Table of Contents
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RS232 pinout
PIN
1
2
3
4
5
6
7
8
9
About the LED indicators
The ICUSB23208FD features a set of transmit and receive LEDs for all of the eight ports.
For more information about what the LEDs signify, see the table below.
LED
Transmit LED (yellow)
Receive LED (green)
Quick-start guide
Signal
DCD
RxD
TxD
DTR
GND
DSR
RTS
CTS
RI
LED behavior
Blinking
Not illuminated
Blinking
Not illuminated
3
1
6
Significance
Data is being transmitted
through the port.
No data is being transmitted
through the port.
Data is being received through
the port.
No data is being received
through the port.
5
9
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