Advantech PCA-6774 User Manual page 107

C.20 COM2 Extension connector RS422-RS485(CN29)
Table C.20: COM2 Extension Connector RS422-RS485(CN29)
Description
Pin
1 TXD-
3 RXD-
C.21 LCD Inverter Backlight Connector (CN24)
Table C.21: LCD Inverter Backlight Connector(CN24)
Pin Signal
1 +12V output
2 GND
3 Back-light enable signal output
4 NC
C.22 ATX soft power switch connector (CN15)
Table C.22: ATX Soft Power Switch Connector(CN15)
Pin Signal
1 PS_ON signal input
2 GND
PCA-6774
User's Manual
Description
Pin
TXD+
2
RXD+
4
124