Omega USB-4750 User manual

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User’s Guide
USB-4750
32 Channel Isolated Digital I/O
USB Data Acquisition Module
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USB-4750
32-Channel Isolated
Digital I/O USB Data Acquisition
Module
User Manual

Contents
Chapter 1 Introduction..................................................... 2
1.1 Hardware Features............................................................. 2
1.2 Software Overview............................................................ 3
1.2.1 More on the CD ............................................................. 3
Chapter 2 Installation....................................................... 6
2.1 Unpacking ......................................................................... 6
2.2 Driver Installation ............................................................. 7
2.3 Hardware Installation ........................................................ 9
2.4 Hardware Uninstallation ................................................... 9
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 ......................................................................... 12
3.2 I/O Connectors ................................................................ 12
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..................................... 14
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 ........................................... 16
Appendix A Specifications................................................. 18
A.1 Isolated Digital Input....................................................... 18
A.2 Isolated Digital Output .................................................... 18
A.3 Isolated Counter .............................................................. 18
A.4 General ............................................................................ 18
v Table of Contents

USB-4750 User Manual vi

1
2
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 to sixteen USB-4750’s to a
system
because of the restriction of device
BoardID
Note: The power output of 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 more
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 to 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

2
2
Installation
Sections include:
• Unpacking
• Driver Installation
• Hardware Installation
• Hardware Uninstallation