Keithley 7037, Инструкция по эксплуатации

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4 Card Connections and Installation
Introduction ......................................................................................................................................................... 4-1
Handling precautions........................................................................................................................................... 4-2
Digital I/O connections........................................................................................................................................ 4-2
Voltage source jumper................................................................................................................................. 4-2
Pull-up resistors........................................................................................................................................... 4-2
Configuring digital I/O output logic............................................................................................................ 4-4
Configuring digital I/O input pull-up resistance ......................................................................................... 4-4
Multi-pin (mass termination) connector card...................................................................................................... 4-5
Typical relay switch connection scheme........................................................................................................... 4-10
Typical digital I/O connection schemes ............................................................................................................ 4-11
Output connection schemes....................................................................................................................... 4-11
Input connection scheme ........................................................................................................................... 4-12
Model 7037 installation and removal................................................................................................................ 4-13
Card installation......................................................................................................................................... 4-13
Card removal ............................................................................................................................................. 4-13
5 Operation
Introduction ......................................................................................................................................................... 5-1
Power limits......................................................................................................................................................... 5-1
Digital I/O maximum signal levels.............................................................................................................. 5-1
Relay switch maximum signal levels .......................................................................................................... 5-1
Reactive loads.............................................................................................................................................. 5-1
Mainframe control of the card............................................................................................................................. 5-2
Channel assignments ................................................................................................................................... 5-3
Closing and opening channels..................................................................................................................... 5-5
Scanning channels ....................................................................................................................................... 5-5
Reading input channels................................................................................................................................ 5-6
IEEE-488 bus operation .............................................................................................................................. 5-6
Measurement considerations ............................................................................................................................... 5-8
Path isolation ............................................................................................................................................... 5-8
Magnetic fields ............................................................................................................................................ 5-8
Radio frequency interference ...................................................................................................................... 5-9
Ground loops ............................................................................................................................................... 5-9
Keeping connectors clean.......................................................................................................................... 5-10
AC frequency response.............................................................................................................................. 5-10
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