OSRAM OPTOTRONIC Constant current LED power supplies with 3DIM - Manual (Page 11)

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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.