National Instruments 6023E, 6024E, 6025E Chapter 4 Signal Connections

Contents
6023E/6024E/6025EUser Manual vi ni.com
Chapter 4
Signal Connections
I/O Connector................................................................................................................4-1
AnalogInput Signal Overview ......................................................................................4-8
Types of Signal Sources ..................................................................................4-8
FloatingSignal Sources....................................................................4-9
Ground-Referenced Signal Sources.................................................. 4-9
AnalogInput Modes........................................................................................4-9
AnalogInput Signal Connections ..................................................................................4-11
Differential Connection Considerations (DIFF Input Configuration) ............4-13
DifferentialConnections for Ground-R eferencedSignal Sources ... 4-14
Differential Connections for Nonreferenced or Floating Signal
Sources...........................................................................................4-15
Single-EndedConnection Considerations ...................................................... 4-17
Single-Ended Connections for Floating Signal Sources
(RSEConfiguration) ......................................................................4-18
Single-Ended Connections for Grounded Signal Sources
(NRSE Configuration) ...................................................................4-18
Common-Mode Signal Rejection Considerations ...........................................4-19
AnalogOutput Signal Connections ...............................................................................4-19
DigitalI /O Signal Connections.....................................................................................4-20
AllD evices......................................................................................................4-20
ProgrammablePeripheral Interface(PPI) .....................................................................4-22
PortC Pin Assignments ..................................................................................4-23
Power-upState ................................................................................................4-24
ChangingDIO Power-up State to Pulled Low................................. 4-24
TimingSpecifications .....................................................................................4-25
Mode 1 Input Timing...................................................................................... 4-27
Mode1 OutputTiming ...................................................................................4-28
Mode2 BidirectionalTiming ..........................................................................4-29
PowerConnections ........................................................................................................4-30
TimingConnections ......................................................................................................4-30
ProgrammableFunction InputConnections ...................................................4-31
DAQ Timing Connections ..............................................................................4-32
SCANCLK Signal ............................................................................4-33
EXTSTROBE*Signal ......................................................................4-33
TRIG1S ignal....................................................................................4-34
TRIG2S ignal....................................................................................4-35
STARTSCANSignal ........................................................................4-36
CONVERT*Signal .......................................................................... 4-38
AIGATESignal ................................................................................ 4-39
SISOURCE Signal............................................................................4-40