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Description of Cables |
PC side AJ71UC24 side
RS-232 connector
TX (2) -------------------RX (3)
RX (3) -------------------TX (2)
RTS (4) --+--------------- CD (8)
CTS (5) --+
DTR (20) ------------------ DSR (6)
DSR (6) ------------------ DTR (20)
GROUND (7) ------------------ GROUND (7)
CD (8) ---------------+-- RTS (4)
+-- CTS (5)
NOTE |
These pin numbers refer to a DB-25 connector. When using a DB-9 connector, these pin numbers must be different. |
PC side RS232/485 adapter
TX (2) ----------------------- RX (3)
RX (3) ----------------------- TX (2)
RTS (4) ----------------------- CTS (5)
CTS (5) ----------------------- RTS (4)
GROUND (7) ----------------------- GROUND (7)
RS232/485 adapter AJ71UC24 side
RS-485 connector
+-- SDA
DATA(+) -----------------------+-- RDA
GROUND --------------------------- SG (Signal Ground)
DATA(-) -----------------------+-- SDB
+-- RDB