RE: Controlling 1 light with 2 switches

["Neil Ball" <neilball@xxxxxxxxxxxxxxx>]

I don't know anything about z-wave specifically but with lighting
controls
you often have a load controller that switches/dims the power and a
separate
keypad/controller that calls a scene or lighting level. If all of the
keypads are registered to a load controller then it is usual that calling
the scene/level on one is reflected on all of the others (as long as they
provide feedback). With wired systems then there is some kind of network or
bus linking the keypads and load controllers. With z-wave and other
wireless
systems such as Rako then the comms is wireless but the method of operation
will be similar.



So it is actually a programming exercise in most cases rather than
switching
logic that you have with conventional switch plates.



Neil B.



_____

From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
Duncan
Sent: 16 December 2008 16:37
To: ukha_d@xxxxxxx
Subject: [ukha_d] Controlling 1 light with 2 switches



Hi

After a little off-list discussion, I'm wondering if someone here has
an answer for a problem I may have in my new house.

Many houses have multiple light switches that control one set of
lights (eg. at the top and bottom of a staircase). How can this be
replaced by something like ZWave?

Since in the traditional system both switches work independently I
presume there's no easy way to know if the opposite switch has turned
the same light on or off.

Duncan





[Non-text portions of this message have been removed]


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