Comprehensive Product Summary – RAYON IOP3927F Intelligent Multiport CPU Card

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### 1. Product Overview

Product Name: IOP3927F Intelligent Multiport CPU Card
Model: IOP3927F
Series: PCIIOP Intelligent Processor Series
Article Number: IOP3927F
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 IOP3927F is an intelligent PCI CPU card designed for high-performance multiport serial communication systems. It integrates a 133 MHz RISC processor and 16 MB of dual-port SDRAM, enabling offloading of serial I/O processing from the host CPU. The card supports up to 64 serial ports through daisy-chained external connector boxes, offering flexible RS232, RS422, and RS485 interfaces for industrial and multi-user applications.

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### 2. Key Features

- High-Performance Embedded Processor:
Equipped with a 133 MHz TMPR3927 RISC CPU delivering 3927 MIPS, ensuring efficient data handling and minimal host CPU load.

- Large Dual-Port Memory Architecture:
16 MB SDRAM shared between the local processor and host system via PCI memory mapping, with up to 1 MB receive and 512 kB transmit buffer per port.

- Scalable Multiport Expansion:
Supports 8 to 64 serial ports per card using external connector boxes (NF116, NF216, NF316, F641/F642, IF108/208/308). Up to two cards per system for a total of 128 ports.

- Universal PCI Compatibility:
Operates in both 3.3 V and 5 V 33 MHz PCI slots; compatible with 32-bit and 64-bit PCI buses.

- Flexible Interface Configuration:
Each port can be independently configured as RS232, RS422, or RS485 via DIP switches on the connector boxes.

- High-Speed Serial Communication:
Supports baud rates from 110 bps to 230,400 bps (software-selectable), with hardware (RTS/CTS) and software (XON/XOFF) flow control.

- Operating System Support:
Comprehensive driver support for DOS, Windows 95/98/Me/NT/2000/XP/Vista/7, Linux, and SCO OpenServer.

- Industrial Reliability:
Designed for continuous operation in 5–40 °C environments with 10–90 % relative humidity.

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### 3. Technical Specifications

CPU: 133 MHz TMPR3927 RISC processor
Memory: 16 MB SDRAM dual-port RAM
Bus Interface: PCI 3.3 V/5 V, 33 MHz, 32-bit
Connector: 37-pin D-type male connector (to external I/O boxes)
Maximum Ports: 64 per card (8 boxes × 8 ports or 4 boxes × 16 ports)
Baud Rate Range: 110 bps – 230,400 bps
Flow Control: XON/XOFF (software), RTS/CTS (hardware)
Dimensions: 137 mm × 106 mm
Weight: Approx. 200 g (card only)
Power Requirements: Supplied via PCI bus (3.3 V/5 V)
Operating Temperature: 5 °C – 40 °C
Storage Temperature: 0 °C – 65 °C
Operating Humidity: 10 % – 90 % RH
Storage Humidity: 5 % – 90 % RH
Enclosure Material: PCB with metal bracket (for PCI mounting)

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### 4. Functionality

The IOP3927F acts as an intelligent I/O processor that manages serial data communication independently of the host CPU. It uses dual-port RAM for high-speed data exchange between the local RISC processor and the system CPU. External connector boxes provide the physical serial interfaces, each containing UART controllers and DIP-switch-configurable interface modes.

Use Cases:
- Multi-user terminal systems
- Industrial automation and data acquisition
- Network device management
- Serial console management for servers
- SCADA and remote monitoring systems

Compatibility:
- Works with NF116 (RS232), NF216 (RS422/RS485), NF316 (RS232/RS422/RS485) connector boxes.
- Supports daisy-chaining up to 8 boxes per card.
- Compatible with P640NU intelligent multiport card and A640 connection cable.

