Fortec Star iBASE IB836 Series Manual page 30

2.5.1 COM1 RS-232/422/485 Port (CN4)
COM1 port is jumper-less and configurable in BIOS.
Pin Assignment
1 DSR, Data set ready
2 Ground
3 Ground
4 TX, Transmit
5 RX, Receive
Assignment
Pin
RS-232
1 DSR
2 Ground
3 Ground
4 TX
5 RX
6 DCD
7 DTR
8 CTS
9 RTS
10 RI
20
Pin Assignment
6 DCD, Data carrier detect
7 DTR, Data terminal ready
8 CTS, Clear to send
9 RTS, Request to send
10 RI, Ring Indicator
RS-422 RS-485
NC NC
Ground Ground
Ground Ground
RX+ NC
TX+ Data+
TX- Data-
RX- NC
NC NC
NC NC
NC NC
IB836 User's Manual