Re: Mains activated extension socket

["Karam Karam" <kzkaram@xxxxxxxxxxx>]

Seems to me that this requires a straightforward solution rather
than=20
an automation system. But if you're looking for insight into a=20
possible IDRATEK component solution then I'd guess an SRH-001 module=20
(13A fused relay + digital inputs) could act as the extractor=20
switching element as well as input sensing. You'd need to feed a=20
signal into one of the digital inputs to indicate machine is on. If=20
the machine has some sort of ON light then a phototransistor could be=20
attached over this (suitably masked to avoid ambient light effects)=20
and act as a digital input to the SRH. The SRH would need a 12V=20
supply but otherwise no further IDRANet networking components since=20
not part of a bus here. The actions of the SRH can be purely self=20
Reflex and this would allow delayed off period. The Reflex can be=20
programmed by IDRATEK prior to supply. Total Cost about =A360-=A370 I'd=20
say.

As I say this is purely for insight, otherwise a bit of a=20
seldgehammer to crack a nut ... :-)

Karam

IDRATEK LTD



--- In ukha_d@xxxxxxx, Chris Hunter <cjhunter@...> wrote:
>
> 'wonder if & how C-Bus or Idratek could help with this sort of=20
thing ?
>=20
> Chris
>=20
>=20
> On 4 Nov 2007, at 14:47, David Chapman wrote:
>=20
> > Automated Home Discussion> I need to turn on a dust
extractor=20=20
> > whenever a
> > woodworking machine is switched on (single phase, but let's
say=20
the=20=20
> > full 13
> > amps surge.)
> >
> > I had the same problem - and the current sensing device I had
on=20
a=20=20
> > workshop
> > vac didn't work well as there was a 5 second delay on startup.
> >
> > What I ended up using was a plug in "sound switch" that
I bought=20=20
> > from Maplin
> > some years ago. It is branded "Home Automation order code
6001"=20=20
> > Although it
> > says it is only rated 500w in practice I've found it is fine=20
with=20=20
> > double
> > that !!  Might not be the perfect solution but something with
a=20=20
> > sound sensor
> > could be the way to go.
> >
> > David C
>