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 Range .......................................................... 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 Programming 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 Input 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 Connections .............................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: You can install up to sixteen USB-4761’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-4761 requires 400mA (Max.).
This
means that if an USB hub is used, it will need 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 applications. 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 V
DC
, 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 Chapter1

1.2 Applications
• Industrial On/Off control
• Switch status sensing
• Digital I/O control
• 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 Chapter1

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 appli-
cation
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 devel-
opment tools:
• Visual C++
• Visual Basic
For instructions on how to begin programming in each development tool,
a
Tutorial Chapter 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 installa-
tion
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 Chapter1

1.5.2 Programming with Device Drivers Function Library
The Device Drivers offer a rich function library that can be utilized in
various application programs.
This function library consists of numerous
APIs that
support many development tools, such as Visual C++, Visual
Basic.
1.5.3 Troubleshooting Device Drivers Error
Driver functions will return a status code when they are called to perform a
certain task for the application. When a function returns a
code that is not
zero, it
means the function has failed to perform its designated function.
To troubleshoot the Device
Drivers error, you can pass the error code to
DRV_GetErrorMessage function to return the error message.
Alternatively,
you can refer to the Device Drivers Error Codes Appendix
in the Device
Drivers Manual for a detailed listing of Error Codes, Error
IDs and the Error
Messages.
USB-4761 User Manual 8

2
2
Installation
This chapter has a package item check-
list,
proper instructions about unpack-
ing and step-by-step procedures
for
both
driver and USB installation..
Sections include:
• Unpacking
• Driver Installation
• Hardware Installation
• Device Setup & Configuration
• Device Testing
• Hardware Uninstallation

Chapter 2 Installation
2.1 Unpacking
After receiving your USB-4761 package, please inspect its contents first.
The
package should contain the following items:
• USB-4761 Module
• Shielded USB 2.0 Cable (1.8 m)
• Companion CD-ROM (DLL driver included)
The USB-4761 Module harbors certain electronic components vulnerable
to
electrostatic discharge (ESD). ESD could easily damage the integrated
circuits and certain components
if preventive measures are not carefully
paid attention to.
Before removing the module from the antistatic plastic
bag, you should take following precautions
to ward off possible ESD
damage:
• Touch the metal part of your computer chassis with your hand to dis-
charge
static electricity accumulated on your body. One can also use a
grounding strap.
• Make contact between the antistatic bag and ground before opening the
bag.
After taking out the module, you should first:
Inspect the module for any possible signs of external damage (loose or
damaged components,
etc.). If the module is visibly damaged, please
notify
our service department or our local sales representative immedi-
ately. Avoid using
a damaged module with your system.
• Avoid physical contact with materials that could hold static
electricity such
as plastic, vinyl and Styrofoam.
USB-4761 User Manual 10

2.2 Driver Installation
We recommend you install the software driver before you install the
USB-4761 module into your system, since
this will guarantee a smooth
installation process.
The 32-bit DLL driver Setup program for the USB-4761 module is
included
on the companion CD-ROM that is shipped with your module
package. Please
follow the steps below to install the driver software:
Step 1: Insert the companion CD-ROM into your CD-ROM drive.
Step 2: The Setup program will be launched automatically if you have
the
auto-play function enabled on your system.
Note: If the auto-play function is not enabled on your
computer, use Windows
Explorer or Windows Run
command to execute Setup.exe
on the companion
CD-ROM.
11 Chapter2

Step3: Click Continue , and select the Installation option
Step4: Select the specific device and then just follow the installation
instructions step by step to complete your device
driver installation and
setup.
For further information on driver-related issues, an online version of the
Device Drivers Manual is
available by accessing the following path:
Start/Programs/Omega USB-4700 Series/ Device Driver’s Manual
2.3 Hardware Installation
Note: Make sure you have installed the software driver
before you install
the module (please refer to
Section 2.2 Driver Installation)
After the DLL driver installation is completed, you can now go on to
install the USB-4761 module in
any USB port that supports the
USB 1.1/2.0 standard, on your computer. It is suggested that you refer to
the computer’s user manual or
related documentation if you have any
doubts. Please
follow the steps below to install the module on your sys-
tem.
Step 1: Touch the metal part on the surface of your computer to neutral-
ize
the static electricity that might be in your body.
Step 2: Plug your USB module into the selected USB port. Hold the mod-
ule only by its edges
Plug the module firmly into place. Use of excessive
force
must be avoided; otherwise the module might get damaged.
Note: In case you installed the module without installing
the DLL driver first,
Windows 2000/XP will recog-
nize your
module as an “unknown device” after
reboot, and
will prompt you to provide necessary
driver. You should ignore the prompting messages
(just click the Cancel button) and set up the driver
according to the steps described
in Section 2.2
Driver Installation.
USB-4761 User Manual 12

Figure 2.2: Device Name on the Device Manager
Note: If your module is properly installed, you should
see the device name of your module listed on the
Device
Manager tab. If you seeyour device name
listed, but
marked with an exclamation sign “!”
, it means your module has not been correctly
installed. In
this case, remove the mod- ule from
Device Manager
by selecting its device name
and
press the Remove button. Then go through
the driver
installation process again.
13 Chapter2

After your module is properly installed with your system, you can now
configure your device
using the Device Manager that has itself already
been installed
on your system during driver setup. A complete device
installation procedure should include
device setup , configuration and
testing . The following sections will guide you through the Setup,
Configuration and Testing of your device.
2.4 Device Setup & Configuration
Device Manager is a utility that allows you to set up, configure and test
your devices, and later stores your settings in the
system registry. These
settings
will be used when you call the APIs of 32-bit DLL drivers.
2.4.1 Setting Up the Device
Step 1: To complete the device setup and configuration procedures, you
must first install the
device along with its driver. (Please refer to the
previous section
of Chapter 2 for detailed installation instructions).
USB-4761 User Manual 14

Step2: You can view the device(s) already installed on your system (if
any)
in the Installed Devices list box. If you haven’t installed any devices,
you
might see a blank list.
Figure 2.4: Device Manager Dialog Box
Note: If you have properly installed the device driver but still
can’t find it
in Device Manager, please close the
Device Manager and restart it.
2.4.2 Configuring the Device
Step 3: Click “ Setup ” button and you will see the “ Device Setting “dialog
box
as follow. On the Device Setting dialog box, you can set the DI inter-
rupt trigger edge and
the power-on DO values.
15 Chapter2