Comprehensive Product Summary – SUNIX IPC‑P2004 Universal PCI 4‑Port RS‑422/485 Serial Card

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### 1. Product Overview

Product Name:
UPCI 4×RS‑422/485 Professional Card

Model:
IPC‑P2004

Series:
SUNIX Industrial Multi‑Port Serial Communication Boards – Universal PCI Series

Article Number:
IPC‑P2004

Manufacturer:
SUNIX Co., Ltd.

Product Type:
Professional Universal PCI 4‑Port RS‑422/485 Serial Communication Card

General Description:
The SUNIX IPC‑P2004 is a high‑performance industrial‑grade Universal PCI serial communication card designed to expand a computer’s serial connectivity with four independent RS‑422/485 ports. It supports data rates from 75 bps up to 921.6 kbps and integrates advanced SUNIX proprietary technologies such as AHDC/CS™ (Auto Hardware Direction Control/Carrier Sense) and Auto Detect & Switching for RS‑422/485 modes. The card is 16C750 UART compatible, features a 64‑byte hardware FIFO per port, and provides embedded 15 kV ESD protection. It is engineered for industrial automation, data acquisition, and control applications requiring reliable, low‑latency serial communication.

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### 2. Key Features

- Four Independent RS‑422/485 Ports:
Provides four fully isolated serial channels for industrial communication, each configurable for RS‑422 full‑duplex or RS‑485 half‑duplex operation.

- Universal PCI Interface:
Compliant with PCI versions 3.0/2.3/2.2, supporting both 32‑bit and 64‑bit PCI and PCI‑X buses at 3.3 V or 5 V signaling, 33 MHz/66 MHz operation.

- High‑Speed Data Transmission:
Supports baud rates from 75 bps up to 921.6 kbps per port, suitable for high‑throughput industrial data exchange.

- 64‑Byte Hardware FIFO (16C750 Compatible):
Each port includes a 64‑byte transmit/receive buffer for efficient data handling and reduced CPU overhead.

- SUNIX AHDC/CS™ Technology:
Proprietary Auto Hardware Direction Control with Carrier Sense automatically manages RS‑485 driver enable/disable timing, ensuring precise control of data direction and collision avoidance on 2‑wire buses.

- RS‑422/485 Auto Detect & Switching:
Automatically detects and switches between RS‑422 full‑duplex and RS‑485 half‑duplex modes without jumpers or manual configuration.

- Embedded 15 kV ESD Protection:
Integrated electrostatic discharge protection on all signal lines safeguards connected devices and ensures long‑term reliability.

- Unlimited Scalability:
Multiple IPC‑P2004 cards can be installed in a single system, limited only by available PCI slots.

- Software Flow Control:
Supports XON/XOFF software flow control for reliable data transmission.

- Wide Environmental Tolerance:
Operates from 0 °C to 70 °C, storage –40 °C to 85 °C, humidity 5 % to 95 % RH.

- Comprehensive OS Support:
Compatible with Windows 2000/XP/2003/Vista (32‑/64‑bit), DOS, Linux 2.4/2.6, and SCO OpenServer 5.06/5.07.

- CE and FCC Class B Certified:
Meets international electromagnetic compatibility and safety standards.

- 5‑Year Warranty:
Long‑term manufacturer warranty ensures reliability and support for industrial deployments.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Model | IPC‑P2004 |
| Interface Type | Universal PCI 3.0/2.3/2.2 |
| Bus Compatibility | 64‑/32‑bit PCI and PCI‑X, 3.3 V/5 V, 33 MHz/66 MHz |
| Number of Ports | 4 independent RS‑422/485 ports |
| Connector Type | DB‑44 Female on card |
| Connection Cable | DB‑44 Male → 4 × DB‑9 Male or DB‑25 Male, 40 cm / 100 cm |
| UART Controller | 16C750 compatible, SUNIX Matrix ASIC |
| FIFO Buffer | 64 bytes hardware FIFO per port |
| Baud Rate | 75 bps – 921.6 kbps |
| Data Bits | 5, 6, 7, 8 |
| Stop Bits | 1, 1.5, 2 |
| Parity | None, Even, Odd, Space, Mark |
| Flow Control | XON/XOFF (software) |
| Signal Lines | RS‑422: TxD+, TxD–, RxD+, RxD–, GND