Comprehensive Product Summary – AP2T1-I-2 PCI Isolated 1-Port RS422/485 Shared Port Card (5V Only)

---

### 1. Product Overview

Product Name: PCI Isolated 1-Port RS422/485 Shared Port Card (5V Only)
Model: AP2T1-I-2
Series: AP1T2 / AP2T1 Industrial PCI Serial Communication Series
Article Number: AP2T1-I-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 AP2T1-I-2 is a PCI-based isolated serial communication card designed to provide one isolated RS422/RS485 port with shared dual-connector access. It is engineered for industrial control, automation, and communication systems requiring robust, noise-immune serial connectivity. The card operates exclusively on a 5V PCI bus and supports plug-and-play configuration through BIOS-assigned I/O, memory, and IRQ mapping. It features a single COM port shared across two DB9 male connectors, each configurable via DIP switches for RS422 or RS485 operation.

---

### 2. Key Features

- Isolated Serial Communication: Provides galvanic isolation for one RS422/RS485 port, ensuring protection against ground loops and electrical noise in industrial environments.
- Shared Port Architecture: Two DB9 male connectors share a single COM port, enabling Poll & Acknowledge (Poll & Ack) communication schemes commonly used in industrial control systems.
- Flexible Interface Configuration: Each connector can be independently configured for RS422 or RS485 operation using onboard DIP switches.
- High Compatibility: Fully compatible with standard PCI bus architecture (5V only) and supports a wide range of operating systems including Windows 2000, XP, Vista, 7, 8, and Linux distributions.
- Plug & Play Operation: Automatic I/O, memory, and IRQ resource allocation by the PCI BIOS simplifies installation and reduces configuration complexity.
- High-Performance UART: Each port integrates an ASIX MCS9865-compatible 16950A UART controller supporting baud rates from 50 to 115,200 bps, ensuring reliable high-speed data transmission.
- Industrial-Grade Design: Built with durable materials and designed for stable operation in environments with temperature ranges from 0°C to 55°C and humidity up to 95% RH.
- Compact Form Factor: Standard PCI card dimensions (75 × 90 mm) with optional low-profile brackets available for space-constrained systems.
- Software Support: Compatible with multiple operating systems and driver frameworks, ensuring broad deployment flexibility across legacy and modern platforms.

---

### 3. Technical Specifications

Electrical & Bus Interface:
- Bus Type: PCI (Peripheral Component Interconnect)
- Bus Voltage: 5V only
- Bus Compatibility: Standard 32-bit PCI slot
- Controller Chip: ASIX MCS9865 (16950A UART compatible)
- I/O Mapping: Assigned automatically by PCI BIOS
- Memory Mapping: Assigned automatically by PCI BIOS
- IRQ Mapping: Assigned automatically by PCI BIOS

Serial Communication Parameters:
- Number of Ports: 1 isolated serial port (shared across two connectors)
- Interface Standards: RS422 / RS485 (selectable per connector)
- Baud Rate Range: 50 bps to 115,200 bps
- Flow Control: Hardware and software flow control supported (depending on driver)
- Isolation: Electrical isolation between PCI bus and serial interface (ground isolation)
- Connector Type: Two DB9 male connectors (shared COM port)
- Signal Configuration: Differential signaling for RS422/RS485

Physical Characteristics:
- Dimensions: 75 mm × 90 mm (AP2T1-I-2 model)
- Bracket Type: Standard PCI bracket; low-profile bracket available on request
- Weight: Approx. 80–100 g (typical, depending on bracket type)
- Material: High-quality PCB with industrial-grade components

Environmental Conditions:
- 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)

---

### 4. Functionality

Operational Concept:
The AP2T1-I-2 functions as a single-port isolated serial communication interface card that allows two physical connectors to share one logical COM port. This design is particularly suited for Poll & Ack communication environments, where a master device polls multiple slave devices sequentially and receives acknowledgments through a shared communication channel.

Interface Configuration:
Each connector can be configured independently via DIP switches to operate in RS422 or RS485 mode. This flexibility allows the card to adapt to various serial communication topologies, including point-to-point (RS422) and multi-drop (RS485) networks.

Use Cases & Applications:
- Industrial automation and process control systems
- SCADA (Supervisory Control and Data Acquisition) networks
- PLC (Programmable Logic Controller) communication interfaces
- Data acquisition and monitoring systems
- Serial device servers and gateways
- Embedded control systems requiring isolated serial communication
- Laboratory instrumentation and test equipment interfacing

Compatibility:
The card supports a wide range of operating systems and driver frameworks, including:
- Microsoft Windows 2000, XP, Vista, 7, 8
- Linux (kernel-level serial driver support)
- SCO UNIX and other compatible operating systems

---

### 5. Components & Accessories

Included Items:
- AP2T1-I-2 PCI card (main unit)
- Standard PCI bracket (pre-installed)
- Driver and documentation CD or downloadable package (depending on distribution)
- Quick installation guide

