Avalue Technology EMX-B75 Quick Installation Manual page 15

EMX-B75 Quick Installation Guide
2.3.12 Serial port 4~9 connector (COM4~9)
COM1_3
2.3.13 Serial port 2/10 connector (COM2/10)
COM10
COM2
Signal
DCD
TXD
GND
RTS
Normal
Note:
Serial Port Function
RS 232 with 5V/12V
RS 232 without voltage
PIN
1
2
3
4
Note:
Serial Port Function
RS 422/485
EMX-B75 Quick Installation Guide 15
PIN PIN Signal
1 2 RXD
3 4 RTD
5 6 DSR
7 8 CTS
9
Serial Port number
COM1, COM3~COM6
COM7, COM8, COM9
Signal
RS485_TX-
RS485_TX+
RS422_RX-
RS422_RX+
Serial Port number
COM2 , COM10