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GETTING TO KNOW YOUR ECS-9755
2.4.15 COM Port Header
ECS-9755 provides 4 COM port headers for internal COM port cables.
CN27 CN28
Pin No.
Description
Port
1
Ground_Frame
COM3
2
Ground
COM3
3
RI
COM3
4
DTR
COM3
5
CTS
COM3
6
TXD
COM3
7
RTS
COM3
8
RXD
COM3
9
DSR
COM3
10
DCD
COM3
CN27:
Pin No.
Description
Port
1
Ground_Frame
COM4
2
Ground
COM4
3
RI
COM4
4
DTR
COM4
5
CTS
COM4
6
TXD
COM4
7
RTS
COM4
8
RXD
COM4
9
DSR
COM4
10
DCD
COM4
CN28:
Pin out: