Serial Port - Xinje XSA330-W User Manual

1.3.9 Serial port

XSA330-W seriesis equipped with corresponding RS232 and RS485 communication serial ports. For
DB9 serial ports, the change of BIOS settings can realize the switching function between RS232 and
RS485, and realize the communication between devices.
Series
XSA330-W *
Note: When the two DB9 interfaces leave the factory, they are RS232 serial ports by default. If you
need RS485 serial ports, please modify them in the BIOS path in Advanced>Super IO
Configuration>Serial Port 1 Configuration>COM Mode>RS485 Mode. See Section 5.9 for details.
DB9 communication port (RS232/RS485)
The pin definitions are as follows:
Pin
RS232 (DB9)
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
DATA-
2
3 DATA+
GND
4
SSRX-
5
6 SSRX+
GND
7
SSTX-
8
9
SSTX+
DB9 interface (RS232)
2
Figure 1-9 RS232/RS485 serial port
Description
Carrier detection
Receive data
Send data
Data terminal ready
Signal ground
Data ready
Send request
Clear send
Ringing prompt
Differential signal
Power supply ground
High speed receiving
differential data signal
Signal ground
High speed sending
differential signal
Default
DB9 interface (RS485)
0
RS485 (DB9)
DATA-
DATA+
NC
NC
GND
NC
NC
NC
NC
Description
B: RS485-
A: RS485+
/
/
Signal ground
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/
/
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