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### 5. Components & Accessories

Included Components:
- IOP3927F PCI CPU card
- 37-pin D-type male connector interface
- Driver and installation media

Compatible Connector Boxes:
- NF116: 16-port RS232C box (DB9 male connectors)
- NF216: 16-port RS422/RS485 box (DB9 male connectors)
- NF316: 16-port RS232/RS422/RS485 box (DB9 male connectors)
- F641/F642: 8-port RS232C/RS422 boxes (DB25 male connectors)
- IF108/208/308: Ground-isolated RS232/RS422/RS485 boxes (8 ports)

Optional Accessories:
- A640 cable (connects card to boxes)
- Daisy-chain brackets for multi-box mounting
- R801/R804 cables for RS232 DB25/DB9 connectivity
- R803 cable for RS422/RS485 isolated interface

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### 6. Installation & Setup

Hardware Installation:
1. Power off the PC and disconnect AC power.
2. Insert the IOP3927F card into an available PCI slot.
3. Connect the 37-pin cable to the first external box (NF/F/IF series).
4. Daisy-chain additional boxes as required (up to 8 per card).
5. Secure boxes using provided brackets.

Software Installation:
- Windows NT/2000/XP/Vista/7:
Use Plug & Play detection or manual driver installation from the provided diskette (A:\WIN2000). Configure COM port numbering via Device Manager → Multi-port Serial Adapter → Setup.
- Linux:
Install source-based driver via `/etc/rayon/Install`. Supports RedHat and Slackware distributions. Device nodes created as `/dev/tty6[1–8][a–h]` for first card, `/dev/tty7[1–8][a–h]` for second.
- SCO UNIX:
Install using `/etc/custom` or `tar` method. Rebuild kernel after installation.
- DOS/Windows 9x:
Use I/O map mode drivers; specify COM port start number during installation.

Configuration:
- Each port’s interface type (RS232/RS422/RS485) is set via DIP switches on the connector box.
- JP1 jumper on the card selects first or second card mode.
- COM port numbering and IRQ assignment handled automatically by PCI BIOS.

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### 7. Performance & Capabilities

- Processing Power: 133 MHz RISC CPU (3927 MIPS)
- Memory Bandwidth: Dual-port SDRAM accessible by both local and host CPUs
- Port Capacity: Up to 64 ports per card; 128 ports per system (2 cards)
- Baud Rate: 110 bps to 230,400 bps (software-selectable)
- Buffer Allocation: Up to 1 MB receive and 512 kB transmit buffer per port
- Data Throughput: Up to 230 kBd per port
- Latency: Reduced host CPU overhead due to local processing
- Efficiency: FIFO-type UART controllers (16C554) ensure smooth data flow
- Limitations:
- Maximum two IOP3927F cards per system
- Requires matching box type (F-series, NF-series, or IF-series)
- RS485 mode requires proper termination and biasing

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### 8. Standards & Compliance

- Electrical Interface Standards:
RS232C (EIA/TIA-232), RS422, RS485 compliant
- Bus Interface: PCI Local Bus Specification Rev. 2.2
- UART Controller: FIFO type 16C554
- Operating Systems Supported:
DOS, Windows 95/98/Me/NT/2000/XP/Vista/7, Linux (kernel 2.2–2.6+), SCO OpenServer
- Regulatory Compliance:
CE and FCC Class A (industrial environment)
- Industry Standards:
Compatible with standard DB9/DB25 pinouts and serial communication protocols

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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 requires model, serial number, and fault description.

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

Upgrade Path:
- Compatible with P640NU intelligent multiport card and PCIIOP series.
- Users can migrate from P640NU to IOP3927F using the same connector boxes.

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### Summary

The RAYON IOP3927F is a robust, high-performance intelligent serial communication controller designed for industrial and multi-user environments. Its 133 MHz RISC processor and 16 MB dual-port memory architecture deliver exceptional throughput and reliability. With flexible interface options (RS232/RS422/RS485), scalable port expansion up to 64 ports per card, and comprehensive OS driver support, the IOP3927F provides a complete solution for demanding serial communication applications such as data acquisition, automation, and network management. Its modular design, universal PCI compatibility, and industrial-grade construction make it a long-term, scalable platform for multiport serial connectivity.