Omega USB-4750 Manuel utilisateur

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User’s Guide

USB-4750

32 Channel Isolated Digital I/O

USB Data Acquisition Module

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It is the policy of OMEGA Engineering, Inc. 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.

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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, human applications.

USB-4750

32-Channel Isolated

Digital I/O USB Data Acquisition

Module

User Manual

Contents

Chapter 1 Introduction..................................................... 2

1.1

Hardware Features.............................................................

1.2

Software Overview............................................................

1.2.1 More on the CD ............................................................. 3

Chapter 2 Installation....................................................... 6

2.1

Unpacking

.........................................................................

2.2

Driver Installation

.............................................................

2.3

Hardware Installation

........................................................

2.4

Hardware Uninstallation

...................................................

Figure 2.1:Unplug or Eject Hardware Dialog ..............10

Figure 2.2:Stop a Hardware device dialog box ............ 10

Chapter 3 Signal Connections........................................ 12

3.1

Overview

.........................................................................

3.2

I/O Connectors

................................................................

3.2.1 Pin Assignments ..........................................................12

Figure 3.1:I/O Connector Pin Assignment ..................12

3.2.2 I/O Connector Signal Description ................................13

Table 3.1:I/O Connector Signal Descriptions ..............13

3.2.3 LED Indicator Status Description ................................ 13

Table 3.2:LED Indicator Status Description ................13

3.3

Isolated Digital I/O

Connections.....................................

3.3.1 Dry/Wet Contact Support for Digital Input .................14

Figure 3.2:Isolated Digital Input Connections .............14

3.3.2 Isolated Digital Output Connections ............................ 15

Figure 3.3:Isolated Digital Output Connections .......... 15

3.4

Field Wiring

Considerations

...........................................

Appendix A Specifications................................................. 18

A.1

Isolated Digital Input.......................................................

A.2

Isolated Digital Output

....................................................

A.3

Isolated Counter

..............................................................

A.4

General

............................................................................

v Table of Contents

USB-4750 User Manual vi

Introduction

Sections include:

•

Hardware Features

•

Software Overview

Chapter 1 Introduction

Thank you

for buying the USB-4750

data acquisition

mod- ule.

The

USB-4750 is

a powerful data acquisition (DAS) module for the

USB port.

It features a unique

circuit

design

and

complete functions for data

acquisition and control.

1.1 Hardware Features

USB-4750 features excellent measurement &

control functions:

•

32 isolated digital

input/output

channels

•

High-voltage

isolation up to

2,500 VDC on

all

channels

•

Dry/wet contact

support

•

Interrupt handling

capability

•

High-sink current

for

isolated

output channels (100mA max./Channel)

•

Digital output

value retained

after hot

system reset

•

Programmable Power-Up

States for output

channels

•

Wiring ternimals on module

Note:

You can install up

sixteen

USB-4750’s to a

system

because

of the restriction of device

BoardID

Note:

The power output

an USB port is 500 mA,

while

the

USB-4750 requires 350 mA

(Max.).

This means that if an USB hub is used,

it will

need

an external power supply

to support

than one

USB-4750 device.

Note:

For detailed specifications of

USB-4750,

please

refer

to Appendix A,

Specifications.

USB-4750 User Manual 2

1.2 Software Overview

Omega offers a rich set of DLL drivers, third-party

driver support

and

application software

on the companion

CD-ROM to help fully exploit the

functions

of your device. The

Device Drivers feature a

complete I/O

function library to help boost your application performance and work

seamlessly with development tools such as Visual C++, Visual

Basic,

1.2.1 More on the CD

For instructions on

how

begin programming in each

development tool,

some tutorial chapters are included in the Device Drivers Manual

for your

reference. Please

refer to

the

corresponding sections in

these

chapters on

the Device

Drivers Manual

to begin

your

programming efforts. You can

also look at

the example source code provided for each

programming tool,

since they can

get you very well

oriented.

The Device Drivers Manual

can

be found

on the companion CD-ROM.

Alternatively, if

you have already

installed the Device

Drivers

on your

system, The

Device Drivers Manual

can

be readily

accessed through the

Start button:

Start/Programs/Omega USB-4700 Series/ Device Driver’s

Manual

The example

source code can be

found under the corresponding installa-

tion

folder such as the

default installation path:

ProgramFiles/Omega/USB-4700/Examples

3 Chapter1

USB-4750 User Manual 4

Installation

Sections include:

•

Unpacking

•

Driver Installation

•

Hardware Installation

•

Hardware Uninstallation

Table des matières

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