Measurement Computing USB-2527 - Manual (Page 4)

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Table of Contents
Preface
About this User's Guide ....................................................................................................................... 6
What you will learn from this user's guide ......................................................................................................... 6
Conventions in this user's guide ......................................................................................................................... 6
Where to find more information ......................................................................................................................... 6
Chapter 1
Introducing the USB-2527 .................................................................................................................... 7
Overview: USB-2527 features ............................................................................................................................ 7
Software features ................................................................................................................................................ 7
Chapter 2
Installing the USB-2527 ........................................................................................................................ 8
What comes with your USB-2527 shipment? ..................................................................................................... 8
Hardware .......................................................................................................................................................................... 8
Optional components ........................................................................................................................................................ 8
Signal conditioning accessories ........................................................................................................................................ 9
Additional documentation ................................................................................................................................................. 9
Unpacking the USB-2527 ................................................................................................................................... 9
Installing the software ........................................................................................................................................ 9
Installing the USB-2527 ................................................................................................................................... 10
Configuring the hardware ................................................................................................................................. 10
Connecting the board for I/O operations .......................................................................................................... 11
Connectors, cables – main I/O connector .........................................................................................................................11
68-pin SCSI connector differential and single-ended pin outs (P5) .................................................................................12
TB-100 terminal board connector to SCSI connector pin out ..........................................................................................14
40-pin header connector pin outs .....................................................................................................................................15
Four-channel TC terminal pin out (TB7) .........................................................................................................................19
Cabling ............................................................................................................................................................. 20
Field wiring and signal termination .................................................................................................................................21
Using multiple USB-2527s per PC ................................................................................................................... 21
Chapter 3
Functional Details ............................................................................................................................... 22
USB-2527 components ..................................................................................................................................... 22
USB-2527 block diagram ................................................................................................................................. 24
Synchronous I/O – mixing analog, digital, and counter scanning .................................................................... 25
Analog input ..................................................................................................................................................... 25
Analog input scanning .....................................................................................................................................................25
Thermocouple input .......................................................................................................................................... 28
Tips for making accurate temperature measurements ......................................................................................................28
Analog output ................................................................................................................................................... 29
Digital I/O ......................................................................................................................................................... 30
Digital input scanning ......................................................................................................................................................30
Digital outputs and pattern generation .............................................................................................................................31
Triggering ......................................................................................................................................................... 31
Hardware analog triggering .............................................................................................................................................31
Digital triggering..............................................................................................................................................................31
Software-based triggering ................................................................................................................................................32
Stop trigger modes ...........................................................................................................................................................32
Pre-triggering and post-triggering modes ........................................................................................................................32