DFI EC300 Series - Manual (Page 92)

92
5
Ports and Connectors
COM Port
COM 1 and COM 2 are fi xed at RS232.
COM 1’s pin defi nition will vary according to its jumper setting. Refer to “COM 1
RS232/RS422/RS485 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.
COM 1 / COM 2
DCD TXD RXD DT
R
GND
1 2 3 4 5
6 8 9 7
DSR CT
S
RT
S
RI
RX+ TX+ RX
-
TX
-
GND
1 2 3 4 5
6 8 9 7
N.C. N.C. N.C. N.C.
D
ATA
+
N.C. D
ATA
-
N.C. GND
1 2 3 4 5
6 8 9 7
N.C. N.C. N.C. N.C.
RS232 RS422
Full Duplex
RS485