User Manual

5-2
Siemens Switzerland Ltd www.siemens.com/gamma 2019
Building Technologies Division
Lighting
Overview
Dimmers
Channel bundling of up to four channels for high output
Strong illumination can be realized by bundling channels up to 100
VA. Bundling two channels increases the output to 300 VA and 500
VA. Bundling three channels increases the output to 750 VA and four
channels to 1,000 VA. Adjacent channels can be bundled as follows:
A+B|C|D, A|B+C|D, A|B|C+D, A +B|C+D, A+B+C|D, A|B+C+D and A+B
+C+D.
Universal dimmer for LEDs and conventional illuminants
The new universal dimmer N 554 in the new design with DIN rail-
mounted devices expands the Siemens GAMMA instabus lighting
control product range. Its four independent channels enable the new
product to deliver seamless dimming adjustment for dimmable LED
retrofi t bulbs and bulbs in all other dimmable categories, with no
minimum load. The universal dimmer‘s front panel makes it easy to
check and operate. Channel bundling allows outputs to be combined
so the load can be increased up to 1,000 VA.
Intuitive front panel
Status LEDs and push-buttons permit convenient operation at the
front panel to check the installation. With one click, users can switch
and dim the ballasts, confi gure the channel bundling, and detect
faults. Channel bundling can be adjusted directly, without ETS.
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% % % % % % % % % %
LED
Bulb
Brightness
in percent.
Illuminance in percent.
LED dimming behavior
adjustable comparable to a bulb
Adjustable dimming curves
For greater comfort and fl exibility, the universal dimmer offers the
option to adjust the dimming behavior of LEDs so that it resembles
that of conventional bulbs. The graph shows the typical dimming
behavior of an LED compared with a bulb. In the ETS, users can adjust
the setting of the LED dimming curve to parametrize the control of
brightness relative to dimness. These bulbs can be dimmed brighter or
darker in the mid-dim region.
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