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Digital I/O Wiring Exercise with Opto-Isolated Inputs and Outputs

This digital I/O wiring exercise focuses on constructing and testing typical digital output and input circuits using a breakout board. Participants will wire the digital I/O as specified, ensuring proper connections to external power supplies and opto-isolators. The exercise includes using an external I/O tester to confirm operations, with indicators for various outputs. Additionally, participants will calculate the value of the series resistor for the appropriate input voltage. This hands-on experience enhances understanding of digital I/O systems.

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Digital I/O Wiring Exercise with Opto-Isolated Inputs and Outputs

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  1. Digital I/O Wiring Exercise

  2. EXTERNAL_V+(PIN_1) OPTO_OUT0-7(PIN_2-9) 0.5A EXTERNAL_V-(PIN_14) OPTO_IN0-3(PIN_10-13) EXTERNAL_V-(PIN_14) Digital I/O Reference Circuits Typical Digital Output Circuit Typical Digital Input Circuit

  3. Goals Wire the I/O and test for proper operation The digital I/O should be wired as follows. Use the External IO tester for confirmation. Amber = Output 1 Red = Output 2 Green = Output 3 Photo eye trigger rising edge Input #1 Find the value of the series resistor, R1, for the appropriate Input voltage, Vin. Digital I/O Wiring Exercise

  4. Breakout Board ExerciseSourcing Input +24VDC (Red) 24Vdc Power Supply DC Return (Black) +24VDC (Wht) Red Light (Red) Yellow Light (Org) Green Light (Grn) + Vcc (Pin 1) (Out-3) +24VDC (Brown) Vin R1 Source (Black) (In-1) Reflector (White) (White) Sink (White) N/C DC Return (Blue) DC Return (Black) Photo eye

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