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20 C2604M (7/06)
Figure 9. RS-485 2-Wire (Half Duplex) Data Communication Wiring
RS-485 2-WIRE
DATA SELECTION
RS-485 2-WIRE DATA CONNECTIONS BETWEEN DEVICE A AND FR85011A RECEIVER
FR
RECEIVER –
DATA CONNECTOR
85011A
3
4
5
6
7
8
GND
R+/T+
R-/T-
DEVICE A
RS-485 2-WIRE DATA CONNECTIONS BETWEEN DEVICE B AND FT85011A TRANSMITTER
FT
TRANSMITTER –
DATA CONNECTOR
85011A
DEVICE B
RS-485 2-WIRE
DATA SELECTION
3
4
5
6
7
8
GND
R+/T+
R-/T-
RS-485
2-WIRE
1
2
T+/R+
T-/R-
(DATA OUT+/DATA IN+)
(DATA OUT-/DATA IN-)
T+/R+
T-/R-
(DATA OUT+/DATA IN+)
(DATA OUT-/DATA IN-)
RS-485
2-WIRE
1
2
0
1
2
3
4
5
6
7
9
8
0
1
2
3
4
5
6
7
8
9
C2604M.book Page 20 Friday, July 14, 2006 1:08 PM