Comprehensive Product Summary – AP1T2-I-2 PCI Isolated 1-Port RS422/485 Dual Mirror Card (5V Only)

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### 1. Product Overview

Product Name: PCI Isolated 1-Port RS422/485 Dual Mirror Card (5V Only)
Model: AP1T2-I-2
Series: AP1T2 Advanced PCI Sharer Card Series
Article Number: AP1T2-I-2
Manufacturer: Rayon Technology Co., Ltd.
Manufacturer Address: 2F, No. 177, Chung Shan 2 Rd., Lu Chou City, Taipei Hsien, Taiwan
Contact Information:
- Tel: +886-2-82858362
- Fax: +886-2-82857065
- Email: rayon@ms1.hinet.net / info@rayontech.com.tw
- Websites: [www.rayontech.com.tw](http://www.rayontech.com.tw), [www.computex.com.tw/rayon](http://www.computex.com.tw/rayon)

The AP1T2-I-2 is a PCI-based isolated serial communication card designed to provide a single COM port that can be mirrored across two RS422/RS485 interfaces. It is engineered for industrial control, automation, and communication systems requiring robust, isolated, and configurable serial connectivity. The card operates exclusively on a 5V PCI bus and supports a wide range of operating systems, including multiple versions of Windows and Linux.

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### 2. Key Features

- Dual Mirrored Serial Ports:
Provides two RS422/RS485 ports that mirror a single COM port, enabling simultaneous communication in poll-and-acknowledge (Poll & Ack) environments.

- Flexible Interface Configuration:
Each connector can be independently configured via DIP switches to operate as RS232, RS422, or RS485, depending on the model variant.

- High Compatibility:
Fully compatible with ASIX MCS9865 serial communication controller, ensuring stable performance and broad driver support.

- Plug & Play PCI Interface:
Automatic I/O, memory, and IRQ mapping assigned by the PCI BIOS, simplifying installation and system integration.

- Industrial-Grade Design:
Designed for industrial control applications, offering reliable operation under demanding environmental conditions.

- Wide OS Support:
Compatible with Windows 2000, XP, Vista, Windows 7/8, and Linux, ensuring flexibility across legacy and modern systems.

- Compact Form Factor:
Standard PCI card dimensions of 100 × 97 mm, with optional low-profile brackets available upon request.

- Single Voltage Operation:
Operates exclusively on 5V PCI slots, ensuring stable power delivery and compatibility with standard PCI architectures.

- High-Speed Communication:
Supports baud rates from 50 to 115,200 bps, suitable for a wide range of serial communication applications.

- Dual DB9 Connectors:
Equipped with two DB9 male connectors, providing robust and standardized physical interfaces for serial communication.

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### 3. Technical Specifications

Controller Chip: ASIX MCS9865 (16950A compatible)
Bus Interface: PCI (5V or 3.3V slot compatible, 5V operation only for AP1T2-I-2)
Number of Ports: 1 logical COM port mirrored to 2 physical connectors
Interface Types: RS422 / RS485 (model AP1T2-I-2)
Baud Rate Range: 50 bps to 115,200 bps
Connector Type: 2 × DB9 male connectors
Dimensions: 100 mm (L) × 97 mm (W)
Bracket Options: Standard PCI bracket; low-profile bracket available on request
Power Requirement: 5V only
Isolation: Ground isolation between ports and system bus (model dependent)
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)
Material: Industrial-grade PCB with reinforced connectors and EMI shielding
Weight: Approx. 80–100 g (typical for standard PCI card of this size)

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### 4. Functionality

The AP1T2-I-2 functions as a PCI serial communication interface card that allows a single COM port to be shared across two physical RS422/RS485 connectors. This “dual mirror” configuration enables two devices to communicate with the same host COM port simultaneously, which is particularly useful in poll-and-acknowledge (Poll & Ack) communication schemes commonly used in industrial automation and control systems.

Each connector can be configured via DIP switches to operate in RS422 or RS485 mode, providing flexibility for different serial communication standards. The card’s ASIX MCS9865 controller ensures reliable data transmission, hardware flow control, and compatibility with standard serial communication protocols.

Typical Use Cases:
- Industrial automation and control systems
- Data acquisition and monitoring
- SCADA (Supervisory Control and Data Acquisition) systems
- Machine-to-machine (M2M) communication
- Embedded system integration
- Serial device networking and expansion
- Communication between PLCs, sensors, and controllers

Compatibility:
- PCI bus systems supporting 5V signaling
- Operating systems: Windows 2000, XP, Vista, Windows 7/8, Linux, SCO Unix
- Compatible with legacy and modern industrial PCs

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### 5. Components & Accessories

Included Components:
- 1 × AP1T2-I-2 PCI card
- 2 × DB9 male connectors (on-board)
- 1 × Standard PCI bracket (pre-installed)
- 1 × User manual or quick installation guide
- 1 × Driver CD or downloadable driver package (depending on distribution)

Optional Accessories:
- Low-profile PCI bracket (for compact or rackmount systems)
- RS422/RS485 communication cables
- DB9-to-terminal block adapters for field wiring
- Additional isolation modules (for extended protection in high-noise environments)

Connectors:
- DB9 Male (x2): Each connector supports RS422/RS485 signaling.
- PCI Edge Connector: Standard 32-bit PCI interface, keyed for 5V operation.

