DFI EC300 Series, User Manual

Page: 99 / 208

99
5
Ports and Connectors
COM 3 to COM 6 RS232/Power Select
JP3, JP4, JP6 and JP7 are used to con fi gure COM 3 to COM 6 to pure RS232 or
RS232 with power.
The pin function of COM 3 to COM 6 will vary according to JP3’s, JP4’s, JP6’s and
JP7’s setting respectively.
JP3 / JP4 / JP6 / JP7
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
COM 3 / COM 4 / COM 5 / COM 6
JP3
JP6 JP4
JP7
COM 3
(JP3)
COM 4
(JP6)
COM 5
(JP4)
COM 6
(JP7)