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P u t t i n g
t h e
s y s t e m
P A G E 2 0
i n t o
o p e r a t i o n
3.3
Earthing of the system
For EMC reasons an earthing via the earthing screw must be carried out in ei-
ther case.
ATTENTION
Earthing
A lacking earthing can cause functional deficiencies within the unit. Because
of the "pending" potential, unlike the protective earth conductor potential,
!
slight electric shocks can occur by touching the rack. These are absolutely not
dangerous, however they can be avoided totally by earthing.
3.4
Operational elements on the front side
The system has an illuminated graphical display with a resolution of 160 x 32
pixel and 19 operating buttons.
On the right next to the display there are two softkeys whose current func-
tions are indicated on the display. In the middle there are two cursor buttons
(upwards/downwards) as well as an
in addition to the numerical characters
tries the numerical pad can also be used as a normal keypad.
During a connection additional functions are possible that are explained in
chapter 5 - "Operation via display and keypad".
FIG. 3
Graphical
Softkeys
display
OK
button. The numerical pad supports
0...9
OPERATIONAL ELEMENTS ON THE FRONT SIDE
Confirm entry
Status window/
cursor buttons/
Headset level
up/down
*
#
, the '
'- and '
'-key. For text en-
Keypad for dailing/
text entry
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