Omega RS232 User Manual

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User’s Guide

OMG-USB-232-1

Single Port RS-232 to USB Adaptor

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It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that
apply. OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.

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

INSTALLATION ..........................................................................2

OPERATING SYSTEM INSTALLATION ................................................. 2

SYSTEM INSTALLATION........................................................................2

TECHNICAL DESCRIPTION.........................................................6

FEATURES ................................................................................................ 6

CONNECTOR PIN ASSIGNMENTS (DB25 MALE).................................6

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

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

MANUFACTURING..................................................................................7

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

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

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

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

APPENDIX B - HOW TO GET ASSISTANCE................................9

APPENDIX C - ELECTRICAL INTERFACE ...................................10

RS-232.....................................................................................................10

APPENDIX D - ASYNCHRONOUS COMMUNICATIONS ...............11

APPENDIX E - COMPLIANCE NOTICES .....................................12

FEDERAL COMMUNICATIONS COMMISSION STATEMENT ............ 12

EMC DIRECTIVE STATEMENT ........................................................... 12

Figure 1 - Asynchronous Communications Bit Diagram.............................11

Introduction

Introduction

Overview

The OMG-USB-232-1 equips the PC with 1 USB to RS-232 Asynchronous serial
port providing a versatile interface for common RS-232 needs (i.e. modem, mouse
and plotter). The advantage of this product over more traditional approaches is
that it doesn’t require opening the computer case, nor does it require resources
such as I/O ports or IRQ’s. It does require a system that supports USB both in
terms of hardware and operating system.

What’s Included

The OMG-USB-232-1 is shipped with the following items. If any of these items
is missing or damaged, contact the supplier.

• OMG-USB-232-1 USB to RS-232 Serial I/O Adapter

• USB Cable Part Number CA179 for Connecting to Upstream

Host/Hub

• Software

• User Manual

OMG-USB-232-1 Page 1

Installation

Installation

Operating System Installation

Choose Install Software at the beginning of the CD and select the Serial I/O
software drivers and inst all SeaCOM.

System Installation

The screen captures below are taken from a Windows ME installation. Your
particular operating system may differ slightly from what is shown based on your
version of Windows.

The OMG-USB-232-1 can be connected to any Upstream Type “A” port either
at the PC host or an Upstream Hub. The OMG-USB-232-1 is hot-pluggable,
meaning there is no need to power down your computer prior to installation. The
OMG-USB-232-1 requires no user hardware configuration since there are no
jumpers present on the card.

1. Connect OMG-USB-232-1 to an Upstream Host or Hub.

This indicates that the system has recognized the new device and will now
proceed to locate a driver.

OMG-USB-232-1 Page 2

Installation

Since you have already installed the software by running “Setup”, simply click
“Next” to proceed. The drivers that were installed during setup will automatically
be used to configure the adapter.

OMG-USB-232-1 Page 3