Connection of multiple ecgs – OSRAM OPTOTRONIC Constant current LED power supplies with 3DIM User Manual
Page 11
11
LEDset SPECIFICATIONS
2.3.8. Connection of multiple ECGs
Depending on the LEDset control gear, the Vset signals can
be connected in parallel to set the current of multiple ECGs
by a resistor. This connection is allowed in case of a local
dimming application on a luminaire supplied by more than
one ECG.
In general, if n is the number of ECGs to be connected to-
gether to a local dimmer or current setting resistance, Rset/n
is the resistance value to be considered (where Rset is the
value needed to set the current of one single ECG).
Example: an offi ce luminaire with two ECGs locally dimmed
by a 22 kΩ potentiometer.
Figure 5 shows a parallel connection of two LEDset inter-
faces. The interfaces share a resistor Rset, with which it is
possible to set the output current. Current setting by external
resistor is explained in detail in chapter 3.1.1.
Figure 5: Parallel connection of two LEDset interfaces.
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