Comprehensive Product Summary – AP2T2-2 PCI 1-Port RS422/485 Shared Port Card (5V Only)

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### 1. Product Overview

Product Name: PCI 1-Port RS422/485 Shared Port Card (5V Only)
Model: AP2T2-2
Series: AP1T2 Advanced PCI Sharer Card Series
Article Number: AP2T2-2
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.tw](http://www.rayontech.com.tw) / [www.computex.com.tw/rayon](http://www.computex.com.tw/rayon)

Product Description:
The Rayon AP2T2-2 is a PCI-based serial communication card designed to provide one shared RS422/RS485 port through two physical connectors. It is a plug-and-play PCI card that supports 5V operation and is optimized for industrial control, automation, and communication systems requiring reliable serial data exchange. The card uses the ASIX MCS9865 controller and supports baud rates from 50 to 115,200 bps. Configuration is managed via DIP switches, allowing each port to be independently set to RS422 or RS485 mode.

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### 2. Key Features

- Single-Port Shared Design:
Provides one logical COM port shared across two physical DB9 connectors, enabling Poll & Acknowledge (Poll & Ack) communication environments.

- Flexible Interface Configuration:
Each connector can be independently configured for RS422 or RS485 operation using onboard DIP switches.

- High Compatibility:
Fully compatible with PCI bus systems operating at 5V. The card is recognized automatically by the PCI BIOS, which assigns I/O, memory, and IRQ resources dynamically.

- ASIX MCS9865 Controller:
Utilizes the reliable and high-performance ASIX MCS9865 serial communication controller, ensuring stable data transmission and broad driver support.

- Wide OS Support:
Compatible with multiple operating systems including Windows 2000, XP, Vista, Windows 7/8, and Linux distributions.

- Industrial-Grade Design:
Designed for industrial control applications requiring robust and stable serial communication.

- Compact Form Factor:
Standard PCI card dimensions (75 × 90 mm) with optional low-profile brackets available upon request.

- Plug & Play Configuration:
Automatic resource allocation via PCI BIOS simplifies installation and reduces configuration complexity.

- Single Voltage Operation:
Operates exclusively on 5V PCI slots, ensuring compatibility with legacy and industrial-grade systems.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Model | AP2T2-2 |
| Bus Interface | PCI (5V only) |
| Controller Chip | ASIX MCS9865 |
| Number of Ports | 1 shared COM port (2 physical connectors) |
| Interface Type | RS422 / RS485 (selectable per port) |
| Baud Rate | 50 to 115,200 bps |
| Connector Type | 1 × DB9 male (shared), 2 × DB9 male connectors on board |
| Dimensions | 75 mm × 90 mm (AP2T2-2) |
| Material | High-quality PCB with metal bracket |
| Voltage Requirement | 5V PCI slot only |
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | 0°C to 65°C |
| Operating Humidity | 10% to 95% RH (non-condensing) |
| Storage Humidity | 5% to 95% RH (non-condensing) |
| I/O Mapping | Assigned automatically by PCI BIOS |
| Memory Mapping | Assigned automatically by PCI BIOS |
| IRQ Mapping | Assigned automatically by PCI BIOS |
| Bracket Options | Standard PCI bracket; low-profile bracket available on request |
| Compatibility | Windows 2000/XP/Vista/7/8, Linux, SCO |
| Manufacturer | Rayon Technology Co., Ltd. |

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### 4. Functionality

The AP2T2-2 PCI card provides a single logical serial communication port that can be accessed through two physical DB9 connectors. This shared-port design allows two devices to communicate with a host system in a Poll & Ack configuration, where one device transmits while the other acknowledges, ensuring orderly data exchange without signal collision.

Each connector can be configured independently for RS422 or RS485 operation using DIP switches located on the card. This flexibility allows the card to adapt to various industrial communication standards and wiring topologies.

The card’s ASIX MCS9865 controller manages serial communication efficiently, supporting data rates from 50 bps up to 115,200 bps. The PCI BIOS automatically assigns I/O addresses, memory ranges, and IRQs, eliminating manual configuration and ensuring seamless integration into existing systems.

Typical Use Cases:
- Industrial automation and control systems
- Data acquisition and monitoring
- Serial device networking
- Communication with PLCs, sensors, and instrumentation
- SCADA and process control environments
- Embedded system integration requiring RS422/RS485 connectivity

Compatibility:
The AP2T2-2 is compatible with standard PCI slots operating at 5V. It supports a wide range of operating systems, including legacy and modern Windows versions as well as Linux distributions, making it suitable for both legacy system upgrades and new industrial installations.

