COMMELL FS-A78 - Manual (Page 30)

FS-A78 User’s Manual
- 28 -
2.11
The board supports Three RS232 serial port and one jumper selectable
RS232/422/485 serial ports. The jumper JCSEL1 & JCSEL2 can let you configure
the communicating modes for COM2.
Connector: COM1/3/4/5/6
Type: 9-pin D-sub male connector on bracket for COM1
Pin Description Pin Description
1 DCD 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 RI 10 N/C
Connector: COM2
Type: 9-pin D-sub male connector on bracket for COM2
Pin Description Pin Description
1 DCD/422TX-/485- 2 RXD/422TX+/485+
3 TXD/422RX+
4 DTR/422RX-
5 GND 6 DSR
7 RTS 8 CTS
9 RI 10 N/C
Setting RS-232 & RS-422 & RS-485 for COM2
1
2
11
12
8
7 1
2
6 5
2 1
JP1 JP2
JCSEL1
JCSEL2
6 5
2 1