Com (Serial) Ports - DFI AL173 User Manual

COM (Serial) Ports

COM 1/COM 2:
RS232/422/485
(Refer pin functions at right)
COM 3/COM 4/COM 5/COM 6:
COM 1
RS232
COM 2
COM 3
COM 4
9 1
COM 5
2
COM 6
COM 1 and COM 2 can be selected among RS232, RS422 and RS485. COM 3 to COM 6 are
fixed at RS232.
The pin functions of COM 1 and COM 2 ports will vary according to JP2's and JP5's setting re-
spectively. JP2 and JP5 are used respectively to configure the Serial COM port 1 and the Serial
COM port 2 to pure RS232 or RS232 with power. Refer to "COM 1/COM 2 RS232/Power Select"
in this chapter for more information.
The serial ports are asynchronous communication ports with 16C550A-compatible UARTs that
can be used with modems, serial printers, remote display terminals, and other serial devices.
Connecting External Serial Ports
Your COM port may come mounted on a card-edge bracket. Install the card-edge bracket to
an available slot at the rear of the system chassis then insert the serial port cable to the COM
connector. Make sure the colored stripe on the ribbon cable is aligned with pin 1 of the COM
connector.
BIOS Setting
Configure the serial COM ports in the Advanced menu ("SIO NUVOTON6116D" submenu) of
the BIOS. Refer to the chapter 3 for more information.
Chapter 2 Hardware Installation
Chapter 2
COM 1/COM 2 Port Connectors
Pin RS232
1
DCD-
2
RXD
TXD
3
DTR-
4
GND
5
DSR-
6
RTS-
7
CTS-
8
RI-
9
Note:
If you need to install the serial port cables and PCIe card, it will be easier to install
the serial port cables fi rst.
23
RS422
RS485
(Full Duplex)
RXD+ DATA+
RXD- DATA-
TXD+ NC
TXD- NC
GND GND
NC NC
NC NC
NC NC
NC NC
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