National Instruments NI 6115, NI 6120 Chapter 4 Connecting Signals

Contents
NI 6115/6120 User Manual viii ni.com
Timing Signal Routing..................................................................................................3-10
Programmable Function Inputs.......................................................................3-12
Device and RTSI Clocks.................................................................................3-12
RTSI Triggers.................................................................................................3-12
Chapter 4
Connecting Signals
I/O Connector................................................................................................................4-1
I/O Connector Signal Descriptions.................................................................4-3
Types of Signal Sources................................................................................................4-7
Floating Signal Sources..................................................................................4-7
Ground-Referenced Signal Sources................................................................4-8
Connecting Analog Input Signals..................................................................................4-8
Connections for Ground-Referenced Signal Sources.....................................4-9
Connections for Nonreferenced or Floating Signal Sources...........................4-11
Common-Mode Signal Rejection Considerations...........................................4-12
Working Voltage Range................................................................................................4-13
Connecting Analog Output Signals...............................................................................4-14
Connecting Digital I/O Signals.....................................................................................4-15
Correlating DIO Signal Connections.............................................................................4-16
Power Connections........................................................................................................4-18
Connecting Timing Signals...........................................................................................4-18
Programmable Function Input Connections................................................... 4-20
DAQ Timing Connections..............................................................................4-20
TRIG1 Signal....................................................................................4-21
TRIG2 Signal....................................................................................4-22
STARTSCAN Signal........................................................................4-24
CONVERT* Signal..........................................................................4-26
AIGATE Signal................................................................................4-27
SISOURCE Signal............................................................................4-27
SCANCLK Signal............................................................................4-28
EXTSTROBE* Signal......................................................................4-29
Waveform Generation Timing Connections...................................................4-29
WFTRIG Signal................................................................................4-29
UPDATE* Signal.............................................................................4-30
UISOURCE Signal...........................................................................4-31
General-Purpose Timing Signal Connections.................................................4-32
GPCTR0_SOURCE Signal..............................................................4-32
GPCTR0_GATE Signal................................................................... 4-33
GPCTR0_OUT Signal......................................................................4-34
GPCTR0_UP_DOWN Signal...........................................................4-35
GPCTR1_SOURCE Signal..............................................................4-35
GPCTR1_GATE Signal................................................................... 4-36