
17
Wiring Architecture
PC
Ethernet
switch /
hub
RS-232 RS-232 (RTS / CTS)
LAN
cable
Serial
Device
Rx
Tx
GND
RTS
CTS
Serial to
TCP/IP
Tx
Rx
GND
CTS
RTS
Serial
Device
Rx
Tx
GND
Serial to
TCP/IP
Tx
Rx
GND
RS-422 RS-485
Serial
Device
D -
D+
Serial to
TCP/IP
D -
D+
Serial
Device
Rx-
Rx+
Tx-
Tx+
Serial to
TCP/IP
Tx-
Tx+
Rx-
Rx+
Pin Assignment
RS-232 (Port 1)
Pin 1: N/A Pin 2: RxD
Pin 3: TxD Pin 4: N/A
Pin 5: GND Pin 6: N/A
Pin 7: RTS Pin 8: CTS
Pin 9: N/A
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