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C2604M (7/06) 21
Figure 10. RS-485 4-Wire (Full Duplex) Data Communication Wiring
RS-485 4-WIRE
DATA SELECTION
RS-485 4-WIRE DATA CONNECTIONS BETWEEN DEVICE A AND FR85011A RECEIVER
FR85011A
RECEIVER –
DATA CONNECTOR
1 TX+
2 TX-
3 RX+
4 RX-
(DATA OUT+)
(DATA OUT-)
(DATA IN+)
(DATA IN-)
(DATA OUT+)
(DATA OUT-)
(DATA IN+)
(DATA IN-)
5
6
7
8
GND
RX+
RX-
TX+
TX-
DEVICE A
FT85011A
TRANSMITTER –
DATA CONNECTOR
RS-485 4-WIRE
DATA SELECTION
RS-485 4-WIRE DATA CONNECTIONS BETWEEN DEVICE B AND FT85011A TRANSMITTER
1 TX+
2 TX-
3 RX+
4 RX-
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
C2604M.book Page 21 Friday, July 14, 2006 1:08 PM