Omega Products OMG-VERSA-COMM4 Installation Manual

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User’s Guide

OMG-VERSA-COMM4

Four Port ISA RS-232 Interface Board with
Extended “AT” Interrupts

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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

FACTORY DEFAULT SETTINGS ............................................................1

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

ADDRESS SELECTION .............................................................................2

PORT ENABLE / DISABLE.......................................................................4

IRQ SELECTION.......................................................................................4

INTERRUPT MODE OPTIONS................................................................5

INSTALLATION..........................................................................7

OPERATING SYSTEM INSTALLATION.................................................7

For Windows Users.............................................................................7

Other Operating Systems....................................................................7

TECHNICAL DESCRIPTION.........................................................8

FEATURES.................................................................................................8

CONNECTOR PIN ASSIGNMENTS...........................................................9

RS-232....................................................................................................9

SPECIFICATIONS......................................................................10

ENVIRONMENTAL SPECIFICATIONS..................................................10

MANUFACTURING.................................................................................10

POWER CONSUMPTION........................................................................10

MEAN TIME BETWEEN FAILURES (MTBF)......................................10

PHYSICAL DIMENSIONS........................................................................10

APPENDIX A - TROUBLESHOOTING.........................................11

APPENDIX B - HOW TO GET ASSISTANCE

APPENDIX C - ELECTRICAL INTERFACE..................................14

RS-232.....................................................................................................14

APPENDIX D - ASYNCHRONOUS COMMUNICATIONS...............15

APPENDIX E - SILK-SCREEN ....................................................16

APPENDIX F - SCHEMATIC .......................................................17

APPENDIX G - COMPLIANCE NOTICES ....................................19

FEDERAL COMMUNICATIONS COMMISSION STATEMENT............19

EMC DIRECTIVE STATEMENT...........................................................19

Figures

Figure 1 - Address Selection Table.....................................................................2

Figure 2 - DIP-Switch Illustration ......................................................................2

Figure 3 - Headers E1, E2, E3, and E4 .................................................................4

Figure 4 - Header E5, Normal IRQ Mode ...........................................................5

Figure 5 - Header E5, Shared IRQ Mode............................................................5

Figure 6 - Header E5, Sharing IRQ’s with another adapter...........................6

Figure 7 - IRQ Headers E1 - E5 (Factory Default)............................................6

Figure 8 - Connector Pin Assignments .............................................................9

Figure 9 - Asynchronous Communications Bit Diagram............................ 15

Introduction

Introduction

Overview

The OMG-VERSA -COMM4 provides the PC with four RS-232
asynchronous ports. The OMG-VERSA-COMM4 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-VERSA -COMM4 is shipped with the following items. If any of
these items are missing or damaged, contact the supplier.

• OMG-VERSA-COMM4 Serial I/O Adapter

• “Spider” Cable providing 4 DB-25 connectors.

• Software

Factory Default Settings

The OMG-VERSA -COMM4 factory default settings are as follows:

Port # Base Address IRQ

Port 1 3F8 4
Port 2 2F8 3
Port 3 3E8 4
Port 4 2E8 3

To install the OMG-VERSA -COMM4 using factory default settings, refer
to the Installation section of this manual.

For your reference, record installed OMG-VERSA-COMM4 settings below:

Port # Base Address IRQ

Port 1
Port 2
Port 3
Port 4

OMG-VERSA -COMM4 Page 1

Card Setup

Card Setup

The OMG-VERSA -COMM4 contains several jumper straps which must be
set for proper operation.

Address Selection

Each port on the OMG-VERSA-COMM4 occupies 8 consecutive I/O
locations. A DIP-switch is used to set the base address for these locations.
Be careful when selecting the base address as some selections conflict with
existing ports. The following table shows several examples that typically do
not cause a conflict. SW4 sets the I/O address for port 1, SW3 sets the
address for port 2, SW2 sets the address for port 3 and SW1 sets the
address for port 4.

Address Binary Switch Position Setting

Hex A9 A0 1 2 3 4 5 6 7

280-287 1010000XXX Off On Off On On On On
2A0-2A7 1010100XXX Off On Off On Off On On
2E8-2EF 1011101XXX Off On Off Off Off On Off
2F8-2FF 1011111XXX Off On Off Off Off Off Off
3E8-3EF 1111101XXX Off Off Off Off Off On Off
300-307 1100000XXX Off Off On On On On On
328-32F 1100101XXX Off Off On On Off On Off
3F8-3FF 1111111XXX Off Off Off Off Off Off Off

Figure 1 - Address Selection Table

The following illustration shows the correlation between the DIP-switch
setting and the address bits used to determine the base address. In the
example below, address 300 is selected as a base. Address 300 in binary is
XX11 0000 0XXX where X = a non-selectable address bit.

ENA3A9

ON

1 2 3 4 5 6 7 8

Figure 2 - DIP-Switch Illustration

Note: Setting the switch "On" or "Closed" corresponds to a "0" in the

address, while leaving it "Off" or "Open" corresponds to a "1".

OMG-VERSA -COMM4 Page 2

Card Setup
Refer to Appendix A for common address contentions.

OMG-VERSA -COMM4 Page 3