National Instruments SCB-68 User Manual download pdf (Page 40)

Chapter 3 Connecting Signals

SCB-68 Shielded Connector Block User Manual 3-12 ni.com

Figure 3-7. Digital I/O Connections

Connecting Timing Signals

If you are using a 68-pin or 100-pin DAQ device, all external control over

device timing is routed through the programmable function input (PFI)

lines <0..9>. These PFI lines are bidirectional; as outputs they are not

programmable and reflect the state of many DAQ, waveform generation,

and general-purpose timing signals. The remaining timing signals use

five different dedicated outputs.

Note For more information, refer to the device user manual at ni.com/manuals for

detailed signal description and connection information.

+5 V

LED

TTL Signal

+5 V

Switch

I/O Connector

DGND

SCB-68

DIO<0..3>

DIO<4..7>

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 103 104

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National Instruments SCB-68 User Manual Page 40