USB to RS-422 / RS-485 Adapter
RJ-11 Connector
RS-422
RS-485
PC# 2
PC# 1
RX
-
RX+
TX-
5
4
2
3
RX
-
RX+
TX-
5
4
2
3
RJ-11
TX+
RJ-11
TX+
▲
Point to Point:
RS-422
(Full Duplex Mode)
PIN2 : RX+
PIN3 : RX-
PIN4 : TX-
PIN5 : TX+
RS-485 ( Half Duplex Mode)
PIN4 : D -
PIN5 : D+
7
RJ-11
RJ-11
RJ-11
D-
D+
4
5
PC# 1
▲
Point to Point:
4
5
D-
D+
▲
Multi-Drop:
5
4
PC# 1
PC# 4
5
4
RJ-11 RJ-11
D+
D-
D+
D-
D-
D+
5
4
PC# 3
PC# 2
D-
D+
5
4
PC# 2
RJ-11