Emb-q77a, Pin signal – AAEON EMB-Q77A User Manual
Page 34
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EMB-Q77A
2-26
10. Serial port connectors (10-1 pin COM1, COM2)
These connectors are for serial (COM) ports. Connect the serial port module
cables to these connectors, then install the module to a slot opening at the
back of the system chassis.
EMB-Q77A Serial port connector
PIN 1
COM1
DCD
TXD
GND
RTS
RI/+12V/+5V
RXD
DTR
DSR
CTS
PIN 1
COM2
DCD
TXD
GND
RTS
RI/+12V/+5V
RXD
DTR
DSR
CTS
Pin Signal
Pin Signal
1
DCD (422TXD-/485DATA-)
2
RXD (422RXD+)
3
TXD (422TXD+/485DATA+) 4
DTR (422RXD-)
5
GND
6
DSR
7
RTS
8
CTS
9
RI/+12V/+5V
10
N.C.
NOTES:
• The COM module is purchased separately.
• Only COM1 can support RS-422 and RS-485.
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