AOpen DEX5750 Series - Terminal Block Pin Definitions

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4.2 Terminal Block – pin definition
4.3 COM1 / COM3 – pin definition
COM1 support RS232/422/485 and it can be set by BIOS.
Signal
Pin definition
GND
ground signal
SW+
Power button
COM1 Male DB9 Pin RS232 RS422 RS485
1
DCD TX (B)
Data- (B)
2
RX TX (A) Data+ (A)
3
TX RX (A)
4
DTR
RX (B)
5
GND GND
6
DSR
7
RTS
8
CTS
9
RI
COM3 Male DB9 Pin RS232
1
DCD
2
RX
3
TX
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI