5. Each Component Function
62
User’s Manual
SERIAL3, 4(RS-232C Ports)
The product has two channels of RS-232C compliant serial ports supporting up to a baud rate of 230,400
bps with a 64-byte transmission-dedicated data buffer and a 64-byte reception-dedicated data buffer.
Table 5.9. RS-232C Port Connector
Pin No.
1
2
3
4
5
6
7
8
9
Connector used on the product
9-socket D-SUB (MALE)
Signal name
CD
RD
TD
DTR
GND
DSR
RTS
CTS
RI
Direction
Input
Input
Output
Output
-----
Input
Output
Input
Input
1
5
9
6
No.4-40UNC
Inch thread
Meaning
Carrier detect
Received data
Transmitted data
Data terminal ready
Signal ground
Data set ready
Request to send
Clear to send
Ring indicator
