Re: Dual Tech motion detectors with dual relay outputs ?

[Marc_F_Hult <MFHult@xxxxxxxxxxxxxxxxxxxxx>]

Thanks Robert,

The Visonic K-980D would seemingly work too -- assuming that the specifics
of how to access the LED and its mode of powering are amenable to the hack.
I'd use the first blink of the green LED to trigger a monostable timer to
actuate a relay for a few seconds. That relay would provide the output of
the "occupancy" detector.  The factory relay would provide the "intrusion"
detector.

If I were to use two physically separate motion detectors (PIR and Dual
Tech), am I correct in assuming that -- all else equal -- a Quad PIR would
provide fewer falses than a Dual PIR with almost as quick a response? If
the detector has to scratch its head for much more than a second or so,
it's not an improvement over what I've already tried and rejected.

I've been working on this lighting path project ("Lighting Vectors") off
and on for 7-8 years. Time to get it done ...

With the renewed emphasis on daylight harvesting and energy conservation
one would think that a dual output model (occupancy and intrusion) would be
commercially available. Of course that would mean acknowledging limitations
of dual tech sensors ;-) What am I missing here ?

... Marc


On Sun, 19 Aug 2007 21:29:12 GMT, "Robert L Bass" <RobertLBass@xxxxxxxxxxx>
wrote in message  <IC2yi.1012$4K6.905@trnddc02>:

>Hi Marc,
>
>If you don't mind tapping the LED circuit that's probably going to be your
best bet other than separate detectors.  Rokonet is not
>the only brand with separate LEDs for PIR, µWave and alarm.
>
>Visonic's K-980D has an LED indicator that you might find more useful. The
green LED flashes to indicate PIR trip and comes on
>steady for µWave trip.  The red LED and the relay activate for alarm (PIR
+ µWave).  Here's a URL:
>http://www.bassburglaralarms.com/product_4119_detailed.htm


>
>"Marc_F_Hult" <MFHult@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:cl6hc39pp23d9jph7pnup5tvpkh1qsqp5k@xxxxxxxxxx
>>
>> I'm looking for PIR + microwave (dual tech) motion detectors that
>> separate have outputs for both the PIR and microwave detectors. It would
>> be OK for the microwave not to be energized until after the PIR detects
>> motion (in other words, the two outputs could be PIR and (PIR+uWave)
>> rather than PIR and uWave).
>>
>> My application is for using the same device for both lighting path
>> automation (which needs to be fast but which for false detections are
>> not a major problem) and intrusion security (for which immunity from
>> false detection is important).
>>
>> The closest I've found are some Rokonet iWISE detectors
>>
>> http://www.riscogroup.com/Products.aspx?subcatid=152&id=12
>>
>> that have "Green Line for disabling the MW when the building is
>> occupied" and  separate LEDs for walk-testing that might allow me to
>> solder on comparators to close relays when the LEDs light. I'd prefer
>> something pre-built though.  Two separate NO or NC relays would be
>> ideal.
>>
>> Any suggestions ?
>>
>> TIA ... Marc
>> Marc_F_Hult
>> www.ECOntrol.org