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Chapter 1 Names and Functions
Note: The bottom case is not securely held in the scanner case when the interface cable and its connector case cover are not
plugged into the case. If the bottom case comes off, fit it firmly in the scanner case again, and connect the interface cable and
then the connector cover over it.
Reading window
Barcode is placed at this
reading window.
LED indicator
Illuminates blue when
reading is complete.
Beep hole
The beeper sounds when the
scanner has read a barcode
successfully.
Case
・AT20B:Light gray
・AT21B:Black
Bottom Case
Trigger switch
Press this switch to start Barcode reading.
The following trigger switch operating modes
are available.
• Auto-off mode
• Momentary switching mode
• Momentary switching mode
(Reverse Type)
• Alternate switching mode
• Continuous reading mode 1
• Continuous reading mode 2
• Auto sensing mode
• Auto stand mode
(The factory default setting is
uto-off mode .)
Interface cable
There are two types of interface cables available.
- RS-232C interface cable
- USB interface cable
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