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2.3.1.1
COM Connector
ARK-3531 provides up to eight D-sub 9-pin connectors, which offers RS-232/422/485
serial communication interface ports. The default setting is RS-232, the mode RS-422/
485 of ARK-3531 COM1/2/5/6 can be supported via the BIOS settings. Optional
COM3/4/7/8 supports RS-232.
Table 2.2: COM Connector Pin Assignments
Pin
1
2
3
4
5
6
7
8
9
Note!
NC represents "No Connection".
ARK-3531 User Manual
1 2 3 4 5
Figure 2.3 COM Connector
RS-232
Signal Name
DCD
RxD
TxD
DTR
GND
DSR
RTS
CTS
RI
6 7 8 9
RS-422
RS-485
Signal Name
Signal Name
Tx-
DATA-
Tx+
DATA+
Rx+
NC
Rx-
NC
GND
GND
NC
NC
NC
NC
NC
NC
NC
NC
12
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