RTS/CTS (hardware)
Operating Environment:
- Temperature: 5 °C – 40 °C
- Humidity: 10 % – 90 % RH
Storage Environment:
- Temperature: 0 °C – 65 °C
- Humidity: 5 % – 90 % RH

Dimensions (Card): 5.0 × 3.4 inches
Dimensions (Boxes): 268 × 128 × 38 mm
Weight: Approx. 0.5 kg (card only)

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### 4. Functionality

The IOP3927U functions as an intelligent serial communication controller that offloads data handling from the host CPU. It manages data flow between the main system and external serial devices through its onboard RISC processor and dual-port memory. Communication with external devices is achieved via connector boxes linked through a 37-pin cable.

Use Cases:
- Industrial automation and data acquisition systems
- Multi-user terminal servers
- POS and kiosk systems
- Network management and console servers
- Embedded control and instrumentation systems

Compatibility:
- Works with RAYON NF116 (RS232), NF216 (RS422/RS485), NF316 (RS232/RS422/RS485) boxes
- Compatible with P640NU intelligent multiport cards and A640 cables
- Supports daisy-chaining up to 8 boxes for 64-port configurations

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### 5. Components & Accessories

Included Components:
- IOP3927U PCI CPU card
- 37-pin D-type cable (A640 or equivalent)
- Driver and utility software package

Optional Accessories:
- NF116 Box: 16-port RS232C connector box (DB9 male)
- NF216 Box: 16-port RS422/RS485 connector box (DB9 male, DIP switch selectable)
- NF316 Box: 16-port RS232/RS422/RS485 universal connector box (DB9 male)
- F641/F642 Boxes: 8-port RS232C/RS422 boxes (DB25 male)
- IF108/IF208/IF308 Boxes: Ground-isolated RS232/RS422/RS485 boxes for industrial environments
- A640 Cable: 37-pin interconnect cable for box connection
- Mounting Brackets: For multi-box daisy-chain installation

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### 6. Installation & Setup

Hardware Installation:
1. Power off the PC and disconnect AC power.
2. Insert the IOP3927U card into an available PCI slot.
3. Connect the 37-pin cable from the card to the first external box.
4. Daisy-chain additional boxes as required (up to 8).
5. Secure boxes using provided brackets for multi-box configurations.
6. Power on the system and verify LED indicators on boxes.

Software Installation:
- Windows NT/2000/XP/Vista/7:
Use Plug & Play detection or manual driver installation from A:\WIN2000 directory.
Configure COM port numbering via Device Manager → Multi-port Serial Adapter → Setup.
- Linux:
Install source-based driver from /etc/rayon directory using `./Install`.
Device naming convention: `/dev/tty[6–7][1–8][a–h]`.
- SCO UNIX:
Install via `/etc/custom` or `tar` command, rebuild kernel, and reboot.
- DOS:
Supported in I/O map mode only.

Configuration:
- Each port’s interface type (RS232/RS422/RS485) is set via DIP switches on the connector box.
- RS485 mode automatically controls data direction.
- Flow control and baud rate are software-configurable.

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### 7. Performance & Capabilities

- Maximum Ports: 64 per card (8 boxes × 8 ports or 4 boxes × 16 ports)
- Baud Rate Range: 110 bps – 230,400 bps
- Data Handling: Hardware FIFO buffering per port
- IRQ Usage: Single IRQ for all ports
- Throughput: Optimized by local RISC CPU, minimizing host CPU load
- Latency: Reduced via dual-port memory and intelligent buffering
- Efficiency: High-speed DMA-like data transfer between host and local CPU
- Limitations:
- Requires matching box type (F-series, N-series, or I-series)
- Limited to two IOP3927 cards per system (128 ports max)
- RS485 multi-drop limited by cable length and termination

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### 8. Standards & Compliance

- Electrical Interface Standards:
RS232C (EIA/TIA-232), RS422, RS485 compliant
- Bus Interface: PCI 2.2 compliant (33 MHz, 32-bit)
- UART Compatibility: 16C554 FIFO UART standard
- Operating System Drivers:
- DOS, Windows 95/98/Me/NT/2000/XP/Vista/7
- Linux (kernel 2.2, 2.4, 2.6, and later)
- SCO OpenServer 5.x
- Regulatory Compliance:
CE and FCC Class A (industrial environment)
- Environmental Compliance:
RoHS-compliant materials and lead-free soldering

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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)
- Firmware and driver updates available from [www.rayontech.com](http://www.rayontech.com)
- RMA procedure available for defective units (requires model, serial number, and issue description)

Maintenance Recommendations:
- Ensure adequate ventilation and stable power supply.
- Avoid hot-swapping cables while powered.
- Periodically verify DIP switch settings and cable integrity.

Upgrade Path:
- Compatible with P640NU intelligent multiport cards.
- Connector boxes interchangeable with PCIIOP and UPCI series.
- Supports future firmware updates for enhanced performance.

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### Summary

The RAYON IOP3927U Intelligent PCI CPU Card is a robust, high-performance solution for multiport serial communication in industrial and enterprise environments. Its embedded 133 MHz RISC processor and 16 MB dual-port SDRAM enable autonomous data handling, significantly reducing host CPU load. With modular connector boxes supporting RS232, RS422, and RS485 interfaces, the system offers exceptional flexibility and scalability—up to 64 ports per card. Comprehensive driver support across major operating systems ensures seamless integration into diverse computing environments. Designed for reliability, expandability, and performance, the IOP3927U is ideal for demanding multi-user, automation, and data acquisition applications.