User`s manual
ZEBEX INDUSTRIES INC.
Subject Version DatePage
Z-2121 series User’s Manual 4.00 2012/7/20 21 / 50
Note:
There are 2 LEDs and 2 holes at the front bottom of the
CRD-21 as shown in Fig 6. The 2 LEDs are located on the left
and right, whereas the two holes in the middle. The LED on
the left is illuminated when power is on, and will not be
illuminated if the power adaptor is not connected to the AC
output, or the 9VDC jack is not inserted into the
RS-232 connector. The LED on the right is illuminated when a
battery is put in the back slot of the cradle for recharge. It will
remain illuminated as long as recharging is going on until a full
charge is achieved. It flashes intermittently, however, when the
battery slot is empty, indicating that the cradle is detecting the
presence of the battery. The LED at the upper-right corner of
the terminal is illuminated when the terminal is placed on the
cradle for a recharge, and will be off when a full recharge is
achieved.
Prerequisites
Skills Required
The following skills are required by developers aiming to develop
application software for the ZEBEX Z-2121 series.
● Good knowledge of one or more of the following:
* C language