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Appendix G HC601 Module Specifications
needs only three wires: RXD、TXD and signal ground.
DTE
HC601
DCE
HC601
DCD
1
1
DCD
DCD
1
1
DCD
RXD
2
2
RXD
RXD
2
2
RXD
TXD
3
3
TXD
TXD
3
3
TXD
4
DTR
DTR
4
4
DTR
5
5
GND
GND
5
5
GND
6
6
6
6
7
7
RTS
RTS
7
7
8
CTS
CTS
8
8
CTS
9
+5V
+5V
9
+5V
DTR
GND
RTS
CTS
+5V
4
8
9
HC601 与DTE
9
RTS
HC601 与DCE
Fig.G- 3
G.1.2.2 RS485 Port Definition
The RS485 port on COM1of HC601 is standard 9-pin connector (DB-9P) configured as
a DTE (Data Terminal Equipment). The RS485 port been connected to RS485 network
operates mostly in two wire mode.
The DB-9P connector pin definition:
Fig.G- 4 RS485 port DB-9P
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