Omega Engineering USB-4761 User Manual

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User’s Guide

USB-4761

8 Channel Relay/Isolated DI

USB Data Acquisition Module

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USB-4761

8-channel Relay / Isolated DI
USB Data Acquisition Module

User Manual

Contents

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

1.1 Features ............................................................ ................. 2

1.1.1 Robust Protection ........................................................... 3

1.1.2 Wide Input Rang e ........ ............................. ..................... 3

1.1.3 Reset Protection for Industrial Applications .................. 3

1.1.4 Plug & Play Function ..................................................... 3

1.2 Applications ...................................................................... 4

1.3 Installation Guide .............................................................. 4

Figure 1.1:Installation Flow Chart ................................. 5

1.4 Software Overview............................................................ 6

1.4.1 Prog ramming Choices for DA&C Module: ........ ........... 6

1.4.2 Device Drivers ............................................................... 6

1.5 Device Driver Programming ............................................. 7

1.5.1 Programming Tools ....................................................... 7

1.5.2 Programming with Device Drivers Function Library .... 8

1.5.3 Troubleshooting Device Drivers Error .......................... 8

Chapter 2 Installation ..................................................... 10

2.1 Unpacking ................................................................. ...... 10

2.2 Driver Installation ........................................................... 11

Figure 2.1: Software Setup .......................................... 11

2.3 Hardware Installation ...................................................... 12

Figure 2.2:Device Name on the Device Manager ..... .. . 13

Figure 2.3:The (!) Indicates Improper Installation ...... 14

2.4 Device Setup & Configuration ........................................ 14

2.4.1 Setting Up the Device .................................................. 14

Figure 2.4:Device Manager Dialog Box ...................... 15

2.4.2 Configuring the Device ............................... ................. 15

Figure 2.5:The Device Setting Dialog Box ................. 16

2.5 Device Testing................... ... ...... ...... ..... ...... ..... ... ...... ... ... 16

2.5.1 Testing Digital Input Function ..................................... 17

Figure 2.6:Digital In put Tab in Device Test Dialog .... 17

2.5.2 Testing Digital Output Function .................................. 17

Figure 2.7:Digital Output Tab in Device Test Dialog . 18

2.6 Hardware Uninstallation ................................................. 18

Figure 2.8:Unplug or Eject Hardware Dialog .............. 19

Figure 2.9:Stop a Hardware device dialog box ............ 19

Chapter 3 Signal Connections ........................................ 22

3.1 Overview ............................................................. ............ 22

3.2 I/O Connectors ................................................................ 22

3.2.1 Pin Assignment ............................................................ 22

Figure 3.1:I/O Connector Pin Assignment .................. 23

3.2.2 I/O Connector Signal Description ................................ 24

v Table of Contents

Table 3.1:I/O Connector Signal Description ............... 24

3.2.3 LED Indicator Status Description .............................. .. 24

Table 3.2:LED Indicator Status Description ................ 24

3.3 Isolated Digital Input Connections.................................. 25

3.3.1 Single-ended Channel Connect ions ............................. 25

Figure 3.2:Isolated Digital Input Connections ............. 25

3.4 Relay Connections...................... ... ..... ... ......... ..... ... ...... ... 25

Figure 3.3:Relay Output Channel Connections ........... 25

3.5 Field Wiring Considerations ........................................... 26

Appendix A Specifications ................................................. 28

A.1 Isolated Digital Input....................................................... 28

A.2 Relay Output ................................................................... 28

A.3 General ............................................................. ............... 29

Appendix B Function Block............................................... 32

USB-4761 User Manual vi

1

2

Introduction

This chapter will provide information
on the features of the

DAS module, a

quick start

guide for installation, and
some brief information on software and
accessories for the USB-4761

Module.

Sections include:

• Features

• Applications

• Installation Guide

• Software Overview

• Device Driver Programming

Chapter 1 Introduction

Thank you for buying the USB-4761 data acquisition module.

The

USB-

4761 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 Features

USB-4761 has the most requested measurement & control functions:

• 8 relay output (Form C) and 8 isolated digital input channels

• LED indicators to show activated relays

• High-voltage isolation on input channels (2,500 VDC)

• High ESD protection (2,000 VDC)

• Wide input range (5 ~ 30 VDC)

• Interrupt handling capability

• Bus-powered

• Wiring terminal on Modules

Note:

Y o u ca n inst al l up to sixteen USB-4761’ s to a

system

because of the restriction of device

BoardID

Note:

The power ou tput of an USB port is 50 0 mA,

while the USB-4761 requires 400mA (Max.).

