Re: Fw: External PIR's

["Nick" <nick@xxxxxxxxxxxxxxx>]

Beware the choice of OPAL versus ELITE.  The ELITE has two outputs
and, from memory the OPAL only has one.  Fine for Comfort on its own,
but mine trigger the camera recording 24x7 and C-Bus lighting (via a
four channel aux unit) when it's dark - hence I needed two contacts.

On C-Bus, there is another gotcha - the GJD units have an open
collector output.  The C-Bus aux inputs are commoned "the wrong
way"
which results in very strange behaviour.  That leads to using a very
small relay in between.  By small, I mean low-current - beware the
GJD's limits and remember to put in a diode to suppress the nasty back
EMF from the relay coil.

Have fun!!

Nick