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USB-4750
32-Channel Isolated
Digital I/O USB Module
User Manual
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Copyright The documentation and the software included with this product are copy- righted 2006 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 accu
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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
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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 Ad
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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 ...............................................................
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USB-4750 User Manual vi
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2 1 Introduction Sections include: • Hardware Features • Software Overview CHAPTER
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Chapter 1 Introduction Thank you for buying the Advantech’s USB-4750 data acquisition mod- ule. The Advantech 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 • I
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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 eac
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USB-4750 User Manual 4
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2 2 Installation Sections include: • Unpacking • Driver Installation • Hardware Installation • Hardware Uninstallation CHAPTER
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Chapter 2 Installation 2.1 Unpacking After receiving your USB-4750 package, please inspect its contents first. The package should contain the following items: • USB-4750 Module • Shielded USB 2.0 Cable (1.8 m) • Companion CD-ROM (DLL driver included) • User Manual The USB-4750 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
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2.2 Driver Installation We recommend you install the software driver before you install the USB-4750 module into your system, since this will guarantee a smooth installation process. The 32-bit DLL driver Setup program for the USB-4750 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: 7 Chapter 2
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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 USB-4750 User Manual 8
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2.3 Hardware Installation Note: Make sure you have installed the software driver before you install the module (please refer to Sec- tion 2.2 Driver Installation) After the DLL driver installation is completed, you can now go on to install the USB-4750 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 if you have any doubts. Please follow the steps below to install the module on y
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Step2: Right click the “Unplug or Eject Hardware” icon on your task bar. Figure 2.1: Unplug or Eject Hardware Dialog Step3: Select “Advantech USB-4750 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 unexpected system error or damage may occur. USB-4750 User Manual 10
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2 3 Signal Connections Sections include: • Overview • Isolated Digital I/O Connections • Field Wiring Considerations CHAPTER
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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-4750 is equipped with plug-in screw-terminal connectors that facili- tate connection to the module without terminal boards or cables. 3.2.1 Pin Assignments Figure 3
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3.2.2 I/O Connector Signal Description Table 3.1: I/O Connector Signal Descriptions Signal Reference Direction Description IDI<0~15> GND Input Isolated digital input channels INT<0,1> INT_G Input Interrupt trigger sources. INT<0,1>_ - - Ground for interrupt pins. G CNT<0,1> GND Input Isolated input counters IDO<0~15> GND Output Isolated digital output channels COM<0,1> - - Common pins for connecting induc- tive loads of isolated output channels GND - - Ground 3.2.3 LED Indicator Status Descripti
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3.3 Isolated Digital I/O Connections 3.3.1 Dry/Wet Contact Support for Digital Input Each digital input channel accepts either dry contact or 0 ~ 5 VDC wet contact inputs. Dry contact capability allows the channel to respond to changes in external circuitry (e.g., the closing of a switch in the external circuitry) when no voltage is present in the external circuit. Figure 3-1 shows external circuitry with both wet and dry contact components, con- nected as an input source to one of the card
