Tripp Lite USA-19HS User Manual page 30

Keyspan:USB Serial Adapter for Windows-v3.4 Manual
7.1.e - LED Behavior
The Keyspan USB Serial Adapter part number USA-19HS comes equipped with a green LED
light that reports the status of the Keyspan adapter USB hardware and serial port.
The following table shows all of the possible states of these LED light and what they mean:
Color
Green
On-Blinking Slowly
Green
Green
On-Blinking Rapidly
Green
This User Manual applies to the Keyspan USB Serial Adapter Software for Windows.
Rev 03jul13
State
Off
On-Steady Light
Significance
The Keyspan adapter is not connected or
not receiving power from your computer
The Keyspan adapter software and
hardware are working properly. The
Keyspan serial port is available for use.
The Keyspan serial port is 'in use' by an
application on your computer and is
ready to send and receive data to and from
your serial device.
The Keyspan serial port is sending and/or
receiving data
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