HOW to convert signal level for external-siren

- N
- nitro2
  
  Contact options for registered users
posted
14 years ago

Sat, Oct 10, 2009 7:58 AM

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 ????????

- A
- alarman
  
  Contact options for registered users
Vote on answer
posted
14 years ago

Sat, Oct 10, 2009 3:37 PM

Just use a relay.

- R
- RockyTSquirrel
  
  Contact options for registered users
Vote on answer
posted
14 years ago

Sat, Oct 10, 2009 9:08 PM

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.

- N
- nitro2
  
  Contact options for registered users
Vote on answer
posted
14 years ago

Mon, Oct 12, 2009 5:19 PM

which orientation ???

"RockyTSquirrel" schreef in bericht news:P6adnZFwTdchak3XnZ2dnUVZ snipped-for-privacy@giganews.com...

- F
- Frank Olson
  
  Contact options for registered users
Vote on answer
posted
14 years ago

Mon, Oct 12, 2009 9:50 PM

You have a "50 percent" chance of getting it right on the first go. ;-)

- R
- RockyTSquirrel
  
  Contact options for registered users
Vote on answer
posted
14 years ago

Mon, Oct 12, 2009 10:26 PM

like frank said you got a 50/50 chance of getting it right the first time.. just make sure the banded end of both diodes are in the same direction..

if the siren keeps sounding in the off condition, then reverse the diodes.

if that stops the sounding, then trip the alarm and make sure that they do sound in alarm..

- F
- Frank Olson
  
  Contact options for registered users
Vote on answer
posted
14 years ago

Tue, Oct 13, 2009 3:34 AM

Just make sure they're in "series" with either the positive or negative lead from the siren. Don't try "shunting" across the siren outputs (+) and (-) directly.