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C1648M (4/05) 21
Figure 12.
RS-485 4-Wire (Full Duplex) Data Communication Wiring
RS-485 4-WIRE
DATA SELECTION
RS-485 4-WIRE FR85081DATA CONNECTIONS BETWEEN DEVICE A AND RECEIVER
FR85081
RECEIVER –
DATA CONNECTOR
1 (TX+) DATA OUT+
2 (TX-) DATA OUT-
3 (RX+) DATA IN+
4 (RX-) DATA IN-
5
6
7
8
GND
RX+
RX-
TX+
TX-
DEVICE A
FT85081
TRANSMITTER –
DATA CONNECTOR
RS-485 4-WIRE
DATA SELECTION
RS-485 4-WIRE FT85081DATA CONNECTIONS BETWEEN DEVICE B AND TRANSMITTER
1 (TX+) DATA OUT+
2 (TX-) DATA OUT-
3 (RX+) DATA IN+
4 (RX-) DATA IN-
5
6
7
8
GND
RX+
RX-
TX+
TX-
DEVICE B
RS-485
4-WIRE
RS-485
4-WIRE
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9