External serial port 2 connector (com2) – Avalue RITY152 User Manual
Page 12
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RITY152
12 RITY152 Quick Reference Guide
2.1.2
External Serial Port 2 connector (COM2)
In RS-232 Mode
Signal
PIN PIN
Signal
DCDB#
1
6
DSRB#
RXDB
2
7
RTSB#
TXDB
3
8
CTSB#
DTRB#
4
9
RIB#
GND
5
In RS-422 Mode
Signal
PIN PIN
Signal
TxD1-
1
6
NC
TxD1+
2
7
NC
RxD1+
3
8
NC
RxD1-
4
9
NC
GND
5
In RS-485 Mode
Signal
PIN PIN
Signal
DATA1-
1
6
NC
DATA1+
2
7
NC
NC
3
8
NC
NC
4
9
NC
GND
5
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