User guide

Quick Reference Guide
EMS-BYT Series Quick Reference Guide
17
2.1 EMS-BYT 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 3/4/5/6 connector (COM3/4/5/6)
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