National Instruments NI 783xR User Manual

Also see for NI 783xR: User manual User manual

Contents

National Instruments NI 783xR User Manual Manual pdf 34 page image

Chapter 2 Hardware Overview of the NI 783xR© National Instruments Corporation 2-15 NI 783xR User ManualFigure 2-9. Analog Output ConnectionsDigital I/OYou can configure the NI 783xR DIO lines individually for either input oroutput. When the system powers on, the DIO lines are high impedance. Toset another power-on state, you can configure the NI 783xR to load a VIwhen the system powers on. The VI can then set the DIO lines to anypower-on state.Connecting Digital I/O SignalsThe DIO signals on the NI 783xR MIO connector are DGND andDIO<0..15>. The DIO signals on the NI 783xR DIO connector are DGNDand DIO<0..39>. The DIO<0..n> signals make up the DIO port and DGNDis the ground reference signal for the DIO port. The NI 7830R has one MIOand one DIO connector for a total of 56 DIO lines. The NI 7831R/7833Rhas one MIO and two DIO connectors for a total of 96 DIO lines.Refer to Figure B-1, NI 783xR Connector Locations, and Figure B-2,NI 783xR I/O Connector Pin Assignments, for the connector locations andthe I/O connector pin assignments on the NI 783xR.The DIO lines on the NI 783xR are TTL-compatible. When configured asinputs, they can receive signals from 5 V TTL, 3.3 V LVTTL, 5 V CMOS,and 3.3 V LVCMOS devices. When configured as outputs, they can sendsignals to 5 V TTL, 3.3 V LVTTL, and 3.3 V LVCMOS devices. Becausethe digital outputs provide a nominal output swing of 0 to 3.3 VLoadVOUT 0+– AOGND0NI 783xRAO0 Channel 0