24
(8) COM3/COM4/COM5/COM6 (9-pin): RS232 Serial Port Header
(2.0 pitch)
Pin 1
2 3 4 5
6 7 8 9
COM6
COM5
COM4
COM3
Pin NO. RS232
Pin 1
DCD
Pin 2
SIN
Pin 3
SOUT
Pin 4
DTR
Pin 5
GND
Pin 6
DSR
Pin 7
RTS
Pin 8
CTS
Pin 9
RI
(9) TX-RXCOM1 (4-pin): COM1 Header RS422/RS485
(2.0 pitch)