Ers-byte connector mapping, External serial port 1 connector (com1), External serial port 3/4 connector (com3/4) – Avalue ERS-BYTE-10COM User Manual
Page 12: 1 ers-byte connector mapping
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ERS-BYTE
12 ERS-BYTE Quick Reference Guide
2.1 ERS-BYTE connector mapping
2.1.1
External Serial Port 1 connector (COM1)
Pin
RS-232
RS-485
RS-422
1
DCD
TXD-/RXD-
TXD-
2
RXD
TXD+/RXD+
TXD+
3
TXD
RXD+
4
DTR
RXD-
5
GND
GND
GND
6
DSR
7
RTS
8
CTS
9
RI
2.1.2
External Serial Port 3/4 connector (COM3/4)
Pin
RS-232
RS-485
RS-422
1
DCD
TXD-/RXD-
TXD-
2
RXD
TXD+/RXD+
TXD+
3
TXD
RXD+
4
DTR
RXD-
5
GND
GND
GND
6
DSR
7
RTS
8
CTS
9
RI
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