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OpNI671x Digital In




The National InstrumentsNI671x cards feature analog inputs, analog outputs, digital I/O lines and counters. This block monitors a user-defined subset of the 8 digital I/O lines, and configure these channels in input mode.

This block supports a list of PXI and PCI compatible cards selectable in the block parameters menu.


Bus TypeSee the glossary definition.
Board TypeSelect the card model (6713 or 6711) in this list.
Card index (PCI/PXI index)See the glossary definition.
Channel vectorEnter the vector of channel numbers to be monitored by this block. The channel numbers, in the range [0-7], can be entered in any order and must appear only once in the list.
SynchronizeSee the glossary definition.


This block has no inputs.


At each calculation step of the model, the block returns the current values (0 or 1) on the I/O lines. Only the values of the channels specified in the channel list parameter are returned and the outputs are in the order specified in the channel list parameter. The output width of the block must be equal to the number of entries in the channel list parameter.

Characteristics and Limitations


The SH68-68- EP cable (P/N 184749C-01) from National Instruments must be used.

Connector Pin Assignments

The following table gives the description of the signals related to the digital input channels and is followed by the connector pin assignments of the NI671x 68-pinI/O connector.

Signal Name Signal Description 
Digital IO 0..7Digital In/Out lines

68-pin I/O

Pin Description Pin Description 
34AnalogOut Ground68Not Connected
33Not Connected67AnalogOut Ground
32AnalogOut Ground66AnalogOut Ground
31AnalogOut Ground65DAC7OUT
30DAC6OUT 64AnalogOut Ground
29AnalogOut Ground63AnalogOut Ground
28DAC5OUT 62Not Connected 
27AnalogOut Ground61AnalogOut Ground
26AnalogOut Ground60DAC4OUT 
25DAC3OUT 59AnalogOut Ground
24AnalogOut Ground58AnalogOut Ground
23AnalogOut Ground57DAC2OUT 
22DAC0OUT 56AnalogOut Ground
21DAC1OUT 55AnalogOut Ground 
20EXTREF 54AnalogOut Ground 
19Digital IO 453Digital Ground
18Digital Ground52Digital IO 0
17Digital IO 151Digital IO 5
16Digital IO 650Digital Ground
15Digital Ground49Digital IO 2
14+5V48Digital IO 7
13Digital Ground47Digital IO 3
12Digital Ground46Not Connected
10PFI144Digital Ground
9Digital Ground43PFI2
7Digital Ground41PFI4/GPCTR1_GATE
5PFI6/WFTRIG39Digital Ground
4Digital Ground38PFI7
2GPCTR0_OUT36Digital Ground
1FREQ_OUT35Digital Ground
Direct FeedthroughNo
Discrete sample timeNo
XHP supportYes
Work offlineNo

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