COMMELL HS-874P - Manual (Page 30)

HS-874P User’s Manual Hardware Setup
Power and Fan Installation 30
2.11 <Serial Port Jumper Setting >
The board supports one 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: CN_COM2
Type: 10-pin (5 x 2) 2.54mm x 2.54mm-pitch header 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
JCSEL1 JCSEL2
RS-232
RS-485
RS-422
IR
Default setting: RS-232
1
8
7
2
1
8
7
2
1
8
7
2
1
8
7
2
12
2
11
1
12
2
11
1
12
2
11
1
12
2
11
1