Com 1/ com 2 rs232/422/485 select, Com 1 / com 2 rs232/power select, Chapter 4 – DFI DT122-SB Manual User Manual
Page 19: Chapter 4 jumper settings
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19
Chapter 4 Jumper Settings
Chapter 4
COM 1/ COM 2 RS232/RS422/RS485 Select
5-6 On: RS485
JP1/JP6
6
4
2
5
3
1
RS232
RS422
Full Duplex
RS485
COM 1/ COM 2
DCD-
TD
RD
DT
R
-
GND
1 2 3 4 5
RT
S
-
RI
-
DSR
-
CT
S-
6 7 8 9
D
ATA
+
N.C.
D
ATA
-
N.C. N.C.
1 2 3 4 5
N.C.
N.C.
N.C.
N.C.
6 7 8 9
RXD+
TXD+
RXD-
TXD- N.C.
1 2 3 4 5
N.C.
N.C.
N.C.
N.C.
6 7 8 9
6
4
2
5
3
1
1-2 On: RS232
(default)
3-4 On: RS422
Full Duplex
6
4
2
5
3
1
COM1/COM2 RS232/Power Select
1
COM 1
COM 2
JP1
JP6
JP1 (for COM1) and JP6 (for COM2) are used to configure the COM ports to RS232, RS422
(Full Duplex) or RS485.
The pin function of the COM ports will vary according to the jumper’s setting.
1
1
3
5
2
4
6
JP3
JP5
1-3 (RI), 2-4 (DCD) On:
RS232 (default)
3-5 (+5V), 4-6 (+12V) On:
RS232 with power
1
3
5
2
4
6