OSRAM QUICKTRONIC INTELLIGENT DIM CFL - Manual (Page 43)

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Figure 23: DALI parameters that can be changed by the DLT
3.5 Basic switching actions of 1…10 V control gear
The simplest type of light control can be realized via an appropriate
logarithmically-dimensioned potentiometer (available from the electri-
cal trade). Because the control power of the OSRAM DIM ECG is
generated by the ECG itself, the resistance value is dependent on the
number n of the connected ECG. It can be calculated according to
the formula:
n
k
R
Poti
log 100 Ω
=
If the calculated value is not contained in the resistance table, a similar
value should be selected as otherwise full modulation of the lamps is
not possible (this overdimensioning may possibly lead to the fact that
the whole rotation angle of the potentiometer for the brightness con-
trol cannot be used). The potentiometer must be designed for at least
a power of P
Potentiometer
= 2.8 mW · n.
A mains switch is also required for switching the lighting system. When
connecting the potentiometer, it is important to note that the full light-
ing level is reached by turning to the right. When connecting more
than 2 OSRAM DIM ECGs, it is recommended to use a DIM MCU
manual control. Detailed information on this can be found in the rel-
evant documentation (LMS portfolio, see www.osram.com/ecg-lms).