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26 SBC-455 User's Manual
Serial ports
The SBC-455 offers two RS-232 serial ports. You can select or
disable the address for each port with the BIOS Peripheral Setup
program.
The card mounting bracket holds COM A, the DB-9 serial port
connector for the first port. The parallel port and serial port
adapter kit (supplied with the card) holds COM B, the DB-9
connector for the second port. This lets you connect and discon-
nect the cables after you install the card. The following sections
tell how to make RS-232 connections.
RS-232 connections (COM A, COM B)
The following table shows the pin assignments for the card's RS-
232 ports:
RS-232 connector pin assignment (COM A, COM B)
Pin Signal
1 DCD
2RX
3TX
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9RI