6
MDI
(straight-through cable)
MDI-X
(Cross over cable)
Serial port connection
IT-SDS-302-T-2D series adopts RJ45 connector. The PIN define is as follows:
RS-232 port:
PIN
PIN define
Description
1
TXD
Transmit data
2
RXD
Received Data
3
RTS
Request to send
4
CTS
Clear to send
5
DSR
Data set ready
6
GND
Signal ground
7
DTR
Data terminal ready
8
DCD
Data carrier detect
1
8
1
8
RJ45
TX+
TX-
TX-
RX+
RX+
RX-
RX-
TX+
2
3
6
1
2
3
6
1
1
8
RJ45
TX+
TX-
TX-
RX+
RX+
RX-
RX-
TX+
2
3
6
1
6
1
2
3
(TX-)
(RX+)
(RX-)
(TX+)
(TX+)
(TX-)
(RX+)
(RX-)
