Advantech PCA-6751 Series - B.1 Installing PC;104 modules

Appendix C Pin Assignments 73
C.8 IR Connector (CN8)
Table C-8: IR connector
Pin Signal
1 +5 V
2 N/C
3 IR_RX
4 GND
5 IR_TX
C.9 External Speaker Connector (CN9)
Table C-9: External speaker connector
Pin Signal
1V
CC
2 N/C
3 Internal speaker
4 External speaker
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