Omega Products OMG-VERSACOMM4-EX Installation Manual

www.omega.com

e-mail: [e-mail]

User’s Guide

OMG-VERSACOMM4-EX

Four Port ISA RS-232 Interface Board

Shop online at

Servicing North America:

USA: One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford CT 06907-0047

TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

®

Customer Service: 1-800-622-2378 / 1-800-622-BEST

®

Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

®

TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico: En Espan˜ ol: [phone]-7803 e-mail: [e-mail]

FAX: [phone] [e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Frystatska 184, 733 01 Karviná, Czech Republic

TEL: [phone] FAX: [phone]
Toll Free: 0800-1-66342 e-mail: [e-mail]

France: 11, rue Jacques Cartier, 78280 Guyancourt, France

TEL: [phone] FAX: [phone]
Toll Free in France: 0800 466 342
e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

TEL: [phone] FAX: [phone]
Toll Free in Germany: 0800 639 7678
e-mail: [e-mail]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

M44 5BD United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

OMEGAnet®Online Service Internet e-mail

www.omega.com [e-mail]

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

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

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

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

JUMPER SELECTIONS.............................................................................4

IRQ Selection........................................................................................4

INTERRUPT MODES................................................................................5

CLOCK MODES........................................................................................6

BAUD RATES AND DIVISORS FOR THE ‘DIV1’ MODE ........................7

BAUD RATES AND DIVISORS FOR THE ‘DIV2’ MODE ........................8

INSTALLATION ..........................................................................9

OPERATING SYSTEM INSTALLATION ................................................. 9

For Window s Users............................................................................9

Other Operating Systems ...................................................................9

SYSTEM INSTALLATION........................................................................9

TECHNICAL DESCRIPTION.......................................................10

FEATURES .............................................................................................. 10

INTERRUPT STATUS PORT .................................................................10

CONNECTOR PIN ASSIGNMENTS........................................................11

DB-25 Male (RS-232 DTE)................................................................11

DB-9 Male (EIA-574 DTE)................................................................11

DB-37 Male.........................................................................................12

SPECIFICATIONS ......................................................................13

ENVIRONMENTAL SPECIFICATIONS..................................................13

MANUFACTURING................................................................................13

POWER CONSUMPTION........................................................................13

MEAN TIME BETWEEN FAILURES (MTBF).....................................13

PHYSICAL DIMENSIONS........................................................................13

APPENDIX A - TROUBLESHOOTING.........................................14

APPENDIX B - HOW TO GET ASSISTANCE ERROR! BOOKMARK NOT

DEFINED

.

APPENDIX C - ELECTRICAL INTERFACE ...................................17

RS-232.....................................................................................................17

APPENDIX D - ASYNCHRONOUS COMMUNICATIONS ...............18

APPENDIX E - SILK-SCREEN ....................................................19

APPENDIX F - COMPLIANCE NOTICES ..........................20

FEDERAL COMMUNICATIONS COMMISSION STATEMENT ............ 22

EMC DIRECTIVE STATEMENT ........................................................... 22

Figures

Figure 1 - Available Address Combinations......................................................2

Figure 2 - Address Selection Table ....................................................................3

Figure 3 - Port to Connector Table.....................................................................3

Figure 4 – Headers J1B – J4B, IRQ Selection................................................4

Figure 5 - Header J1A, Normal IRQ Mode........................................................5

Figure 6 - Header J1A & J2A, Shared IRQ Mode...........................................5

Figure 7 - Clocking Mode ‘Divide By 4’............................................................6

Figure 8 - Clocking Mode ‘Divide By 2’............................................................6

Figure 9 - Clocking Mode ‘Divide By 1’............................................................6

Figure 10 - Asynchronous Communications Bit Diagram..........................18

Introduction

Introduction

Overview

The OMG-VERSACOMM4-EX provides the PC with four RS-232 asynchronous
ports. The OMG-VERSACOMM4-EX 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-VERSACOMM4-EX is shipped with the following items. If any of
these items is missing or damaged, contact the supplier.

• OMG-VERSACOMM4-EX Serial I/O Adapter

• DB-37 to four DB-25 ‘Spider Cable’ (DB-9 Spider Cable is available)

• Software

Factory Default Settings

The OMG-VERSACOMM4-EX factory default settings are as follows:

Port # Base Address IRQ IRQ Mode Clock Divisor

Port 1 280 5 M 4
Port 2 288 5 S 4
Port 3 290 5 S 4
Port 4 298 5 S 4

To install the OMG-VERSACOMM4-EX using factory default settings, refer to
Installation on page 9.

