HOW to convert signal level for external-siren

[nitro2]

How can i convert a "positive hold-off " to a "negative hold-off" level.

The siren who was attached to my alarm has been taken of the system when i
moved , now i want to reinstall this siren BUT obviusly the ( un- )
installer has removed some components from this connection inside the
cabinet.

The only thing i can say is that now as soon as i connect the siren to the
cabinet ( outdoor siren connection ) it starts to work straight away , and
only goes silent when the alarm is ACTIVE .

the only info i got from the old installer is that i need to " use 2 diodes
to get it right " , so i am positive he knows what he removed since the
alarm was working without any problems in my previous home .

the alarm is an aritech cd150 .


who can help ????????

 

[alarman]

How can i convert a "positive hold-off " to a "negative hold-off"
level.
The siren who was attached to my alarm has been taken of the system
when i moved , now i want to reinstall this siren BUT obviusly the (
un- ) installer has removed some components from this connection
inside the cabinet.

The only thing i can say is that now as soon as i connect the siren
to the cabinet ( outdoor siren connection ) it starts to work
straight away , and only goes silent when the alarm is ACTIVE .

the only info i got from the old installer is that i need to " use 2
diodes to get it right " , so i am positive he knows what he removed
since the alarm was working without any problems in my previous home .

the alarm is an aritech cd150 .


who can help ????????

Just use a relay.

 

[nitro2]

which orientation ???

diodes in series with the legs of the siren ckt..
supervises the ckt to the panel, voltage reverses for alarm, ie full
power to the driver.