Comprehensive Product Summary – Rayon Technology A3024I PCIe 24-Port Isolated Serial Communication Card

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### 1. Product Overview

Product Name: A3024I PCIe 24-Port Isolated Serial Communication Solution
Model: A3024I
Series: A320 Advanced PCIe Intelligent Multiport Card Series
Article Number: A3024I
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 / info@rayontech.com.tw
- Web: [www.rayontech.com](http://www.rayontech.com)

The A3024I is a high-density, industrial-grade PCI Express (PCIe) serial communication card designed to provide up to 24 isolated serial ports configurable as RS-232, RS-422, or RS-485. It is part of Rayon’s A320 intelligent multiport architecture, supporting modular expansion up to 64 ports per system. The card integrates advanced isolation, flexible interface configuration, and broad OS compatibility, making it ideal for industrial automation, data acquisition, and multi-terminal communication systems.

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### 2. Key Features

- High Port Density: Supports up to 24 isolated serial ports (RS-232/422/485) in a single PCIe slot.
- Scalable Architecture: Based on the A320 intelligent multiport platform, expandable up to 64 ports per card using external connector boxes (NF/IF series).
- Single IRQ Operation: All ports share one interrupt request (IRQ), minimizing system resource usage.
- Intelligent Processor Core: Integrated 3.3V intelligent processor for efficient data handling and reduced CPU load.
- Flexible Interface Configuration: Each port can be independently configured as RS-232, RS-422, or RS-485 via DIP switches.
- Ground Isolation: Provides galvanic isolation for each port to prevent ground loops and electrical interference.
- High-Speed Communication: Supports baud rates from 110 bps to 115,200 bps (software-selectable).
- Comprehensive OS Support: Compatible with DOS, Windows 95/98/Me/NT/2000/XP/Vista/7, Linux, and SCO OpenServer.
- Plug-and-Play PCIe Interface: Fully compliant with PCI Express bus standards, supporting 3.3V and 5V signaling at 33 MHz.
- Industrial Reliability: Designed for continuous operation in industrial environments with wide temperature and humidity tolerance.
- Included Cable: Supplied with A640 0.7 m DB37 male cable for connection to external interface boxes.
- Compact Form Factor: 122 mm × 86 mm PCB size for easy integration into standard PC enclosures.

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### 3. Technical Specifications

Card Dimensions: 122 mm × 86 mm (approx. 10.0 × 9.5 cm)
Weight: Approx. 150 g (card only)
Material: Multi-layer PCB with industrial-grade components
Bus Interface: PCI Express (3.3V/5V, 33 MHz)
Maximum Cards per System: 2
Connector Type: DB37 male connector (on card)
Included Cable: A640 0.7 m cable (DB37 to external box interface)
Supported Connector Boxes: NF116, NF216, NF316, IF108, IF208, IF308
Port Count: 24 isolated serial ports (expandable up to 64)
Interface Standards: RS-232C, RS-422, RS-485 (selectable per port)
Baud Rate: 110–115,200 bps (configurable per port)
Flow Control:
- Software: XON/XOFF
- Hardware: RTS/CTS
Memory Mapping:
- 128 bytes for PCI controller
- Two 4 KB blocks for UART controller
I/O Mapping:
- 128 bytes for PCI controller
- 256 bytes for UART controller
- 64 bytes for status register
IRQ Assignment: Single IRQ assigned by PCI BIOS
Operating Temperature: 5°C to 40°C
Storage Temperature: 0°C to 65°C
Operating Humidity: 10%–90% RH (non-condensing)
Storage Humidity: 5%–90% RH

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### 4. Functionality

The A3024I functions as an intelligent multiport serial communication controller. It interfaces with the host system via PCIe and manages serial data transmission through external connector boxes. Each port can operate as RS-232, RS-422, or RS-485, allowing flexible deployment across various communication topologies:

- RS-232: Standard point-to-point serial communication for local devices.
- RS-422: Differential signaling for long-distance, noise-resistant communication.
- RS-485: Multi-drop bus configuration for multi-node industrial networks.

The card’s intelligent processor offloads serial communication tasks from the host CPU, improving system performance and stability. It supports both memory-mapped and I/O-mapped operation modes, automatically configured by the PCI BIOS.

Typical Applications:
- Industrial automation and process control
- SCADA and data acquisition systems
- Multi-terminal serial device management
- POS and kiosk systems
- Embedded control and instrumentation
- Communication gateways and protocol converters

Compatibility:
- PCIe-compliant motherboards (x1/x4/x8/x16 slots)
- Compatible with Rayon NF/IF series connector boxes for interface expansion and isolation.

