© National Instruments Corporation 1-1 NI 653X User Manual1Getting Started with YourNI 653XThe NI 653X User Manual describes installing, configuring, setting up,and programming applications for the NI 653X family of digital I/O (DIO)devices. The NI 653X family includes the NI AT-DIO-32HS,NI DAQCard-6533 for PCMCIA, NI PCI-6534, NI PCI-DIO-32HS,NI PXI-6533, NI PXI-6534, and NI PCI/PXI-7030/6533.NI 653X OverviewWith NI 653X devices, you can use your computer or chassis as adigital I/O tester, logic analyzer, or system controller for laboratory testing,production testing, and industrial process monitoring and control.Each NI 653X provides 32 digital data lines that are individuallyconfigurable as input or output, grouped into four 8-bit ports. Each line cansink or source 24 mA of current.The NI 6534 contains onboard memory, enabling you to transfer datato/from this memory at a guaranteed rate. This memory removes thedependency on the host computer bus for applications that requireguaranteed transfer rates.The NI PCI/PXI-7030/6533 is an RT Series device that contains aprocessor board (NI 7030), an NI 6533 daughter board, and an independentprocessor that runs LabVIEW Real-Time applications. The NI 6533daughter board contains all the features and functions of theNI PCI/PXI-6533 described in this manual. For more information aboutyour NI PCI/PXI-7030/6533, refer to the RT Series DAQ Device UserManual.The NI 6534 uses the Real-Time System Integration (RTSI) bus to easilysynchronize several measurement devices to a common trigger or timingevent. The RTSI bus allows synchronization of the measurements. TheRTSI bus consists of the RTSI bus interface and a ribbon cable to routetiming and trigger signals between as many as five DAQ devices in the