DFI ES121-LR User Manual
Page 35
35
4
Jumper Settings
COM 2 RS232/RS422/RS485 Select
JP5
1-2 On: RS232
(default)
3-4 On: RS422
Half Duplex
5-6 On: RS485
6
4
2
5
3
1
JP5 is used to configure COM 2 to RS232, RS422 (Half Duplex) or RS485.
The pin function of COM 2 will vary according to the jumper’s setting.
6
1
5
2
JP5
COM 2
6
4
2
6
4
2
5
3
1
5
3
1
1
9
2
DCD-
TD
RD
D
TR
-
GND
R
T
S-
DSR
-
CT
S-
RI
-
1
9
2
RXD+
N.C.
RXD-
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
1
9
2
DA
TA+
N.C.
DA
TA
-
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
COM 2