Digital I/O Signal Connection Applications

Figure 13. PCIe-6509 Signal Connections

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The previous figure shows an example of signal connections for three typical digital I/O applications:

  • Digital output is configured on port 0 to send TTL signals and drive external devices such as the LED.
  • Digital input is configured on port 7 to:
    • Receive TTL signals.
    • Sense external device states such as the state of the switch.