Omega Engineering OMG-USB-DIO48 Manuel utilisateur

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User’s Guide

OMG-USB-DIO48

48 Channel Digital I/O Interface Board

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It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that

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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.

Content

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

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

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

INDUSTRY STANDARD RELAY RACK CABLES AND OPTIONS.................................1

INSTALLATION.......................................................................................................1

TECHNICAL DESCRIPTION.....................................................................................2

SOFTWARE.......................................................................................................................2

3RD PARTY SOFTWARE SUPPORT ................................................................................2

ELECTRICAL CHARACTERISTICS..................................................................................3

BANKS AND PORTS.........................................................................................................5

SERIAL STRING...............................................................................................................5

50 PIN RIBBON CABLE PIN OUT ....................................................................................6

PROGRAMMING..........................................................................................................7

APPLICATION PROGRAMMERS INTERFACE (API)....................................................7

PRESETTING AN OUTPUT PORT:.................................................................................7

INTERRUPTS:...................................................................................................................7

PORT CONFIGURATION:.................................................................................................8

RELATIVE ADDRESSING VS. ABSOLUTE ADDRESSING..............................................9

SPECIFICATIONS......................................................................................................12

ENVIRONMENTAL SPECIFICATIONS..........................................................................12

POWER CONSUMPTION................................................................................................12

MEAN TIME BETWEEN FAILURES (MTBF).............................................................12

APPENDIX A -TROUBLESHOOTING..................................................................13

APPENDIX B -HOW TO GET ASSISTANCE......................................................14

Manual No. M-3897

APPENDIX C -SILK-SCREEN.................................................................................15

APPENDIX D -COMPLIANCE NOTICES.............................................................16

FEDERAL COMMUNICATIONS COMMISSION STATEMENT....................................16

EMC DIRECTIVE STATEMENT...................................................................................16

FIGURES

Figure 1-Operating Conditions..........................................................................3

Figure 2-Pull Up Resistors .................................................................................4

Figure 3-Bank and Ports.....................................................................................5

Figure 4-50 Pin Header/Ribbon Cable Pin out................................................6

Figure 5-Absolute Byte Address (Same for any configuration)...................9

Figure 6-Relative Byte Address (Only applies to the given configuration)9

Figure 7-Absolute BitAddress (Same for any configuration)....................10

Figure 8-Absolute Bit Address (Same for any configuration)....................11

Figure 9-Bit Relative Address (Print and fill in for your configuration).12

Introduction and Installation

OMG-USB-DIO48 Page 1

Introduction

Overview

The OMG-USB-DIO48 provides six eight-bit ports that may be individually

configured as inputs or outputs.

What’s Included

The OMG-USB-DIO48 is shipped with the following items. If any of these items

is missing or damaged, contact the supplier.

•OMG-USB-DIO48 Adapter

•Software CD

•5V Power Supply

•USB A to B Cable, Part number CA179

Industry Standard Relay Rack Cables and Options

•Part number CA135 forEdge Connection

•Part number CA167 for IDC Connection

•Part number TB07-50 pin terminal block

Installation

For proper operation install software first. To install the software place the CD in

your CD-ROM tray and the auto-run program will start. If auto-run is not

available browse the CD and choose “index.htm”. Choose Install Software at the

beginning of the CD. Select the Digital I/O software drivers and install SeaIO

prior to installing hardware. After installing the software, connect the power

adapter and USB cable to the OMG-USB-DIO48. In the event that the hardware

is installed first, the “Found new hardware wizard” will request a driver disk.

Insert the software CD and browse the SeaIO directory for the “SeaIO.inf” file. A

complete installation of the SeaIO suite is recommended by running setup. When

plugged in the device will light its enable LED once enumerated properly. Be sure

to follow these steps to insure that the

OMG-USB-DIO48 opens and enumerates properly.

Technical

OMG-USB-DIO48 Page 2

Technical Description

The OMG-USB-DIO48 provides 48 channels of digital I/O configurable as inputs

or outputs. Applications include PC based control and automation of sensors,

switches, satellite antenna control systems, video and audio studio automation,

security control systems, and other industrial automation.

