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Contents

NI 660x User Manual vi ni.com

Chapter 3

Signal Connections

Programmable Function Interfaces (PFIs)..................................................................... 3-1

Digital Filtering ............................................................................................................. 3-1

Power-On State.............................................................................................................. 3-3

Pin Assignments ............................................................................................................ 3-4

I/O Connector Pinout..................................................................................................... 3-6

Outputs .......................................................................................................................... 3-8

Counters......................................................................................................................... 3-10

Counter n Source Signal ................................................................................. 3-10

Counter Source to Counter Out Delay.............................................. 3-12

Counter n Gate Signal..................................................................................... 3-13

Counter n Auxiliary Signal ............................................................................. 3-14

Counter n Internal Output Signal.................................................................... 3-14

Hardware Arm Start Triggers ......................................................................... 3-15

Counter Pairs................................................................................................... 3-15

Counter Applications ...................................................................................... 3-15

Real-Time System Integration Bus ............................................................................... 3-16

RTSI Triggers ................................................................................................. 3-16

+5 V Power Source........................................................................................................ 3-18

I/O Signals .....................................................................................................................3-19

Field Wiring Considerations ........................................................................... 3-19

Noise ............................................................................................................... 3-19

Crosstalk.......................................................................................................... 3-20

Inductive Effects ............................................................................................. 3-21

Transmission Line Effects .............................................................................. 3-23

Appendix A

Technical Support and Professional Services

Glossary

Index

National Instruments NI 660 Series User Manual

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