National Instruments 6023E - Manual (Page 5)

Contents
6023E/6024E/6025E User Manual vi ni.com
Chapter 4
Signal Connections
I/O Connector ................................................................................................................ 4-1
Analog Input Signal Overview ...................................................................................... 4-8
Types of Signal Sources.................................................................................. 4-8
Floating Signal Sources .................................................................... 4-9
Ground-Referenced Signal Sources.................................................. 4-9
Analog Input Modes........................................................................................ 4-9
Analog Input Signal Connections.................................................................................. 4-11
Differential Connection Considerations (DIFF Input Configuration) ............ 4-13
Differential Connections for Ground-Referenced Signal Sources ... 4-14
Differential Connections for Nonreferenced or Floating Signal
Sources........................................................................................... 4-15
Single-Ended Connection Considerations ...................................................... 4-17
Single-Ended Connections for Floating Signal Sources
(RSE Configuration) ...................................................................... 4-18
Single-Ended Connections for Grounded Signal Sources
(NRSE Configuration) ................................................................... 4-18
Common-Mode Signal Rejection Considerations........................................... 4-19
Analog Output Signal Connections ............................................................................... 4-19
Digital I/O Signal Connections ..................................................................................... 4-20
All Devices...................................................................................................... 4-20
Programmable Peripheral Interface (PPI) ..................................................................... 4-22
Port C Pin Assignments .................................................................................. 4-23
Power-up State ................................................................................................ 4-24
Changing DIO Power-up State to Pulled Low ................................. 4-24
Timing Specifications ..................................................................................... 4-25
Mode 1 Input Timing ...................................................................................... 4-27
Mode 1 Output Timing ................................................................................... 4-28
Mode 2 Bidirectional Timing.......................................................................... 4-29
Power Connections ........................................................................................................ 4-30
Timing Connections ...................................................................................................... 4-30
Programmable Function Input Connections ................................................... 4-31
DAQ Timing Connections .............................................................................. 4-32
SCANCLK Signal ............................................................................ 4-33
EXTSTROBE* Signal ...................................................................... 4-33
TRIG1 Signal.................................................................................... 4-34
TRIG2 Signal.................................................................................... 4-35
STARTSCAN Signal........................................................................ 4-36
CONVERT* Signal .......................................................................... 4-38
AIGATE Signal ................................................................................ 4-39
SISOURCE Signal............................................................................ 4-40