Hi Jeremy.
Why not just connect the 12v output from the DouCom "electric lock" output
into the 12v relay controlling the "Mains controlling" relay for the door
pump. Or get yourself another 12v relay.
http://www.gewa.se/svensk/laddahem/Manualer/Engelska/808470.pdf
If you are concerned about the variation of the DuoCom "18v" supply, use a
wide input DC-DC convertor to give you a regulated 12v.
Eg
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct
&R=0168743
Best regards,
Geoff.
-----Original Message-----
From: A discussion list for Assistive Technology professionals.
[mailto:[log in to unmask]] On Behalf Of Jeremy Linskell
Sent: 03 December 2008 10:34
To: [log in to unmask]
Subject: Ridley opener and Duocom
Hi All ..help!
We are installing a Duocom into a home that has a radio controlled
Ridley pneumatic door opener. Even though we have pointed out the that
the device is obsolete we have been told that there is no funding for a
new opener, so we will have to interface the Duocom to the Ridley
system. Unfortunately this doesn't appear to be as straight forward as I
would have hoped.. They appear to be using it to switch a 12vDC relay,
which in turn is switching a second relay that is directly toggling the
mains supply to the pneumatic pump for the opener.
It doesn't look realistic to try and solder the voltage free output of
the Duocom onto the receiver board at the input to the 12V relay, so the
only other possible (I say possible) alternative appears to be to use
the Duocom lock voltage output to directly switch the second relay!!!!
Unfortunately I can't seem to see any component info, so I don't know
ratings etc, so I don't even know if this is in the realm of consideration.
Has anyone come across this/a similar problem before, or is there anyone
from Ridley still around who could shed some light?
cheers
Jeremy
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