Advantech USB-4751 User manual

USB-4751/4751L
48/24-Channel Digital
Input/Output USB Module
User Manual

USB-4751/4751L User Manual ii
Copyright
The documentation and the software included with this product are copy-
righted 2009 by Advantech Co., Ltd. All rights are reserved. Advantech
Co., Ltd. reserves the right to make improvements in the products
described in this manual at any time without notice. No part of this man-
ual may be reproduced, copied, translated or transmitted in any form or
by any means without the prior written permission of Advantech Co., Ltd.
Information provided in this manual is intended to be accurate and reli-
able. However, Advantech Co., Ltd. assumes no responsibility for its use,
nor for any infringements of the rights of third parties, which may result
from its use.
Acknowledgements
Intel and Pentium are trademarks of Intel Corporation.
Microsoft Windows and MS-DOS are registered trademarks of
Microsoft Corp.
All other product names or trademarks are properties of their respective
owners.
Part No. 2003475100 1st Edition
Printed in Taiwan July 2009

iii
Product Warranty (2 years)
Advantech warrants to you, the original purchaser, that each of its prod-
ucts will be free from defects in materials and workmanship for two years
from the date of purchase.
This warranty does not apply to any products which have been repaired or
altered by persons other than repair personnel authorized by Advantech,
or which have been subject to misuse, abuse, accident or improper instal-
lation. Advantech assumes no liability under the terms of this warranty as
a consequence of such events.
Because of Advantech’s high quality-control standards and rigorous test-
ing, most of our customers never need to use our repair service. If an
Advantech product is defective, it will be repaired or replaced at no
charge during the warranty period. For out-of-warranty repairs, you will
be billed according to the cost of replacement materials, service time and
freight. Please consult your dealer for more details.
If you think you have a defective product, follow these steps:
1. Collect all the information about the problem encountered. (For
example, CPU speed, Advantech products used, other hardware
and software used, etc.) Note anything abnormal and list any
onscreen messages you get when the problem occurs.
2. Call your dealer and describe the problem. Please have your man-
ual, product, and any helpful information readily available.
3. If your product is diagnosed as defective, obtain an RMA (return
merchandize authorization) number from your dealer. This allows
us to process your return more quickly.
4. Carefully pack the defective product, a fully-completed Repair and
Replacement Order Card and a photocopy proof of purchase date
(such as your sales receipt) in a shippable container. A product
returned without proof of the purchase date is not eligible for war-
ranty service.
5. Write the RMA number visibly on the outside of the package and
ship it prepaid to your dealer.

USB-4751/4751L User Manual iv
CE
This product has passed the CE test for environmental specifications
when shielded cables are used for external wiring. We recommend the use
of shielded cables. This kind of cable is available from Advantech. Please
contact your local supplier for ordering information.
Technical Support and Assistance
Step 1. Visit the Advantech web site at www.advantech.com/support
where you can find the latest information about the product.
Step 2. Contact your distributor, sales representative, or Advantech's cus-
tomer service center for technical support if you need additional
assistance. Please have the following information ready before
you call:
- Product name and serial number
- Description of your peripheral attachments
- Description of your software (operating system, version, appli-
cation software, etc.)
- A complete description of the problem
- The exact wording of any error messages
Document Feedback
To assist us in making improvements to this manual, we would welcome
comments and constructive criticism. Please send all such - in writing to:
[email protected]
Safety Precaution - Static Electricity
Follow these simple precautions to protect yourself from harm and the
products from damage.
1. To avoid electrical shock, always disconnect the power from your
PC chassis before you work on it. Don't touch any components on
the CPU card or other cards while the PC is on.
2. Disconnect power before making any configuration changes. The
sudden rush of power as you connect a jumper or install a card may
damage sensitive electronic components.

v Table of Contents
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
Figure 3.2:Opto-22 CN1/CN2 ..................................... 13
3.2.2 I/O Connector Signal Description ................................ 14
Table 3.1:I/O Connector Signal Description ............... 14
3.2.3 LED Indicator Status Description ................................ 14
Table 3.2:LED Indicator Status Description ................ 14
3.3 Digital I/O Connections .................................................. 15
3.3.1 Dry Contact Support for Digital Input ......................... 15
Figure 3.3:Digital Input Connections .......................... 15
3.4 Field Wiring Considerations ........................................... 16
Appendix A Specifications ................................................. 18
A.1 Digital Input/Output ........................................................ 18
A.2 Counter ............................................................................ 18
A.3 General ............................................................................ 18

