Omega Products OMG-COMM8-PCI Installation Manual

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User’s Guide

OMG-COMM8-PCI

Eight Port PCI RS-232 Interface Board

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The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts
no liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, patient-connected applications.

Contents

INTRODUCTION..........................................................................1

OVERVIEW................................................................................................1

WHAT ’S INCLUDED................................................................................ 1

CARD SETUP ..............................................................................2

CLOCK MODES........................................................................................2

BAUD RATES AND DIVISORS FOR THE ‘DIV1’ MODE ........................3

ADDRESS AND IRQ SELECTION............................................................3

INSTALLATION ..........................................................................4

OPERATING SYSTEM INSTALLATION ................................................. 4

For Windows Users ............................................................................4

Other Operating Systems ...................................................................4

SYSTEM INSTALLATION........................................................................4

TECHNICAL DESCRIPTION.........................................................5

CONNECTOR PIN ASSIG NMENTS..........................................................5

DB-25 (RS-232 DTE) (DB25 MALE)..........................................5

DB-9 (EIA-574 DTE) (DB9 MALE)............................................5

DB-78 CONNECTOR PIN ASSIGNMENTS (DB78 FEMALE)......6

SPECIFICATIONS ........................................................................7

ENVIRONMENTAL SPECIFICATIONS....................................................7

POWER CONSUMPTION..........................................................................7

MEAN TIME BETWEEN FAILURES (MTBF).......................................7

PHYSICAL DIMENSIONS..........................................................................7

APPENDIX A - TROUBLESHOOTING...........................................8

PCI COM NUMBER SELECTION IN WINDOWS 95........................9

APPENDIX B - HOW TO GET ASSISTANCE..............................10

APPENDIX C - ELECTRICAL INTERFACE ...................................11

RS-232.....................................................................................................11

APPENDIX D - ASYNCHRONOUS COMMUNICATIONS ...............12

APPENDIX E - SILK-SCREEN ....................................................13

APPENDIX F - COMPLIANCE NOTICES .....................................14

FEDERAL COMMUNICATIONS COMMISSION STATEMENT ............ 14

EMC DIRECTIVE STATEMENT ........................................................... 14

Figures

Figure 1 - Clocking Mode ‘Divide By 4’............................................................2

Figure 2 - Clockin g Mode ‘Divide By 1’............................................................2

Figure 3 - Asynchronous Communications Bit Diagram.............................12

Introduction

Introduction

Overview

The OMG-COMM8-PCI provides the PC with eight RS-232 asynchronous ports.
The OMG-COMM8-PCI allows for connection to any device utilizing the RS-232
electrical interface, such as modems, data-entry terminals, and plotters.

What’s Included

The OMG-COMM8-PCI is shipped with the following items. If any of these
items is missing or damaged, contact the supplier.

• OMG-COMM8-PCI Serial I/O Adapter

• DB-78 to eight DB-25 ‘Spider Cable’ (DB-9 Spider Cable is

available)

• Serial Utility Software

• User Manual

OMG-COMM8-PCI Page 1

Card Setup

Card Setup

Clock Modes

The OMG-COMM8-PCI employs a unique clocking option that allows the end
user to select from divide by 4 and divide by 1 clocking modes. This mode is
selected at J1.

To select the Baud rates commonly associated with COM: ports (i.e. 2400, 4800,
9600, 19.2, … 115.2K Bps) place the jumper in the divide by 4 mode (silk-screen
DIV4).

DIV1

DIV4

Figure 1 - Clocking Mode ‘Divide By 4’

To select the maximum data rate (460.8K bps) place the jumper in the divide by 1
(silk-screen DIV1) position.

DIV1

DIV4

Figure 2 - Clocking Mode ‘Divide By 1’

OMG-COMM8-PCI Page 2