RE: Automating the Electric Projection screen

["ewenjc" <ewenjc@xxxxxxx>]

This might be a few days late but I've only just got upt date reading about 100 digest messages after a few days away.

 

You need to be careful if it comes with a none standard switch.  The roof vents in our conservatory had a switch with two rockers; one t open and one t close.  The motor would work fine if it got live on the open or close wire but it might "blow-up" if it got power on both.  To stop this happening the switch would only fed power t the second rocker if the first was not active.  I would imagine the projector screen could have a similar motor.

 

If you are replacing this type of switch don't feed both relays with live but feed the second relay with the N/C (is this the right one, its the one you don't normally use) of the first relay.  My roof vents have two manual rocker switches and two relays (driven by comfort) configured so only one can be live at once and if two are pressed it will close (I thought this was safest for security reasons).

 

-Ewen

 

Message: 23
   Date: Fri, 27 Jul 2001 22:58:38 +0100
   From: "Keith Doxey" <ukha@xxxxxxx>
Subject: RE: Automating the Electric Projection screen

Any device that operates using switches can have relays fitted instead of
the switches.

Homevision or any other controller with digital output ports can control the
relays.

Typical cost of a relay .....about 1-2 quid.

Keith

> -----Original Message-----
> From: Kenneth Watt [mailto:kennethwatt@xxxxxxx]
> Sent: 27 July 2001 19:32
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Automating the Electric Projection screen
>
>
> Keith,
>
> Please tell me more, I'm due to get an electric screen real soon and if
> I can save buying a £65 module you'll make me a happy bunny for while.
>
> Ta
>
> K.
>
> -----Original Message-----
> From: Keith Doxey [mailto:ukha@xxxxxxx]
> Sent: 27 July 2001 11:55
> To: ukha_d
> Subject: RE: [ukha_d] Automating the Electric Projection screen
>
> Darren,
>
> Have you got a HomeVision ?
> If so, a couple of small relays will do the trick.
>
> Keith
>
> -----Original Message-----
> From: Henderson, Darren [mailto:Darren.Henderson@xxxxxxx]
> Sent: 27 July 2001 11:26
> To: 'ukha_d@xxxxxxx'
> Subject: [ukha_d] Automating the Electric Projection screen
>
>
> I know phil has done this with the SW10G X10 module.
>
> But how do you mount this
> Is there a front panel for it, for local control as well (It's a bit
> Ugly in
> the pics)
> Does it need a wall box
> and What does 'European style' actually mean ?.
>
> I want t do this as neatly as possible, hence the questions.
>
> Cheers
>
> Darren
>
>
>
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