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779679-01

更新时间: 2022-12-16 16:21:08
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美国国家仪器公司 - NI /
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6页 1576K
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IEEE 1394 Image Acquisition with Digital I/O

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IEEE 1394 Image Acquisition with Digital I/O  
NI PCI-8254R, NI PCIe-8255R NEW!  
• 2 IEEE 1394a camera inputs  
• 400 Mb/s image data transfer  
• 29 TTL and isolated DIO lines  
• 15 input, 14 output  
• Reconfigurable DIO with  
LabVIEW FPGA  
Operating Systems  
• Windows XP/2000  
Recommended Software  
• LabVIEW and the NI Vision  
Development Module  
• Vision Builder AI  
Driver Software  
• NI Vision Acquisition  
software (included)  
begin acquiring images. With a set of easy-to-use functions, you can  
quickly create applications in National Instruments LabVIEW, C/C++,  
or Visual Basic. Vision Acquisition software is compatible with IIDC-  
compliant cameras. You can connect a maximum of 16 cameras to your  
board and acquire from each one. Advanced functionality includes the  
ability to query the camera for onboard parameters and to change  
programmatic parameters programmatically. Vision Acquisition is also  
compatible with Camera Link, analog, GigE, and parallel digital cameras  
(through compatible NI hardware), so you can use programs written for  
NI 825xR boards with a wide range of cameras without major changes  
to your code.  
Overview  
With the National Instruments 825xR image acquisition boards, you  
can build machine vision systems that trigger and synchronize two or  
more IEEE 1394 cameras without requiring additional digital I/O boards  
or custom circuitry. The NI PCI-8254R has 400 Mb/s of bandwidth and  
two direct-connect IEEE 1394a ports that share that bandwidth. The  
NI PCIe-8255R has 800 Mb/s of bandwidth shared between two direct-  
connect IEEE 1394b ports (IEEE 1394a cameras are compatible with a  
converter cable). Both of these boards feature NI reconfigurable I/O (RIO)  
technology and include all the digital I/O you need for industrial control  
and communication.  
Onboard Digital I/O  
About IEEE 1394  
The NI 825xR series has 15 digital input lines – 13 isolated 24 V lines  
and two dedicated TTL lines. There are also 14 digital output lines – four  
isolated 24 V and 10 dedicated TTL. You can access all 29 digital lines  
for synchronizing vision components such as cameras, triggers, and  
lights. You also can use quadrature encoder inputs, product selection  
lines, and general-purpose digital I/O for communicating with actuators,  
PLCs, and NI programmable automation controllers (PACs).  
IEEE 1394 is a PC bus standard ideally suited for machine vision. Any  
IEEE 1394 camera that complies with the DCAM (or IIDC) standard works  
with the National Instruments Vision Acquisition driver. With digital  
image quality, simple cabling, standard software, and a lower cost, IEEE  
1394 cameras are quickly replacing analog cameras in machine vision  
applications. Today, there are more than 300 industrial IEEE 1394  
cameras available from nearly every major vision company.  
Reconfigurable I/O  
Vision Acquisition Software  
As with the Compact Vision System, you can extend the NI 825xR  
functionality with NI RIO technology. Using the NI LabVIEW FPGA  
Module, you can customize all 29 digital I/O lines to perform a wider  
variety of packaging inspection, assembly verification, and robot  
control applications.  
NI Vision Acquisition software offers a mobile, easy-to-use solution  
for acquiring images from IEEE 1394 cameras. The driver software  
integrates with NI Measurement & Automation Explorer, so you can  
easily configure your camera. You also can quickly set up your system  
by connecting an IEEE 1394 camera to your computer and immediately  

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