User Manual

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Siemens Switzerland Ltd DS02 Update: http://www.siemens.com/gamma-td
Building Technologies Divison
International Headquarters
Theilerstrasse 1a  Siemens AG 2018
6300 Zug Subject to change December 2018
Commissioning of dimmable LED and CFL
Not all LED and CFL are dimmable, because they have electronic components included. Only
dimmable lamps can be dimmed properly. Lamp manufactures note this feature on lamps, on
packages or in the datasheets. The maximum load also depends on operating mode, current
peak.
Dimmable LED CFL LED retrofit LED driver
LED driver can control LED via constant current or voltage and are similar to “Low voltage hal-
ogen lamps with electronic transformers”
LED “Retrofit” lamps have a built-in LED driver, replace mostly incandescent lamps and fit into
standard sockets (E27, E14, …).
Operation mode for load control
Always prefer the recommended operation mode of the lamp manufacturer.
Universal dimmers support two kinds of operation modes:
• Leading Edge:
Mostly used to get a proper dimming behavior and the lamp can be dimmed very
smooth.
• Trailing Edge:
Mostly used to control more or higher load at the output, because there is less power-
loss.
Note:
Dimming of inductive loads with trailing edge mode is not permitted.
Automatic load detection
The universal dimmer sets LED mostly in “Trailing edge mode”. Via parameter settings the
mode can be changed in two options:
• optimized dimming behavior
• less power-loss to control higher loads.
Fig. 4 Dimmable LED and CFL