Technical data

QUICKTRONIC
®
Intelligent DALI DIM | Additional properties of dimmable control gears from OSRAM
28
4.5 Basic circuits in 1…10-V control gears
The simplest type of light management system can be exe-
cuted via a corresponding logarithmically dimensioned poten-
tiometer (available from electrical retailers). As the control
power of the OSRAM DIM ECG is produced by the ECG itself,
the resistance value depends on the number of connected
ECGs. It is calculated according to the following formula:
If the calculated value is not included in the resistance table,
a similar value should be selected, because otherwise full
modulation of the lamps is not possible (this overdimension-
ing may lead to the entire rotation angle of the potentiome-
ter not being utilized for brightness control). The potentiom-
eter must be designed for power of at
least.
An additional mains switch is required for switching the
lighting installation. When connecting the potentiometer,
it must be ensured that the full lighting level is achieved by
turning to the right. The use of a DIM MCU (manual control
unit) is recommended when connecting more than two
OSRAM DIM ECGs. The relevant documentation (user
instructions, LMS portfolio) contains detailed information
on this. The following diagram illustrates the control using
a potentiometer:
4.5.1 “Standby” operating modes with the 1…10-V
interface
OSRAM DIM ECGs dim the light down in standby mode
(1 % luminous fl ux) when it is not needed. This avoids un-
necessary switching processes and saves energy. Addi-
tional advantages of standby switching: As the light is not
completely switched off, a certain amount always remains
as an orientation light. If needed, a large amount of light is
immediately there without having to wait for a preheating
time. Typical applications for standby switching are all ap-
plications with high switching frequency, such as the stair-
well, corridor or basement garage, particularly if the light is
controlled by a motion sensor or timer.
4.5.1.1 Applications
a) “Standby switching” with staircase light timer
A special staircase light timer (e. g. Siemens: Type 5TT1
303) is responsible for standby switching of the OSRAM
DIM ECG. Operating principle: When the push-button is
pressed, the staircase light timer switches on the OSRAM
DIM ECG (100 % light). After max. 10 min (time is adjust-
able), the light sinks to a preselectable level without inter-
mediate stages. Shutdown completes after a total of
30 min. This 30-minute cycle is started again at any time
by pressing the push-button. The lamp-friendly standby
operation shows its worth in the evening hours when the
stairwells are highly frequented. The light changes only be-
tween the dimmer settings; real switchings are rare. Over-
night, when the staircase light is not needed for a long peri-
od, the remaining power consumption can also be saved in
the lowest dimmer setting.
Potentiometer control of the 1…10-V interface
DIM ECG
DIM ECG
+
+
4
4
–
–
3
3
N
N
N
1
1
L
L
On/off
switch
Potentiometer
100 kΩ log.
n
n: number of connected ECGs
R =
L
2
2
Lamp
Lamp