Software

The OMG-USB-DIO48 ships with the SeaI/O suite of Windows 98/NT/ME/2000

drivers. SeaI/O provides the user with a consistent and straightforward API,

allowing the developer to concentrate on the details of the application as

opposed to low level driver development. Popular development environments are

supported for application development. SeaI/O includes sample applications and

a utility for configuring the driver parameters under Windows, further simplifying

installation.

3rd Party Software Support

Third party software support for many HMI/MMI and other process control

software is included on the product installation CD. For the most up to date

information on third party software support, please visit http://www.omega.com.

Technical

OMG-USB-DIO48 Page 3

Electrical Characteristics

Figure 1, below provides the electrical characteristics of each Input/Output. Each

port is buffered with a 74ABT245 octal bi-directional transceiver. Each input is

capable of sinking up to 64 mA, while each output can source up to 32 mA. The

OMG-USB-DIO48 requires a 5V power source and is shipped with a 5V power

supply rated at 2.4 A.

Recommended Operating Conditions

Min Max

Input 0 V 5.25 V

Source 32 mA

Sink 64 mA

Electrical Characteristics

High Level Input Voltage Min 2 V

Low Level Input Voltage Max 0.8 V

High Level Output Voltage

Min 2 V at 32 mA

Typically 3.4 V at 3 mA

Low Level Output Voltage Max 0.55 V at 64 mA

Figure 1-Operating Conditions

Technical

OMG-USB-DIO48 Page 4

Pull Ups

Ten pin bussed resistor packs are installed to provide pull-ups to the input ports.

These are installed on all ports. The pull-up resistor packs are rated at 10K ohms.

Figure 2 below provides the bussed resistor and corresponding port. The

resistors insure that no line is floating which is not connected. This provides

consistent biasing on all un-terminated lines.

Bussed

Corresponding

Resistor

Port

RP3 Port A1

RP2 Port B1

RP1 Port C1

RP6 Port A2

RP5 Port B2

RP4 Port C2

Figure 2-Pull Up Resistors

Technical

OMG-USB-DIO48 Page 5

Banks and Ports

The OMG-USB-DIO48 has two 50 pin headers. Each 50 pin header is a bank of

three ports, comprising a total of six eight bit ports. Each port is eight bits wide

and may be configured as an input or output port. Figure 3 below gives the bank

and port organization.

Bank 1 –P2 Bank 2 –P3

Port A1 Port A2

Port B1 Port B2

Port C1 Port C2

Figure 3-Bank and Ports

Serial String

Each device has an eight digit alphanumeric serial string stored in non-volatile

memory. On the Windows platforms, this number is used to give each unit a

separate identity. This identity allows the device to be moved to any USB port or

hub port on your computer while retaining its device number. If a device

becomes damaged and is replaced the new device should be given the same

serial string as the device it is replacing.

This string is stored in an EEPROM along with other critical information. This

EEPROM is read during enumeration. The device should not be unplugged

during its enumeration due to a remote possibility that the data in the EEPROM

could be corrupted if power is removed during a read/write cycle.

The control panel utility provides the capability to read or modify this string.

However, setting the same string for two units will cause the second unit to fail

enumeration, and make it invisible to the operating system. Should this occur,

unplug one unit and set the serial string for the other unit to a different string.

Technical

OMG-USB-DIO48 Page 6

50 pin ribbon cable pin out

Each of the two 50 pin ribbon cable headers has the following pin out as shown

in Figure 4.

Description Pin #

Port A

A0 47

A1 45

A2 43

A3 41

A4 39

A5 37

A6 35

A7 33

Port B

B0 31

B1 29

B2 27

B3 25

B4 23

B5 21

B6 19

B7 17

Port C

C0 15

C1 13

C2 11

C3 9

C4 7

C5 5

C6 3

C7 1

GND All Even pins

+5V 49

Figure 4-50 Pin Header/Ribbon Cable Pin out

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