Aaeon PCM-5335 Manual page 36

P C / 1 0 4 M o d u l e
2.22 COM2 RS-232/422/485 Connector (CN12)
Different devices implement the RS-232/422/485 standard in
different ways. If you are having problems with a serial device, be
sure to check the pin assignments below for the connector.
Pin Signal
1 DCD (422TXD-/485DATA-)
TXD
3
(422TXD+/485DATA+)
5 GND
7 RTS
9 RI
Chapter 2 Quick Installation Guide
P C M - 5 3 3 5
Pin Signal
2 RXD (422RXD+)
4 DTR (422RXD-)
6 DSR
8 CTS
10 NC
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