Chapter 2 Hardware Configuration
BM-0947 USER
′
S MANUAL
Page: 2-7
2-4. COM PORT
COM1, COM5:
COM Port, fixed as RS-232
PIN
ASSIGNMENT
PIN
ASSIGNMENT
1
DCD#
6
DSR#
2
RX
7
RTS#
3
TX
8
CTS#
4
DTR#
9
RI#
5
GND
COM2:
COM2 Connector, selectable as RS-232/422/485
Co-lay with the other COM port stacked over COM1.
ASSIGNMENT
PIN
RS-232
RS-422
RS-485
1
DCD#
TX-
RS-485-
2
RX
TX+
RS-485+
3
TX
RX+
X
4
DTR#
RX-
X
5
GND
GND
GND
6
DSR#
X
X
7
RTS#
X
X
8
CTS#
X
X
9
RI#
X
X
5
1
9
6
COM1/
COM5
/
5
1
9
6
COM2