1. 03 September 2007 Digital I/O Wiring Exercise

2. Copyright © 2007 Alien Technology Corporation. Advanced Academy Student use only. Not for redistribution RFID-301, Mod 3, page 2 03 September 2007 Typical Digital Output Circuit Typical Digital Input Circuit EXTERNAL_V-(PIN_14) OPTO_IN0-3(PIN_10-13) 0.5A EXTERNAL_V-(PIN_14) OPTO_OUT0-7(PIN_2-9) EXTERNAL_V+(PIN_1) Digital I/O Reference Circuits

3. Copyright © 2007 Alien Technology Corporation. Advanced Academy Student use only. Not for redistribution RFID-301, Mod 3, page 3 03 September 2007 Digital I/O Wiring Exercise 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.

4. Copyright © 2007 Alien Technology Corporation. Advanced Academy Student use only. Not for redistribution RFID-301, Mod 3, page 4 03 September 2007 Breakout Board Exercise Sourcing Input 24Vdc Power Supply +24VDC (Red) +24VDC (Wht) Green Light (Grn) Yellow Light (Org) Red Light (Red) R1 +24VDC (Brown) Source (Black) DC Return (Blue) Reflector Photo eye DC Return (Black) DC Return (Black) (White) (In-1) (White) Sink (White) N/C + Vcc (Pin 1) (Out-3) Vin