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CS331-C246/Q370
Chapter 2
- Hardware Installation
16
COM1/COM2 RS232/422/485 Select
2
2
G2
I C
Ba
ttery
JP1/JP2/JP3 (for COM 1) and JP6/JP8/JP10 (for COM 2) are used to configure the COM ports
to RS232, RS422 (Full Duplex) or RS485. When COM 1 RS232/422/485 is selected, JP1 and
JP2 must be set in accordance to JP3. When COM 2 RS232/422/485 is selected, JP6 and JP8
must be set in accordance to JP10. The pin functions of the COM ports will vary according to
the jumpers’ setting.
COM 2
COM 1
JP8 (COM 2)
2
1
9
JP1 (COM 1)
JP3
(COM 1)
JP2
(COM 1)
JP6 (COM 2)
JP10 (COM 2)
▼
JP3 (COM1)/JP10 (COM2)
▼
COM 1/COM 2
1 2 3 4 5
6 7 8 9
1-3, 4-6 On:
RS232 (default)
3-5, 4-6 On:
RS422 Full Duplex
3-5, 2-4 On:
RS485
2
4 6
1 3
5
2
4 6
1 3
5
2
4 6
1 3
5
2
1
9
Pin
RS232
RS422 Full Duplex
RS485
1
DCD-
RX+
DATA+
2
SIN-
RX-
DATA-
3
SO-
TX+
NC
4
DTR-
TX-
NC
5
GND
GND
GND
6
DSR-
NC
NC
7
RTS-
NC
NC
8
CTS-
NC
NC
9
RI-
NC
NC
▼
JP1/JP2 (COM 1)
1-3, 2-4 On:
RS232 (default)
3-5, 4-6 On:
RS422 Full Duplex
3-5, 4-6 On:
RS485
▼
JP6/JP8 (COM 2)
2
4 6
1 3
5
2
4 6
1 3
5
2
4 6
1 3
5
1-3, 2-4 On:
RS232 (default)
3-5, 4-6 On:
RS422 Full Duplex
3-5, 4-6 On:
RS485
2
4 6
1 3
5
2
4 6
1 3
5
2
4 6
1 3
5
►
Jumper Settings