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USB-4750 32-Channel Isolated Digit al I/O USB Data Acquisition Module User Manual.
Contents Chapter 1 Introduction ............ ............................... .......... 2 1.1 Hardware Fea tu res .. . .. .. . ... ..... .... .. .. . ... .... . ... .... .. .. . .. .. . ... .... .. .. 2 1.2 Software Overview....... .............. ....
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.
1.2 Sof tw are Overview Omega offers a rich set of DLL drivers, th ird-party driver support and application software on the comp anion CD-ROM to help fully exploit the functions of your device.
USB-4750 User Manual 4.
2 2 Inst allation Sections include: • Unpacking • Driver Installation • Hardware Installation • Hardware Uninstallation.
Chapter 2 Inst allation 2.1 Unp ackin g After receiving your USB-4750 package, please inspect its contents first. The package should contain the followi n g i tems: • USB-4750 Module • Shield ed USB 2.
2.2 Driver Inst allation W e recommend you install the software driver before you install the USB-4750 module into your system, sinc e this wi l l 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.
For further information on driver-related issues, an online version of the Device Drivers Manual is available by accessing the following path: S tart/Pr ograms/Omega USB-4700 Series/ Device Driver ’.
2.3 Hardware Installation Note: Make sure you ha ve inst alle d th e so f twar e driver before you in stall the module (please re fer to Sec- tion 2. 2 Driver Installation) Afte r 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.
St e p 2 : Right click the “Unplug or Eject Hardware” icon on your task bar . Figure 2.1: Unplug or Eject Hardware Dialog St e p 3 : Select “USB-4750 Device” and press “Stop” Button. Figure 2.2: S top a Hardware device dial og box St e p 4 : Unplug your USB device from the USB port.
3 2 Signal Connections Sections include: • Overview • Isolated Digital I/O Connections • Field W iring Considerations.
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.
3.2.2 I/O Conne ctor Signal Description T abl e 3.1: I/O Connector Sig nal Descriptions Sign al Re fere nce Dir ecti on De scr iption IDI<0~1 5> GND Input Isol ated d igit al inpu t ch annel s IN T<0, 1> IN T_ G Inp ut Int err up t trig ge r sou rces.
3.3 Iso late d Dig it al I/O Connections 3.3.1 Dry/W et Cont act Support for Digit al 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.
3.3.2 Isolated Digit al Output Conne ctions Each of 8 isolated digital output channels comes equipped with a Darling- ton tran sistor . Every 8 output chan nels share common collectors and inte- gral supp ression diodes for indu ctiv e loads. Channels 0 ~ 7 use COM0, and channels 8 ~ 15 use COM1 as a common pi n.
3.4 Field Wiring Consideratio ns • When you use USB-4750 to acquire data from outside, noises in the environment might significantly af fect the accuracy of your measure- ments if due cautions are not taken. The following measures will be helpful to reduce possible interference running signal wires between signal sources and the USB-4750.
A 2 S pecifications.
Appendix A S pecifications A.1 Isolat ed Digit al Input Channels 16 Interrupt Inputs DI0, D I8 Optical Isol ati on 2500 V D C Opto-isolator Resp on seT ime 25 µ s Input V o ltag e 5~50 VDC, o r dry contact A.
WARRANTY / DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time.
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