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### 5. Components & Accessories

Included Components:
- AP2T2-2 PCI card
- Standard PCI mounting bracket
- User manual and installation guide
- Driver CD or downloadable driver package (depending on distribution)

Optional Accessories:
- Low-profile PCI bracket (for compact or small-form-factor systems)
- RS422/RS485 communication cables (DB9 male to terminal block or DB9 male to DB9 female)
- External isolation modules (for environments requiring galvanic isolation)

Connectors:
- 2 × DB9 male connectors (shared COM port)
- Each connector configurable via DIP switch for RS422 or RS485 operation

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### 6. Installation & Setup

System Requirements:
- Available PCI slot (5V only)
- Compatible operating system (Windows 2000/XP/Vista/7/8 or Linux)
- Administrative privileges for driver installation

Installation Steps:
1. Power off the host system and disconnect it from the power source.
2. Insert the AP2T2-2 card into an available 5V PCI slot.
3. Secure the card using the provided bracket screw.
4. Reconnect power and boot the system.
5. The PCI BIOS will automatically detect the card and assign I/O, memory, and IRQ resources.
6. Install the appropriate driver from the provided CD or download from Rayon’s website.
7. Configure the DIP switches to select RS422 or RS485 mode for each connector as required.
8. Connect external devices using the DB9 connectors.

Mounting Options:
- Standard PCI bracket for full-height systems
- Optional low-profile bracket for compact enclosures

Configuration:
- DIP switches allow per-port selection of RS422 or RS485 mode.
- Baud rate and communication parameters are configured through software or device manager settings.

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### 7. Performance & Capabilities

Data Rate:
Supports baud rates from 50 bps to 115,200 bps, suitable for most industrial and automation communication requirements.

Communication Modes:
- RS422: Differential signaling for long-distance, noise-resistant communication.
- RS485: Multi-drop communication supporting up to 32 devices on a single bus.

Performance Characteristics:
- Stable data transmission with low latency.
- Automatic resource allocation ensures conflict-free operation.
- Reliable operation in industrial temperature and humidity ranges.
- Designed for continuous operation in 24/7 industrial environments.

Limitations:
- Operates only on 5V PCI slots (not compatible with 3.3V-only PCI systems).
- Shared-port design means only one device can actively transmit at a time (Poll & Ack mode).

Efficiency:
- Low power consumption due to efficient ASIX MCS9865 controller.
- Optimized for minimal CPU overhead during serial communication.

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### 8. Standards & Compliance

Bus Interface Standard:
- PCI Local Bus Specification (5V signaling)

Communication Standards:
- EIA/TIA RS422
- EIA/TIA RS485

Environmental Compliance:
- Operating temperature: 0°C to 55°C
- Storage temperature: 0°C to 65°C
- Humidity: 10%–95% RH (operating), 5%–95% RH (storage)

Regulatory Compliance:
- Designed to meet industrial-grade EMI/EMC standards (specific certifications may vary by region).
- Manufactured under quality control standards consistent with ISO-certified processes.

Software Compliance:
- Compatible with Windows and Linux serial communication standards.
- Plug & Play compliant with PCI BIOS resource allocation.

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### 9. Additional Information

Warranty:
Typically covered by Rayon Technology’s standard limited hardware warranty (duration and terms may vary by region or distributor).

Technical Support:
Rayon Technology provides technical assistance via email and phone. Updated drivers, manuals, and product documentation are available on the company’s website.

Maintenance:
- Periodic inspection of connectors and contacts recommended for industrial environments.
- Ensure proper ventilation and avoid exposure to excessive dust or moisture.
- Firmware and driver updates should be applied as released to maintain compatibility and performance.

Product Family and Related Models:
The AP2T2-2 belongs to Rayon’s AP1T2 series of PCI sharer cards. Related models include:
- AP1T2/1: RS232 interface version
- AP1T2/2: RS422/RS485 interface version (equivalent to AP2T2-2)
- AP1T2/3: RS232/RS422/RS485 selectable version

Performance Upgrade Options:
Rayon offers a range of related PCI communication cards for expanded functionality:
- AP102-I: Two ground-isolated RS232 ports
- AP132-I: Two ground-isolated RS422/RS485 ports
- AP301-I: One RS232 and one ground-isolated RS232/422/485 port
- APLOG301-I: Monitored RS232 to ground-isolated RS232/422/485 converter via dual serial ports
- AP112-I: Two ground-isolated RS232/RS422/RS485 ports
- AP132: Two RS422/RS485 ports (non-isolated)
- APCON301-I: RS232 to ground-isolated RS232/RS422/RS485 converter

Manufacturer’s Note:
All product names and trademarks are the property of their respective owners. Rayon Technology Co., Ltd. reserves the right to modify specifications without prior notice to improve product performance or compatibility.

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### Summary

The Rayon AP2T2-2 PCI 1-Port RS422/485 Shared Port Card (5V Only) is a robust, industrial-grade communication interface designed for systems requiring reliable serial connectivity. Its shared-port architecture, flexible interface configuration, and broad OS compatibility make it ideal for industrial automation, control systems, and embedded applications. With automatic PCI resource allocation, DIP switch configurability, and support for standard RS422/RS485 communication protocols, the AP2T2-2 delivers dependable performance in demanding environments.

Its compact design, optional low-profile bracket, and compatibility with legacy 5V PCI slots ensure seamless integration into both new and existing systems. Supported by Rayon Technology’s extensive product ecosystem and technical support, the AP2T2-2 represents a versatile and cost-effective solution for industrial serial communication needs.