AAEON PFM-HDS - Manual (Page 32)

P C / 1 0 4 M o d u l e P F M - H D S
Chapter 2 Quick Installation Guide 2-20
CN21 Function
1-2 (Open) ATX
1-2 AT
2.25 COM1 RS232 Connector (CN22)
Pin Pin Name Signal Type Signal Level
1 DCD1 IN
2 DSR1 IN
3 RXD1 IN
4 RTS1 OUT ±9V
5 TXD1 OUT ±9V
6 CTS1 IN
7 DTR1 OUT ±9V
8 RI1 IN
9 GND GND