Jumper Settings; Com2 Rs232/Rs422/Rs485 Select - DFI Q7-951 User Manual

2
Hardware Installation

Jumper Settings

COM2 RS232/RS422/RS485 Select

JP1 is used to configure COM 2 to RS232, RS422 (Full Duplex) or RS485.
The pin function of COM 2 will vary according to the jumper's setting.
1
3
5
1-2 On: RS232
(default)
DCD-
TD
GND
RTS-
RI-
RS232
12
COM2
JP1
2
4
6
1 2
RD RXD+
DTR-
DSR-
CTS-
9
JP1
1
2
3
4
5
6
3-4 On: RS422
Full Duplex
COM 2
1 2
RXD-
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
9
RS422
Full Duplex
1
2
3 4
5
6
5-6 On: RS485
1 2
DATA-
DATA+
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
9
RS485