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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