User's Manual

Connection
USB Connection
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2.3. USB Connection
A standard USB cable (included in Kit) may be used to connect PC USB port with USB port on adapter.
Table 2-1. USB Connector Specification
2.4. Serial RS-232 connection
A standard Null-Modem cable (included in Kit) with DB-9 Female connectors on both ends may
be used to connect PC COM_X port with Serial port on adapter.
Adapter’s DB-9 male connector external view and pinout is shown on the Figure 2-2.
Figure 2-2. DB-9 Male connector
Table 2-2. DB-9 Male Connector Specification
Pin Signal Name Dir Description
1 5V_USB I +5 VDC Power Input
2 USB_D- I/O USB data minus
3 USB_D+ I/O USB data plus
4 GND - Ground
5 GND - Ground
Pin Signal Name Dir Description
1
N/C
1
1. N/C - Not connected
-
2 RX_IN I RS232 data input
3 TX_OUT O RS232 data output
4N/C O
5 GND - Ground
6N/C -
7 RTS_OUT O RS232 request to send active low
8 CTS_IN I RS232 clear to send active low
9N/C -