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### 6. Installation & Setup

System Requirements:
- Available PCI slot (5V or 3.3V physical slot, 5V operation required)
- Compatible operating system (Windows 2000/XP/Vista/7/8 or Linux)
- Administrative privileges for driver installation

Installation Steps:
1. Power off the host computer and disconnect it from the power source.
2. Insert the AP1T2-I-2 card into an available PCI slot.
3. Secure the card using the bracket screw.
4. Reconnect power and boot the system.
5. The PCI BIOS automatically assigns I/O addresses, memory mapping, and IRQs.
6. Install the appropriate driver software (from CD or manufacturer’s website).
7. Configure the DIP switches to select RS422 or RS485 mode for each connector.
8. Connect serial devices using DB9 cables or adapters.
9. Verify communication using terminal software or diagnostic utilities.

Configuration Options:
- DIP Switch Settings:
Each port can be independently configured for RS422 or RS485 operation.
- COM Port Assignment:
Automatically handled by the PCI BIOS; appears as a standard COM port in the operating system.
- Baud Rate and Communication Parameters:
Configurable via software (50–115,200 bps, parity, stop bits, data bits).

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### 7. Performance & Capabilities

Communication Speed:
Supports baud rates from 50 bps to 115,200 bps, suitable for most industrial and automation applications.

Data Integrity:
Hardware-based flow control and buffering ensure reliable data transmission even under high-load conditions.

Isolation and Noise Immunity:
The isolated design minimizes ground loops and electrical interference, enhancing reliability in electrically noisy environments.

Efficiency:
Low power consumption due to single 5V operation; efficient PCI bus utilization with automatic resource allocation.

Limitations:
- Operates only on 5V PCI slots (not compatible with PCIe or 3.3V-only slots).
- Limited to one logical COM port mirrored across two connectors (not independent ports).
- Maximum baud rate of 115,200 bps may not suit ultra-high-speed serial applications.

Performance Highlights:
- Stable operation across wide temperature and humidity ranges.
- Reliable communication in multi-drop RS485 networks.
- Seamless integration with legacy serial devices and modern control systems.

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### 8. Standards & Compliance

Bus Interface Standard: PCI Local Bus Specification (Rev. 2.2 or later)
Serial Communication Standards:
- RS422 (EIA-422)
- RS485 (EIA-485)
- RS232 (for other AP1T2 variants)

Electrical Compliance:
- 5V signaling level compliance
- Ground isolation (model dependent)
- EMI/RFI shielding for industrial environments

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 CE and FCC Class A industrial standards (typical for Rayon products)
- RoHS-compliant manufacturing process (lead-free soldering and materials)

Industry Standards Supported:
- PCI Plug & Play resource allocation
- Standard COM port driver model for Windows and Linux
- ASIX MCS9865 chipset compatibility ensures adherence to UART 16950A standards

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### 9. Additional Information

Warranty:
Typically covered by Rayon Technology’s standard limited warranty (duration varies by region and distributor). Warranty covers manufacturing defects and hardware failures under normal operating conditions.

Technical Support:
- Email support via info@rayontech.com.tw
- Online resources, driver downloads, and documentation available at www.rayontech.com.tw
- Telephone support during business hours (Taipei time)

Maintenance:
- No periodic maintenance required beyond standard dust removal and connector inspection.
- Firmware and driver updates available from the manufacturer’s website.
- Ensure proper grounding and shielding in installation to maintain isolation integrity.

Product Line Compatibility and Upgrades:
The AP1T2-I-2 belongs to Rayon’s AP-series PCI communication cards, offering various configurations for different serial standards and isolation requirements. Related models include:
- AP102-I: Dual isolated RS232 ports
- AP132-I: Dual isolated RS422/RS485 ports
- AP301-I: One RS232 and one isolated RS232/422/485 port
- APLOG301-I: Monitored RS232 to isolated RS232/422/485 converter
- AP112-I: Dual isolated RS232/RS422/RS485 ports
- AP132: Dual RS422/RS485 ports (non-isolated)
- APCON301-I: RS232 to isolated RS232/RS422/RS485 converter

These models provide scalability and flexibility for system integrators requiring multiple serial communication configurations.

Product Lifecycle and Updates:
The AP1T2-I-2 is part of Rayon’s long-term supported industrial product line, ensuring availability of drivers and replacement parts for extended operational lifespans typical in industrial environments.

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### Summary

The Rayon AP1T2-I-2 PCI Isolated 1-Port RS422/485 Dual Mirror Card is a robust, industrial-grade communication interface designed for systems requiring reliable, isolated serial connectivity. Its dual mirrored port design allows a single COM port to communicate with two devices simultaneously, making it ideal for poll-and-acknowledge communication schemes. With flexible DIP switch configuration, wide OS compatibility, and automatic PCI resource allocation, the AP1T2-I-2 offers a dependable and easily integrated solution for industrial automation, control, and data acquisition systems.

Its combination of ASIX MCS9865 controller, 5V PCI compatibility, and industrial environmental tolerance ensures stable performance and long-term reliability. Supported by Rayon Technology’s comprehensive product ecosystem and technical support, the AP1T2-I-2 stands as a versatile and cost-effective choice for engineers and system integrators seeking high-quality serial communication hardware.