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2.4.4
COM1 Connector (CN9)
This is a high rise 9-pin D-Sub connector for COM1 serial port interface. The pin
assignments of RS-232/422/485 are listed in table below.
Pin
RS-232
[**]
1
DCD#
2
RXD
3
TXD
4
DTR#
5
GND
6
DSR#
7
RTS#
8
CTS#
[**]
9
RI#
[*]
: Signals of COM1 can be RS-232/422/485 by selecting JP3, JP5 and JP6
(see section 2.3.3).
[**]
Note
selecting JP4 (see section 2.3.4).
Board and Pin Assignments
[*]
[*]
RS-422
RS-485
TX-
485-
TX+
485+
RX+
N/C
RX-
N/C
GND
GND
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
: Pin 1 of COM1 can be DCD/+5V and pin 9 of COM1 can be RI/+12V by
IMB502 LGA1151 ATX Motherboard
[*]
13
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