KNX/EIB KNX alarm to siren connections

[MikeMelga]

Hi all.

I have a Gira KNX alarm system and I need help connecting it to a Elmdene Rapier 6000 external siren.

You can check both the Gira connections and the Elmdene connections on the photos.


This is how I connected them:


Elmdene - Gira

1 (H+) - 12v/ 0,1A (I have doubts on this)
2 (H-) - 12v/ 0,1A GND (I have doubts on this)
3 (RTN) - don't know where to connect
4 (-ST) - Blitz (-)
5 (-R) - ASIR (-)


When I connect like this everything works, but:

- Don't know where to connect the tamper return (RTN)
- The light strobe is very dimm (you almost can't tell it's strobing)


so,
Am I connecting the + and - to the wrong place?
Where shall I connect RTN?
The siren is rated 250ma and the strobe 150ma. The Gira external 12v makes reference to only 100ma power. Can it be a low power issue?
I still haven't cut the engineer link on the siren (makes siren act for 5 seconds max.). Does it have anything to do with it?


Any help would be appreciated.
Thanks!

[MikeMelga]

No one?

[chris39x]

Hi MikeMelga,

i think that these systems don't work together. Because the Gira-System give power seperately for siren and strobe at the Connectors 12V(+)/Blitz(-) and 12V(+)/ASIR(-). The connector 12V / 0,1A doesn't have enough Power (100mA) The other 12V+ connectors (Blitz,ASIR,ISIR) does have together 1,6A.
In relation to RTN try this:
GiraX2 Elmdene
Sabo -> RTN(8)
GND -> RTN/SEL(6)
It's to trigger an alarm if someone cut the cable or open the siren.

I hope i could help a little bit, maybe you can connect siren and strobe without using the elmdene-elektronic.
If your problem is already solved, please tell me how.

Greets and good luck ;-)
Christian