Boosting comfort and control
May 1st 2008 ABB has expanded its Alpha bs
range of light switches, with a new
comfort switch and a two-gang
'memory' touch dimmer.
The comfort switch can be set to
four different control options to
provide a combination of manual
and automated switching of lights.
The first option provides basic
on/off operation of lighting. The
second and third options enable
the user to set the light switch to a
manual on/automatic off or
automatic off/manual on setting.
The switch uses a sensor that
enables lights to automatically be
switched on or off in response to
movement in a room. With a 170°
range, this sensor reaches up to
5m directly in front and 3m to
either side. A time delay, ranging
from 1 to 10min.
Also included is an override
function. The switch detects
movement and overrides the
automatic off setting, keeping the
light on until the person exits the
occupied area.
The fourth option provides full
automatic switching, turning the
lights on and off as people enter
and exit an area. As with the semiautomatic
settings, the amount of
time the light is kept on after an
area is occupied can be pre-set.
The two-gang touch dimmer can
be used to control two different
lights. Each rocker can control an
independent lighting circuit. The
'memory' dimmer can be used in a
dual frame to create a four-gang
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