DFI ES121-LR - 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