Door trigger sensor?

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spokman

Copper - Posts: 75

Joined: June 19, 2004

Location: United States

Posted: July 15, 2004 at 7:11 PM / IP Logged

How does it work? My alarm has either a + or - input. Not sure what it is sensing? Can anyone explain how it is working?

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profuse007

Gold - Posts: 2,015

Joined: October 20, 2002

Location: Texas, United States

Posted: July 15, 2004 at 8:00 PM / IP Logged

what kind of car do you own?

one car might have neg others might have pos.

taken ur car, say its negative trigger(no need for the pos wire), which senses if the doors are open or not during the state of arming.

when arming, if someone open ur door for whatever reason, ur alarm goes off.

Houston,TX

"The two most common elements in the universe are H+ and stupidity" (Ellison).

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spokman

Copper - Posts: 75

Joined: June 19, 2004

Location: United States

Posted: July 15, 2004 at 8:15 PM / IP Logged

I understand that but I don't understand what the alarm is sensing? Is a circuit being completed or is it just sensing polarity or?

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profuse007

Gold - Posts: 2,015

Joined: October 20, 2002

Location: Texas, United States

Posted: July 15, 2004 at 8:38 PM / IP Logged

who knows, i could be either depend on the makers.

Houston,TX

"The two most common elements in the universe are H+ and stupidity" (Ellison).

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Javelin3o4

Copper - Posts: 239

Joined: August 22, 2003

Location: United States

Posted: July 15, 2004 at 10:24 PM / IP Logged

The alarm will senses 12v, or ground.

So on a negative door trigger system, when the alarm is armed its looking for 12v comming from the door trigger, when it does and the alarm is armed if the door is opened the pin switch then looses 12v. and will show ground, setting off the alarm because the alarm is no longer getting 12v from the door trigger.

On a positive door trigger system, when the alarm is armed its looking for a ground signal comming from the door trigger, when it does and the alarm is armed if the door is opened the pin switch then will read 12v setting off the alarm because the alarm is no longer getting a ground signal from the door trigger.

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spokman

Copper - Posts: 75

Joined: June 19, 2004

Location: United States

Posted: July 15, 2004 at 10:34 PM / IP Logged

Thanks everyone! Javelin that really made it clear what is happening. Appreciate the help!

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Door trigger sensor?

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