This
means that if an US B hub is used, it w ill ne ed an
external power supply

to support more than one

USB-4761 device.

USB-4761 User Manual 2

1.1.1 Robust Protection

The USB-4761 digital input channels feature a robust isolation protection
for industrial,

lab and machinery automation app licat i ons. It durably

withstands voltage up to

2,500 VDC, preventing your host system from

any incidental

harms. If connected to an external input source with surge

protection, the USB-4761 can

offer up to a maximum of 2,000 VDC ESD

(Electrostatic Discharge) protection.

1.1.2 Wide Input Range

The USB-4761 has a wide range of input voltage from 5 to 30 VDC, and it
is

suitable for most industrial applications with 12 and 24 V

DC

input volt-

age.

1.1.3 Reset Protection for Industrial Applications

When the system has undergone a hot reset (i.e. without turning off the
system power), USB-4761

can either retain outputs values of each chan-

nel, or

return to its default configuration as open status, depending on its

onboard jumper setting. This function protects the system

from wrong

operations during unexpected system

resets.

1.1.4 Plug & Play Function

USB-4761 is a portable Plug-&-Play device that fully complies with the
USB 1.1/2.0 specification. During module installation, all bus-related
configurations such as

base I/O address and interrupts are conveniently

taken care of

by the Plug-&-Play function. You have virtually no need to

set any jumpers

or

DIP switches.

Note: For detailed specifications of USB-4761, please

refer

to Appendix A, Specifications.

3 Chapter 1

1.2 Applications

• Industrial On/Off control

• Switch status sensing

• Digital I/O cont r ol

• Industrial and lab automation

• SMT/PCB machinery

• Semi-conductor machinery

• PC-based Industrial Machinery

• Testing & Measurement

• Laboratory & Education

• External relay driving

1.3 Installation Guide

Before you install your USB-4761 module, please make sure you have
the following necessary

components:

• USB-4761 DAS Module

• Shielded USB 2.0 cable (1.8 m)

• Driver software DLL drivers (included in the companion
CD-ROM)

• Personal computer or workstation with a USB port (running Windows
2000, or XP)

After you have the necessary components and maybe some accessories
for enhanced

operation of your USB DAS module, you can then begin the

installation procedure. Figure

1.1 on the next page provides a concise

flow chart

to give a broad picture of the software and hardware installa-

tion procedures.

USB-4761 User Manual 4

Figure 1.1: Installation Flow Chart

5 Chapter 1

1.4 Software Overview

OMEGA offers a rich set of DLL drivers, third-party driver support and
application software

to help fully exploit the functions of your USB-4761

module:

• Device Drivers (on the companion CD-ROM)

1.4.1 Programming Choices for DA&C Module:

You may use the application software like the Device Drivers. On the
other hand, advanced

users are allowed to use register- level

programming

as another option, although this is not recommended due

to its laborious and time-consuming

nature.

1.4.2 Device Drivers

The Device Drivers software is included on the companion CD-ROM.
The

Device Drivers features a complete I/O function library to help boost

your application performance. The Device Drivers for Windows

2000/XP
works seamlessly with development tools such as Visual C++, Visual
Basic.

USB-4761 User Manual 6

1.5 Device Driver Programming

This section will provide a roadmap to demonstrate how to build an appli­cation

from scratch using the Device Drivers with your favorite

development

tools such as Visual C++, Visual Basic. The step-by-step

instructions on

how to build your own applications using each

development tool will be given

in the Device Drivers Manual. Moreover,

a rich

set of example source code is also given for your reference.

1.5.1 Programming Tools

Programmers can develop application programs with the following devel­opment tools:

• Visual C++

• Visual Basic
For instructions on how to begin programming in each development tool,

a

Tutorial Cha pter in the Device Drivers Manual is included for your

reference. Please

refer to the corresponding sections in this chapter 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 installa­tion

folder such as the default installation path:

C:/Program Files/Omega/USB-4700/Examples

For information about using other function groups or other development
tools, please refer to

Creating Windows 2000/XP Applications with

Device Drivers

chapter and the Function Overview

chapter in the Device

Drivers Manual.

7 Chapter 1