Re: DIN Rail Dimmer Problems :-(

["Dr John Tankard" <jtankard@xxxxxxx>]

Mark, is this happening on only one circuit ?

if so I would think that a _small_ filter, perhaps even a ferrite ring at
the x10 module may be enough to block the interference without killing the
correct signal.

if not you could wait for my hard wired system to come out, but then that's
going to be a bout 2 months after Keith's video over cat 5 ;-)))

John
jtankard@xxxxxxx

> -----Original Message-----
> From: Mark McCall [mailto:mark@xxxxxxx]
> Sent: 04 August 1999 10:04
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] DIN Rail Dimmer Problems :-(
> Importance: High
>
>
> Hi all
>
> I just thought I'd pass on some info to any of you considering fitting
DIN
> Rail Dimmers (LD10s) especially in a "new build".
>
> The electrician's finally got the lights on in our new house yesterday
(we
> move in this Friday).  However, soon the hall lights started to dim
and
> brighten themselves as if someone was holding there finger on the
switch!
>
> Apparently in long cable runs (and to X10 that seems to mean anything
over
> just 10m) cables that are side by side can induce a current across one
> another, fooling the LD10 into thinking someone is holding the
> switch down!!
>
> I spoke to various people yesterday (thanks to Keith, Mike, Kwong and
> George).  The main outcome of this was that this is a problem
> that X10 know
> of but have yet to address or publicise!  I also received some advice
for
> installing the dimmers.  I post it below for everyone's info.  I will
be
> adding this to the reviews of these modules soon. Just a pity X10
didn't
> have this in their documentation then I could have taken it on
> board.  As my
> walls are now plastered and the upstairs floors down it makes
correcting
> these problems very difficult!
>
>
> A.Leave some space between the DIN rail dimmers. Two against one
> another is
> OK, but it's better not to
> have three together. At one of its sides, a DIN rail dimmers
> needs about one
> centimetre of space in order to avoid side-effects due to heating.
>
> B.When wires run too close to one another, some weird behaviour can
occur.
> It seems it does not happen if the
> length of the wiring is less than about 10 meters. Above that, X-10
> recommends separating the wires.
>
> C.Where it is impossible to separate the wires a mains relay at
> module level
> should fix the problem.
>
>
> Regards
>
> Mark McCall
> http://come.to/homeautomation
>
>
>
>
>
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