DEI 515r Siren with backup battery

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=26026
Printed Date: August 29, 2025 at 8:30 AM

Topic: DEI 515r Siren with backup battery

Posted By: hongkongrr
Subject: DEI 515r Siren with backup battery
Date Posted: February 07, 2004 at 8:52 PM

Hi,

I searched the whole forum but couldn't really find the ans to my question. I was planning on buying DEI 515R which has 4 outputs (pos/neg power and pos/neg trigger). I was going to install the siren to my car w/o using either of the trigger wires because I just care for it to go off when the power gets pulled. Does the siren work like this?

Thanks! posted_image

Replies:

Posted By: Teamrf
Date Posted: February 08, 2004 at 2:48 AM

The DEI backup battery I had was an actual siren and it went off with the alarm as well.

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~The Rookie~
Rookie of the year that is...
Don't let the smoke out of your equiptment..it doesn't go back in.

Posted By: hongkongrr
Date Posted: February 09, 2004 at 12:34 PM

That is not really my question. I don't want to hook up the triggers to my alarm. I just want it to go off when the bettery is connected. Does that work?

Posted By: hongkongrr
Date Posted: February 09, 2004 at 12:35 PM

hongkongrr wrote:

I just want it to go off when the bettery is <b>connected</b>.

I mean disconnected

Posted By: daniel2002p
Date Posted: February 09, 2004 at 12:54 PM

the way those work is they go off when the alarm brian looses power. the instant trigger on the alarm becomes ground when the power is cut, and the the backup sees ground is goes off.

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2005 Toyota Corolla S
1.8L VVT-i I-4
Always double check your wires with a DMM!!!
Do Not Use A Test Light!!!
MECP Certified Installer!
Best Buy 665 - IN IT TO WIN IT! TEAM MOBLE!

Posted By: hongkongrr
Date Posted: February 09, 2004 at 3:14 PM

Is there any way to hook it up without an alarm brain?

Posted By: daniel2002p
Date Posted: February 09, 2004 at 5:15 PM

it gets very comlicated, unless you are very comfortable with car security i suggest you do not attempt. you have to set up two relays that when one looses 12v (when they take off the pos side of batt) that it show continuity to ground to the back up battery, and the same with neg side of the battery.

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2005 Toyota Corolla S
1.8L VVT-i I-4
Always double check your wires with a DMM!!!
Do Not Use A Test Light!!!
MECP Certified Installer!
Best Buy 665 - IN IT TO WIN IT! TEAM MOBLE!