USB-4751/4751L User Manual vi

2
CHAPTER
1
Introduction
Sections include:
• Hardware Features
• Software Overview

USB-4751/4751L User Manual 2
Chapter 1 Introduction
Thank you for buying the Advantech’s USB-4751/4751L data acquisition
module. The Advantech USB-4751/4751L 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-4751/4751L features excellent measurement & control functions:
• 48/24 TTL digital I/O lines
• 50-pin Opto-22 compatible box header
• Emulates mode 0 of 8255 PPI
• Buffered circuits for higher driving capacity than 8255
• Interrupt handling
• Timer/ Counter interrupt capability
• Supports both dry and wet contact
• 50-pin Opto-22 compatible box header
• Compatible with USB 1.1/2.0
• Bus-powered
Note: You can install up to sixteen USB-4751/4751L’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-4751/4751L requires 500mA
(Max.). This means that if an USB hub is used, it
will need an external power supply to support
more than one USB-4751/4751L device.
Note: For detailed specifications of USB-4751/4751L,
please refer to Appendix A, Specifications.

3 Chapter1
1.2 Software Overview
Advantech 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. Advantech’s 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,
Inprise C++ Builder, and Inprise Delphi.
1.2.1 More on the CD
For instructions on how to begin programming in each development tool,
Advantech offers some tutorial chapters in the Device Drivers Manual for
your reference. Please refer to the corresponding sections in these chap-
ters on the Device Drivers Manual to begin your programming efforts.
You can also look at the example source code provided for each program-
ming 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/Advantech Automation/Advantech Device Manager /
Device Driver’s Manual
The example source code can be found under the corresponding installa-
tion folder such as the default installation path:
\Program Files\Advantech\ADSAPI\Examples

USB-4751/4751L User Manual 4

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

USB-4751/4751L User Manual 6
Chapter 2 Installation
2.1 Unpacking
After receiving your USB-4751/4751L package, please inspect its con-
tents first. The package should contain the following items:
• USB-4751/4751L Module
• Shielded USB 2.0 Cable (1.8 m)
• Companion CD-ROM (DLL driver included)
• User Manual
The USB-4751/4751L 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.
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.

7 Chapter2
2.2 Driver Installation
We recommend you install the software driver before you install the
USB-4751/4751L module into your system, since this will guarantee a
smooth installation process.
The 32-bit DLL driver Setup program for the USB-4751/4751L module
is included on the companion CD-ROM that is shipped with your module
package. Please follow the steps on the following page to install the
driver software:

USB-4751/4751L User Manual 8
For further information on driver-related issues, an online version of the
Device Drivers Manual is available by accessing the following path:
Start\Programs\Advantech Automation
\Device Manager\Device Driver’s Manual

9 Chapter2
2.3 Hardware Installation
After the DLL driver installation is completed, you can now go on to
install the USB-4751/4751L module in any USB port that supports the
USB 1.1/2.0 standard, on your computer. Please follow the steps below to
install the module on your system.
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. Use of exces-
sive force must be avoided; otherwise the module might get damaged.
After your module is installed, you can configure it using the Advantech
Device Manager. The Device Driver's Manual can be found at:
Start\Programs\Advantech Automation\Advantech Device Man-
ager\Device Driver’s Manual
2.4 Hardware Uninstallation
Though the Advantech USB modules are hot swappable, we still recom-
mend you to follow the hardware un-installation procedure to avoid any
unpredictable damages to your device or your system.
Step1: Close the applications of the USB module.
Step2: Right click the “Unplug or Eject Hardware” icon on your task bar.
Note: Make sure you have installed the software driver
before you install the module (please refer to
Section 2.2 Driver Installation)
Note: In case you installed the module without installing
the DLL driver, Win2000/XP will recognize your
module as an “unknown device”. After reboot,it will
prompt you to provide necessary driver. You should
ignore the prompting messages and set up the
driver according to the steps described in Sec.2.2.

