Specifications

Introduction

Thank you for purchasing a RS-422/RS-485 serial card from StarTech.com. Now you can

add four independent RS-422/RS-485 serial ports to your system. You can set each port

as either RS-422 or RS-485 using dip switches right on the card. This flexible card works

in both 3.3 volt and 5 volt PCI slots and uses Automatic Data Direction Control (ADDC)

for more straight-forward control of two-wire half-duplex RS-485 communications. The

PCI4S22DB9 uses a 32-Byte transmit-receive buffer to help reduce the number of CPU

interrupts and improve system performance.

Features

• Adds four high speed RS-422/RS-485 serial ports to your computer

•Works in both 3.3 volt and 5 volt PCI slots

•Allows you to configure each port as RS-422 format or RS-485 format

• Uses ADDC in RS-485 mode for improved communications

• Complies with Universal 32 bit PCI bus and PCI Bus Version 2.2 specifications

• Compatible with most major OS platforms including Windows, Linux and UNIX

•Provides data transfer rates of up to 115 KBytes/sec

• Uses only one IRQ assigned by the PCI BIOS

Before You Begin

To ensure a quick and easy device installation, please read through this section carefully

before attempting to install the device.

Requirements

•Acomputer running Windows XP/2000/NT/Me/98/95, DOS, Linux, or UNIX

(SCO Open Server)

• An open 5 or 3.3 volt PCI slot

Contents

•1 x serial card

•1 x serial cable with DB9 connectors

•Driver disks for Windows, Linux, and Unix

Note: Depending on the driver version, you may also see this referred to as the P485U or

the PCIPORT on the driver disk.