AAEON PCM-QM77 User Manual
Page 53
Advertising
C o m p a c t B o a r d
P C M - Q M 7 7
Chapter 2 Quick Installation Guide
2-38
7 RTS OUT ±9V
8 CTS
IN
9 RI
IN
10 NC
2.39 COM Port 3 (CN20)
RX
DTR
DSR
CTS
NC
DCD
1
2
9
10
TX
GND
RTS
RI
Pin
Pin Name
Signal Type
Signal Level
1 DCD
IN
2 RX
IN
3 TX OUT
±9V
4 DTR OUT ±9V
5 GND GND
6 DSR
IN
7 RTS OUT ±9V
8 CTS
IN
9 RI
IN
10 NC
Advertising