User guide

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Introduction

1.9 C485 Features

The C485 is an enhanced four-port serial communication PCI card that in-

cludes an advanced PGA to support the serial communication controller and a

37-pin connector to connect external I/O port. The expansion cable has four

standard DB9/25 connectors and one DB37 connector to connect to the C485

interface card.

• PCI Rev.2.1 Plug and Play

• Automatic IRQ and I/O address assignments

• 4 communication port intelligent buffers

• Suitable for modems, data display, data collection, telecommunication

• Supports up to 2 cards/8 ports per system

• Supports Windows 98/2000/XP/NT and Linux operation systems

• Isolated RS-422/485 interface for each port independently

1.A C485 Specifications

♦ PCI Spec.2.1compliant

♦ Serial communication controller:

• 16C550A compatible

• 1.8432 - 7.3728MHz

♦ System IO mapping:

• Assigned by PCI BIOS

• Shared IRQ

♦ Flow control:

• Xon/Xoff control

• RTS/CTS control

♦ Port Capability:

• 4 isolated RS-422/485 port with 500Vdc isolation voltage

• Max. port per system: 8 Ports (2 cards)

♦ Operation System Compatibility: Windows 98/2000/XP/NT

♦ Connector: DB37 female connector

♦ Cable: External cable with 4 standard DB9/25 male connector