Universal dimmer actuators GDA2K-400 KNX / GDA4K-400 KNX
pdated: Mai-17 (Subject to changes) Page 53 of 63
4.4 Dimming LED lamps
4.4.1 General
The dimmer may only operate LED lamps for 230V mains operation (so-called retrofit lamps), which
are exclusively identified as dimmable.
In dimming response, there are also manufacturer- and type-related differences. For that reason we
recommend only operating lights of the same type in parallel on one channel.
•
The maximum output per channel is 400 W (trailing edge/RC mode), or 60 W (leading edge/L
mode).
In parallel operation of both channels, a maximum of 800 W (trailing edge/RC mode),
or 120 W (leading edge/L mode).
•
The minimum output per channel is 5 W
It may be necessary to adjust the "minimum dimming value" for each parameter.
4.4.2 Selection of RC or L response:
Alongside the recommendations of the LED manufacturer, the following applies:
LEDs are typically operated in RC mode in order to reduce the activation currents of the lamps, which
can lead to disruptions in the power network.
RC mode is therefore especially to be recommended at high outputs.
Another advantage: Less heat is generated in the dimmer.
L mode:
Only use LED if a disruptive flickering is noted when dimming up or down.
Note:
Some types of lamps can cause an overload in L mode, which automatically leads to the dimming
down of the load.
In this case, automatic load detection must be selected (i.e. RC mode).