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### 5. Components & Accessories

Included Items:
- A3024I PCIe card
- A640 0.7 m DB37 cable
- Driver and documentation package

Optional Accessories:
- NF116 Box: 16-port RS-232C compatible interface (DB9 male connectors)
- NF216 Box: 16-port RS-422/RS-485 selectable interface (DB9 male connectors)
- NF316 Box: 16-port RS-232/RS422/RS485 selectable interface (DB9 male connectors)
- IF108 Box: 8-port ground-isolated RS-232C interface (DB9 male connectors)
- IF208 Box: 8-port ground-isolated RS-422/RS-485 selectable interface (DB9 male connectors)
- IF308 Box: 8-port ground-isolated RS-232/RS-422/RS-485 selectable interface (DB9 male connectors)

Connector Box Dimensions: 268 × 128 × 38 mm
Box Controller: FIFO type 16C554 UART
Isolation: Full ground isolation per port
Daisy-Chain Capability: Up to 8 boxes per card (64 ports total)

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### 6. Installation & Setup

Hardware Installation:
1. Power off the host PC and disconnect AC power.
2. Insert the A3024I card into an available PCIe slot.
3. Connect the A640 cable from the card’s DB37 connector to the external interface box.
4. Daisy-chain additional boxes if required (up to 8 per card).
5. Secure all connections and power on the system.

Software Installation:
- Windows: Plug-and-play detection; install drivers from provided media or specify directory (e.g., A:\WIN2000).
- Linux: Install source-based driver via `/etc/rayon/Install` script; supports kernel 2.2–2.6 and later.
- SCO UNIX: Use `/etc/custom` or `tar` installation method to integrate driver into kernel.
- DOS/Legacy Windows: Use I/O map mode driver for DOS/Win95/98/Me systems.

Configuration:
- DIP switches on connector boxes select RS-232/422/485 mode per port.
- COM port numbering and IRQ assignment handled automatically by BIOS and driver.
- Linux and UNIX systems use device naming conventions `/dev/tty6xx` or `/dev/tty7xx` depending on card mode.

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### 7. Performance & Capabilities

Data Throughput: Up to 115.2 kbps per port (aggregate throughput depends on system configuration).
Latency: Low-latency communication via intelligent processor and FIFO buffering.
Isolation Voltage: Ground isolation per port (model-dependent, typically 1 kV).
Efficiency: Single IRQ and shared memory mapping minimize CPU overhead.
Scalability: Supports up to 64 ports per card and two cards per system (128 ports total).
Reliability: Designed for 24/7 industrial operation with robust EMI/RFI protection.
Limitations:
- Maximum of two cards per system.
- Baud rate limited to 115.2 kbps per port (standard UART).
- RS-485 multi-drop limited by cable length and node count per standard.

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### 8. Standards & Compliance

Bus Interface: PCI Express 1.0/2.0 compliant
Serial Standards:
- EIA/TIA RS-232C
- EIA/TIA RS-422
- EIA/TIA RS-485
Electrical Isolation: Meets industrial isolation standards for ground loop protection.
Operating System Drivers:
- DOS, Windows 95/98/Me/NT/2000/XP/Vista/7
- Linux (RedHat, Slackware, kernel 2.2–2.6+)
- SCO OpenServer 5.0.x
Regulatory Compliance:
- CE and FCC Class A (industrial environment)
- RoHS compliant components
Industry Standards: Compatible with standard UART-based communication protocols and FIFO buffering (16C554).

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### 9. Additional Information

Warranty:
- One-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 (Return Material Authorization) required for repairs.
- Firmware and driver updates available from Rayon’s website.

Maintenance Recommendations:
- Ensure proper grounding and shielding of cables.
- Avoid hot-swapping connector boxes under power.
- Periodically verify driver updates for OS compatibility.

Repair Policy:
- In-warranty repairs free of charge (excluding shipping).
- Out-of-warranty repairs available at flat-rate service charge.
- RMA number required before returning products.

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### Summary

The Rayon A3024I PCIe 24-Port Isolated Serial Solution is a robust, scalable, and intelligent communication interface designed for industrial and enterprise environments requiring multiple serial connections. Leveraging the A320 intelligent multiport architecture, it provides flexible configuration, high reliability, and broad OS support. With its modular connector box system, ground isolation, and single-IRQ efficiency, the A3024I delivers a cost-effective and high-performance solution for complex serial communication infrastructures.

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