User`s guide

Chapter 3
25
KUB
E
-8050/8051 User’s Manua
l
 COM Pin Assignment & Setting
Table 2 COM, DB-9 Connector
Pin RS232 (COM1-10)
RS422
(COM1*)
RS485
Half Duplex
(COM1*)
RS485
Full Duplex
(COM1*)
1 DCD, Data carrier detect
TX- DATA- TX-
2 RXD, Receive data
RX+ N/A RX+
3 TXD, Transmit data
TX+ DATA+ TX+
4 DTR, Data terminal ready
RX- N/A RX-
5 GND, ground GND GND GND
6 DSR, Data set ready N/A N/A N/A
7 RTS, Request to send N/A N/A N/A
8 CTS, Clear to send N/A N/A N/A
9 RI, Ring indicator N/A N/A N/A
* COM1 RS232/422/485 can be selected by JP4
Table 3 JP4 COM1 Port Signal / Power Selection
Jumper Setting Function
1-3 Short Pin 1 = +12V
3-5 Short Pin 1 = +5V
5-7 Short Pin 1 = +5V
1
7-9 Short
(default)
Pin 1 = DCD@RS232, TX-@RS422,
DATA-@RS485(Half Duplex),
TX--@RS485(Full Duplex)
2-4 Short Pin 9 = +12V
4-6 Short Pin 9 = +5V
6-8 Short Pin 9 = +5V
2
8-10 Short Pin 9 = RI (default)
Table 4 P7-11, JP13-16, COM2-10 Port Signal / Power Selection
Jumper Setting Function
1-3 Short Pin 1 = +12V
3-5 Short Pin 1 = +5V
5-7 Short Pin 1 = +5V
1
7-9 Short Pin 1 = DCD@RS232 (default)
2-4 Short RI Pin = +12V
4-6 Short RI Pin = +5V
6-8 Short RI Pin = +5V
2
8-10 Short RI Pin = RI (default)