USB-4751/4751L User Manual 10
Figure 2.1: Unplug or Eject Hardware Dialog
Step3: Select “Advantech USB-4751/L Device” and press “Stop” Button.
Figure 2.2: Stop a Hardware device dialog box
Step4: Unplug your USB device from the USB port.
Note: Please make sure that you have closed the application
before unplugging the USB device, otherwise unex-
pected system error or damage may occur.

2
CHAPTER
3
Signal Connections
Sections include:
• Overview
• Digital I/O Connections
• Field Wiring Considerations

USB-4751/4751L User Manual 12
Chapter 3 Signal Connections
3.1 Overview
Maintaining good signal connections is one of the most important factors
in ensuring that your application system is sending and receiving data
correctly. A good signal connection can avoid unnecessary and costly
damage to your PC and other hardware devices.
3.2 I/O Connectors
USB-4751/4751L is equipped with one plug-in screw-terminal connector
and two (one for USB-4751L) standard Opto-22 connectors that can be
used with a variety of Advantech's wiring boards.
3.2.1 Pin Assignments
Figure 3.1: I/O Connector Pin Assignment

13 Chapter3
Figure 3.2: Opto-22 CN1/CN2
Opto-22 CN1 Opto-22 CN2 (USB-4751 Only)
1 PC07 2 GND 1 PC17 2 GND
3PC06 4GND 3PC16 4GND
5PC05 6GND 5PC15 6GND
7PC04 8GND 7PC14 8GND
9 PC03 10 GND 9 PC13 10 GND
11 PC02 12 GND 11 PC12 12 GND
13 PC01 14 GND 13 PC11 14 GND
15 PC00 16 GND 15 PC10 16 GND
17 PB07 18 GND 17 PB17 18 GND
19 PB06 20 GND 19 PB16 20 GND
21 PB05 22 GND 21 PB15 22 GND
23 PB04 24 GND 23 PB14 24 GND
25 PB03 26 GND 25 PB13 26 GND
27 PB02 28 GND 27 PB12 28 GND
29 PB01 30 GND 29 PB11 30 GND
31 PB00 32 GND 31 PB10 32 GND
33 PA07 34 GND 33 PA17 34 GND
35 PA06 36 GND 35 PA16 36 GND
37 PA05 38 GND 37 PA15 38 GND
39 PA04 40 GND 39 PA14 40 GND
41 PA03 42 GND 41 PA13 42 GND
43 PA02 44 GND 43 PA12 44 GND
45 PA01 46 GND 45 PA11 46 GND
47 PA00 48 GND 47 PA10 48 GND
49 +5V_OUT 50 GND 49 +5V_OUT 50 GND

USB-4751/4751L User Manual 14
3.2.2 I/O Connector Signal Description
3.2.3 LED Indicator Status Description
The USB Module is equipped with a LED indicator to show the current
status of the device. When you plug the USB device into the USB port,
the LED indicator will blink five times and then stay lit to indicate that it
is on. Please refer to the following table for detailed LED indicator status
information.
Table 3.1: I/O Connector Signal Description
Signal Ref. Direction Description
PA<0~7,
10~17>
GND Input/Out-
put
Digital input/ output port A, channel
0~7 & channel 10~17.
PB<0~7,
10~17>
GND Input/Out-
put
Digital input/ output port B, channel
0~7 & channel 10~17.
PC<0~7,
10~17>
GND Input/Out-
put
Digital input/ output port C, channel
0~7 & channel 10~17.
+5V_OUT GND Output +5V DC power
C<1,2>_Out GND Output Output pins of counter/ timer 1 and 2
C<1,2>_Gate GND Input Gate control pins of counter/ timer 1
and 2
C<1,2>_In GND Input External clock source of counter/ timer
1 and 2
INT_Out GND Output Interrupt output. This pin changes to
logic 1 whenever the
USB-4751 generates an interrupt, and
returns to logic 0 when the interrupt is
cleared.
GND - - Digital ground
Table 3.2: LED Indicator Status Description
LED Status Description
On Device ready for work
Off Device not ready to work
Slow Blinking (5 times) Device initialization
Fast Blinking
(Depends on data transfer speed).
Device working