RE: Alarm to connect to CBus (excluding Comfort)

["K. C. Li" <li@xxxxxxxxx>]

On Mon, 2 Jun 2008, Mike Griffiths wrote:

> The main difference is in the connection
> With C-bus if you cut the cable the PIR stops working and possibly the
> whole C-bus network !

It depends on how the C-Bus system is wired. If it is wired radially, as
it is commonly the case, cutting the wire would only disable that branch
without affecting other branches.

> With an alarm system if the cable gets cut the alarm goes off as the
> alarm system is still working

I am not advocating the use of a C-Bus system as a security system but
there is nothing inherently designed or omitted in C-Bus to make it
impossible to achieve. There are enough spare wires in the C-Bus cable to
allow for a simple temper circuit to be incorporated. eg. Connecting the
"temper circuit" of a closed loop to a L5504AUX Auxiliary Input
Unit to
detect an open circuit and trigger something within C-Bus.

Regards,

Kwong Li
li@xxxxxxx
Laser Business Systems Ltd.
http://www.laser.com
http://www.cbus-shop.com


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