Chapter 2 – DFI BT100 User Manual
Page 16
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16
Chapter 2 Hardware Installation
Chapter 2
COM 1/COM 3 RS232/422/485 Select
Note:
When COM 1 RS232/422/485 is selected, JP1 and JP2 must be set in accordance to
JP4. When COM 3 RS232/422/485 is selected, JP7 and JP8 must be set in accordance
to JP12.
JP2
COM 3:
RS232/422/485
6
4
2
5
3
1
6
4
2
5
3
1
2
1
9
COM 1:
RS232/422/485
JP4 (for COM 1)/JP12 (for COM 3)
5-6 On: RS485
COM 3
6
4
2
5
3
1
1-2 On: RS232
(default)
3-4 On: RS422
Full Duplex
6
4
2
5
3
1
6
4
2
5
3
1
RS232
2
1
9
RXD
DCD- TXD
D
TR
-
GND
DSR
-
RT
S-
CTS-
RI
-
RS422
Full Duplex
2
1
9
RXD-
RXD+ TXD+
TXD-
NC.
NC.
NC.
NC.
NC.
RS485
2
1
9
D
ATA
-
D
ATA
+
TXD
NC.
NC.
NC.
NC.
NC.
NC.
COM 1
RS485
D
ATA
+
D
ATA
-
N.C.
N.C.
N.C.
1 2 3 4 5
N.C. N.C. N.C. N.C.
6 7 8 9
RS422
Full Duplex
RXD+
TXD+
RXD-
TXD- N.C.
N.C. N.C. N.C. N.C.
1 2 3 4 5
6 7 8 9
RS232
DCD-
TD
RD
DT
R-
GND
RT
S-
RI
-
DSR
-
CTS-
1 2 3 4 5
6 7 8 9
These jumpers allow you to configure the Serial COM ports to RS232, RS422 (Full Duplex) or
RS485. JP1, JP2 and JP4 are used to configure the Serial COM port 1. JP7, JP8 and JP12 are
used to configure the Serial COM port 3. The pin functions of Serial COM port 1 and COM port
3 will vary according to these jumpers’ setting.
JP1
JP4
JP7
JP1 and JP2 (for COM 1)/JP7 and JP8 (for COM 3)
1-3, 2-4 On:
RS232 (default)
3-5, 4-6 On:
RS422 Full Duplex/RS485
JP12
JP8