For your reference, record installed OMG-VERSACOMM4-EX settings below:

Port # Base Address IRQ IRQ Mode Clock Divisor

Port 1
Port 2
Port 3
Port 4

OMG-VERSACOMM4-EX Page 1

Card Setup

Card Setup

The OMG-VERSACOMM4-EX contains several jumper straps that must be set
for proper operation.

Address Selection

Each port on the OMG-VERSACOMM4-EX occupies eight consecutive I/O
locations. A DIP-switch is used to set the base address for these locations.

The OMG-VERSACOMM4-EX has a unique addressing scheme that allows it to
be completely compatible with older four port RS-232 interface adapters (p/n
3064, 3065, 3066 and 3400) and provides the ability to select specific non-linear
address combinations (i.e. 3F8, 2F8, 3E8, 2E8).

The first addressing scheme allows the user to select the addresses for its ports
from a table of available address combinations.

The following table shows the addressing combinations available. If different
address combinations are required, please contact Technical Support about
custom PAL options.

Switch 6 Switch 7 Switch 8 Port 1 Port 2 Port 3 Port 4

On On Off 3F8 2F8 3E8 2E8
On Off On 2F8 3E8 2E8 2E0
On Off Off 3E8 2E8 280 288
Off On On 500 508 510 518
Off On Off 580 588 590 598
Off Off On 1500 1508 1510 1518
Off Off Off 3220 3228 4220 4228
On On On Addresses set up by switches 1 - 5

Figure 1 - Available Address Combinations

Note: Each COM: port in the system should have a unique address. Typically

COM1: - COM4: addresses are 3F8, 2F8, 3E8 and 2E8 Hex.

Refer to Appendix A for common address contentions.

OMG-VERSACOMM4-EX Page 2

Card Setup

The second mode of address selection provides the compatibility mode. In this
mode the DIP-switch sets the base address and the adapter occupies 32
consecutive I/O locations. The following table illustrates the location of each
port and its relationship to the other ports.

Note: For switches 1 - 5 to become active, switches 6, 7 & 8 must be set in
the ‘On’ or ‘Up’ position.

Switch Settings

Address lines à A9 A8 A7 A6 A5

Address Selected 1 2 3 4 5

280-29F Off On Off On On

2A0-2BF Off On Off On Off

380-39F Off Off Off On On

1A0-1BF On Off Off On Off

2E0-2FF Off On Off Off Off

Figure 2 - 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 2E0 is selected as a base. Address 2E0 in binary is XX 10 111X XXXX
where X = a non-selectable address bit.

A9 A5

ON

OFF

1 2 3 4 5 6 7 8

Port # Connector Location Address Example (Base=2E0)

1 1 Base+0 2E0-2E7
2 2 Base+8 2E8-2EF
3 3 Base+16 2F0-2F7
4 4 Base+24 2F8-2FF

Figure 3 - Port to Connector Table

OMG-VERSACOMM4-EX Page 3

Card Setup

Jumper Selections

For ease of configuration, the headers are grouped by port. Port one headers
have a ‘J1’ prefix, Port two headers have the ‘J2’ prefix, etc. For example, the
header that controls the Port one IRQ selection is J1B, the header that controls
the Port 2 IRQ selection is J2B. The silk-screen also provides information for
configuring the adapter without the use of the manual. This is particularly useful
in field re-configuration.

IRQ Selection

Headers J1B through J4B select the interrupt request for each serial port. If
COM1: is selected, the corresponding jumper must be on the IRQ4 setting. If
COM2: is selected, the corresponding jumper must be on IRQ3. (This only
applies to the traditional DOS COM: port assignments, in Windows COM1: can
use I/O address 300 and IRQ15 if it is available!)

3 4 5 6 7 1011 12159

Figure 4 – Headers J1B – J4B, IRQ Selection

Note: Most DOS communications software applications default COM3: to IRQ4

and COM4: to IRQ3. This requires the sharing of interrupts between
COM1: and COM3:, and between COM2: and COM4:. While this is the
default, it is not always the preferred setting. Check your software
configuration instructions to determine the most appropriate IRQ
selection.

Any two or more ports can share a common IRQ by placing the jumpers on the
same IRQ setting and setting the appropriate selections at J1A through J4A.
When sharing IRQs, many operating systems (i.e. Windows NT) will require the
location of the Interrupt Status Port (ISP). Please see Page 10 for a description of
the ISP and how it is used.

OMG-VERSACOMM4-EX Page 4