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2.3.2
ARK-3520L Front I/O Connectors
2.3.2.1
USB2.0 Connector
ARK-3520 provides two USB2.0 interface connectors, which give complete Plug &
Play and hot swapping for up to 127 external devices. The USB interface complies
with USB UHCI, Rev. 2.0 compliant. The USB interface can be disabled in the system
BIOS setup. Please refer to Table. 2.2 for its pin assignments. The USB connectors
are used to connect any device that conforms to the USB interface. Most digital
devices conform to this standard. The USB interface supports Plug and Play.
* Support power on/off switch in suspend mode (By customize BIOS Request sup-
port) .
Table 2.2: USB 2.0 Connector Pin Assignments
Pin
1
3
2.3.2.2
COM Connector
ARK-3520 provides up to eight D-sub 9-pin connectors, which offers RS-232/422/485
serial communication interface ports. Default setting is RS-232, the mode RS-422/485
of ARK-3520 COM1~4 can be supported via BIOS setting. COM5~8 support RS-232.
Table 2.3: COM Connector Pin Assignments
Pin
1
2
3
4
5
6
7
8
9
ARK-3520L User Manual
Figure 2.4 USB2.0 connector
Signal Name
+5V
USB_data+
1 2 3 4 5
Figure 2.5 COM connector
RS-232
Signal Name
DCD
RxD
TxD
DTR
GND
DSR
RTS
CTS
RI
Pin
Signal Name
2
USB_data-
4
GND
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
14
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