DFI EC300 Series - Manual (Page 57)

57
4
Jumper Settings
VGA
COM1 and COM2 RS232/Power Select
JP12
JP14
1
6
5
2
JP12 (COM1) and JP14 (COM2) are used to confi gure COM1 and COM2 to pure
RS232 or RS232 with power.
The pin function of COM1 and COM2 will vary according to JP12’s and JP14’s set-
ting respectively.
JP12 / JP14
COM 1 / COM 2
1-3, 2-4 On:
RS232 (default)
6 4 2
5 3 1
3-5(+12V), 4-6(+5V) On:
RS232 with power
6 4 2
5 3 1
DCD TXD RXD DT
R
GND
1 2 3 4 5
6 8 9 7
DSR CT
S
RT
S
RI
+5V TD RD DT
R
-
GND
1 2 3 4 5
RT
S
-
+12V DSR
-
CT
S-
6 7 8 9