18
A
A
p
p
p
p
e
e
n
n
d
d
i
i
x
x
A
A
Pin outs and Connector
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USB Layout Diagram
Type A USB Connector
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RS-232 Pin Assignment
The pin assignment scheme for a 9-pin male connector is given below.
PIN 1 : DCD PIN 2 : RXD PIN 3 : TXD PIN 4 : DTR
PIN 5 : GND PIN 6 : DSR
PIN 7 : RTS PIN 8 : CTS
PIN 9 : X
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RS-232 Wiring Diagram
Serial Device US-101-232
2 RX 3 TX
3 TX 2 RX
5 GND 5 GND
7 RTS 8 CTS
8 CTS 7 RTS
(Flow Control)
(Flow Control)
