MagTek uDynamo - Manual (Page 10)

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SECTION 3: INDICATORS AND ANNUNCIATORS
The uDynamo has a single tri-color LED to provide user feedback. Other user prompts and
feedback may be provided via the host’s user interface under the control of the software on that
host. The LED is sufficiently bright that it may be seen outdoors in bright, diffuse (slightly
overcast) lighting conditions.
The LED indicator reflects the status of the uDynamo. When the uDynamo is off, the LED will
be off. When the device is first powered on, the LED will reflect the startup sequence while the
device is initializing.
POWER ON WITH AUDIO INTERFACE
When powering on the device while connected to the Audio interface, the LED will very quickly
flash Red once after a device self check. If the battery voltage is low but still operational, the
LED will light up Red for an additional 2 seconds. After this startup sequence, the LED will
change to reflect the current state/status of the reader. Refer to the table below for more detail.
POWER ON WITH USB INTERFACE
When powering on the device while connected to the USB interface, the LED will very quickly
flash Red once after a device self check. While establishing communications with the USB host
device (e.g., a PC), the LED will flash Green numerous times until this startup sequence is
complete. After this startup sequence, the LED will change to reflect the current state/status of
the reader. Refer to the table below for more detail.
CARD SWIPES
After swiping a card, the LED will temporarily shut off while the reader is processing data.
Once the processing is complete, the LED will either turn Green for 2 seconds to indicate a good
card read or turn Red for 2 seconds to indicate a bad card read. Afterwards, the LED will change
to the appropriate state. Refer to the table below for more detail.