Optional Accessories:
- Low-profile PCI bracket (for compact chassis)
- RS422/RS485 terminal block adapters (optional, depending on configuration)
- Shielded serial cables (DB9 male-to-female or DB9-to-terminal block)

Connectors:
- Primary Serial Interface: Two DB9 male connectors (shared COM port)
- Internal Connectors: PCI edge connector (gold-plated contacts for reliable signal transmission)

---

### 6. Installation & Setup

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

Installation Procedure:
1. Power off the host computer and disconnect it from the power source.
2. Insert the AP2T1-I-2 card into an available PCI slot, ensuring proper alignment and secure seating.
3. Attach the standard or low-profile bracket as required by the chassis form factor.
4. Reconnect power and boot the system.
5. The PCI BIOS will automatically assign I/O, memory, and IRQ resources.
6. Install the appropriate driver software provided by Rayon Technology or the operating system’s native serial driver.
7. Configure the DIP switches to select RS422 or RS485 mode for each connector.
8. Connect the serial devices using the DB9 connectors.

Configuration:
- DIP switches allow selection between RS422 and RS485 modes.
- Baud rate and communication parameters (data bits, parity, stop bits) are configured via software or driver settings.
- The shared COM port can be used for Poll & Ack communication, ensuring synchronized data exchange between master and slave devices.

---

### 7. Performance & Capabilities

Data Transmission:
- Supports full-duplex (RS422) and half-duplex (RS485) communication modes.
- Reliable data transfer up to 115,200 bps per port.
- Low latency and high signal integrity due to isolated design.

Isolation & Protection:
- Electrical isolation between PCI bus and serial interface prevents ground loops and protects host system from voltage surges.
- Enhanced noise immunity suitable for electrically noisy industrial environments.

Efficiency & Throughput:
- Hardware-based UART (16950A compatible) ensures efficient data buffering and reduced CPU overhead.
- FIFO buffers enhance throughput and minimize data loss during high-speed communication.

Limitations:
- Operates only on 5V PCI slots (not compatible with 3.3V-only PCI or PCIe slots).
- Single COM port shared between two connectors (cannot operate as two independent ports).
- Maximum baud rate limited to 115,200 bps (sufficient for most industrial applications).

---

### 8. Standards & Compliance

Electrical & Interface Standards:
- Compliant with PCI Local Bus Specification (Rev. 2.2 and above)
- RS422 and RS485 interface standards (TIA/EIA-422-B, TIA/EIA-485-A)

Environmental & Safety Compliance:
- Designed for industrial operating conditions (0°C–55°C, up to 95% RH)
- Manufactured using RoHS-compliant materials (lead-free PCB and components)

Software & Driver Compliance:
- Compatible with standard serial communication APIs and driver models under Windows and Linux
- Supports standard COM port enumeration and configuration

Quality & Manufacturing Standards:
- Produced under ISO-certified manufacturing processes by Rayon Technology Co., Ltd.
- All trademarks and product names are the property of their respective owners.

---

### 9. Additional Information

Warranty:
- Standard manufacturer warranty (typically 1 year, depending on region and distributor) covering defects in materials and workmanship.

Technical Support:
- Direct technical assistance available via email (info@rayontech.com.tw)
- Online resources, driver downloads, and documentation available on the manufacturer’s website.

Maintenance:
- No regular maintenance required beyond standard dust removal and connector inspection.
- Firmware and driver updates available periodically to ensure compatibility with new operating systems.

Product Line Compatibility & Upgrades:
The AP2T1-I-2 belongs to Rayon’s family of industrial PCI serial communication cards. Related models include:
- AP102-I: PCI card supporting two ground-isolated RS232 ports.
- AP132-I: PCI card supporting two ground-isolated RS422/RS485 ports.
- AP301-I: PCI card supporting one RS232 and one ground-isolated RS232/422/485 port.
- APLOG301-I: PCI card supporting monitored RS232 to ground-isolated RS232/422/485 conversion.
- AP112-I: PCI card supporting two ground-isolated RS232/RS422/RS485 ports.
- AP132: PCI card supporting two RS422/RS485 ports (non-isolated).
- APCON301-I: PCI card supporting RS232 to ground-isolated RS232/RS422/RS485 ports.

Longevity & Reliability:
The AP2T1-I-2 is designed for long-term industrial deployment, offering stable performance, robust isolation, and compatibility with legacy and modern systems. Its shared-port design optimizes resource utilization in multi-device communication environments, making it a cost-effective solution for industrial automation and control applications.

---

### Summary

The Rayon AP2T1-I-2 PCI Isolated 1-Port RS422/485 Shared Port Card (5V Only) is a high-reliability industrial communication interface designed for systems requiring isolated, noise-resistant serial connectivity. With its shared-port architecture, flexible DIP-switch configuration, and robust ASIX MCS9865 controller, it delivers dependable performance across a wide range of industrial and automation applications. Its plug-and-play PCI integration, broad OS compatibility, and optional low-profile form factor make it an adaptable and future-proof solution for engineers and system integrators seeking reliable serial communication in demanding environments.