User`s manual
ZEBEX INDUSTRIES INC.
Subject Version DatePage
Z-2121 series User’s Manual 2.00 2011/4/12 20 / 49
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