10
2.5.6 RS-232/422/485 DB9 Connector (COM1)
Pin
1
2
3
4
5
6
7
8
9
2.5.7 RS-232/422/485 Connector (COM2)
Pin
1
2
3
4
5
6
7
8
9
Chapter 2 – Hardware Information
UART0_TXD
Signal
DCDA / RS422TX- / RS485-
RXA / RS422TX+ / RS485+
TXA / RS422RX+
DTRA / RS422RX-
GND
DSRA
RTSA
CTSA
RIA
Signal
DCDB / RS422TX- / RS485-
RXB / RS422TX+ / RS485+
TXB / RS422RX+
DTRB / RS422RX-
GND
DSRB
RTSB
CTSB
RIB
25