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16
Chapter 2 Hardware Installation
Chapter 2
COM1/COM2 RS232/422/485 Select
JP5/JP6/JP7 (for COM1) and JP1/JP2/JP3 (for COM2) are used to configure the COM ports to
RS232, RS422 (Full Duplex) or RS485. When COM 1 RS232/422/485 is selected, JP6 and JP7
must be set in accordance to JP5. When COM 2 RS232/422/485 is selected, JP2 and JP3 must
be set in accordance to JP1. The pin functions of the COM ports will vary according to the
jumpers’ setting.
JP3
JP5
COM 2
COM 1
JP6
JP7
JP2
JP1
10
2
1
9
10
2
1
9
1
3
5
2
4
6
1
3
5
2
4
6
1
3
5
2
4
6
2
4
6
1
3
5
JP5 (COM 1)/JP1 (COM 2)
COM 1/COM 2
1 2 3 4 5
6 7 8 9
1-2 On:
RS232 (default)
3-4 On:
RS422 Full Duplex
5-6 On:
RS485
2
4 6
1 3
5
2
4 6
1 3
5
2
4 6
1 3
5
Pin
RS232
RS422 Full Duplex
RS485
1
DCD-
RXD+
DATA+
2
RXD
RXD-
DATA-
3
TXD
TXD+
N.C.
4
DTR-
TXD-
N.C.
5
GND
GND
GND
6
DSR-
N.C.
N.C.
7
RTS-
N.C.
N.C.
8
CTS-
N.C.
N.C.
9
RI-
N.C.
N.C.
JP6/JP7 (COM 1)
1-3, 2-4 On:
RS232 (default)
3-5, 4-6 On:
RS422 Full Duplex
3-5, 4-6 On:
RS485
JP2/JP3 (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
1
3
5
2
4
6
2
4
6
1
3
5