Measurement Computing USB-QUAD08 - Manual (Page 3)

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Table of Contents
Preface
About this User's Guide ....................................................................................................................... 5
What you will learn from this user's guide ......................................................................................................... 5
Conventions in this user's guide ......................................................................................................................... 5
Where to find more information ......................................................................................................................... 5
Chapter 1
Introducing the USB-QUAD08 ............................................................................................................. 6
Chapter 2
Installing the USB-QUAD08.................................................................................................................. 7
What comes with your USB-QUAD08 shipment? ............................................................................................. 7
Hardware .......................................................................................................................................................................... 7
Documentation .................................................................................................................................................................. 7
Optional components ........................................................................................................................................................ 7
Unpacking the USB-QUAD08 ........................................................................................................................... 7
Installing the software ........................................................................................................................................ 7
Configuring the channel input mode .................................................................................................................. 8
Installing the hardware ....................................................................................................................................... 8
Connecting the USB-QUAD08 to your system ................................................................................................................ 9
Signal connections .............................................................................................................................................. 9
Screw terminal pinout ......................................................................................................................................................10
37-pin connector pinout (J12 and J50) .............................................................................................................................12
Cables ..............................................................................................................................................................................13
Signal termination ............................................................................................................................................................14
DIN-rail mounting ...........................................................................................................................................................14
Connecting the USB-QUAD08 to an encoder .................................................................................................. 15
Chapter 3
Functional Details ............................................................................................................................... 17
USB-QUAD08 block diagram .......................................................................................................................... 17
External components ........................................................................................................................................ 18
Screw terminals................................................................................................................................................................18
37-pin connectors (J12, J50) ............................................................................................................................................19
LED indicators .................................................................................................................................................................19
USB connector .................................................................................................................................................................19
Counter input modes ......................................................................................................................................... 19
Quadrature counter mode .................................................................................................................................................19
Totalize counter mode......................................................................................................................................................20
Period measurement mode ...............................................................................................................................................21
Pulse width measurement mode .......................................................................................................................................21
Synchronous/asynchronous scanning ............................................................................................................... 21
Synchronous scanning .....................................................................................................................................................21
Asynchronous scanning ...................................................................................................................................................22
Debounce mode ................................................................................................................................................ 22
Trigger after stable mode .................................................................................................................................................22
Trigger before stable mode ..............................................................................................................................................23
Debounce mode comparisons ..........................................................................................................................................24
Digital I/O ......................................................................................................................................................... 25
Digital input .....................................................................................................................................................................25
Digital output ...................................................................................................................................................................25
Terminal count output ......................................................................................................................................................25
Timer output ....................................................................................................................................................................25
Driving digital outputs .....................................................................................................................................................26
Triggering ......................................................................................................................................................... 26