DEI 528t Triggers?

Hi, I have a dei 528T pulse timer and would like to know more about how to trigger it to connect a circuit with my LED footwell lights on to turn on when the alkarm is disarmed for 90secs. My alarm has a constant negative output when armed which goes to zero when disarmed. It also has an unused immobiliser circuit that can break a connection up to 10amps. Does the 528T have a facilty to be triggered by a constant source which goes to zero? Or can it be triggered by a source that goes from zero to a constant ground (using the immobiliser wires to disconnect >>> connect a wire going to a ground source) Also what happens after triggering does the circuit connect for the set timed duration and then disconnects regardless of a still present trigger input which is still constant? Thanks,

you can use the unlock wire from the alarm to pulse the 528T

Swamprat323 is right, use the unlock pulse from your alarm to trigger the 528t.  This relay works like a normal relay, meaning it only needs a momentary pulse to trigger, but will stay latched for the amount of time it is set up for.  You'll just have to adjust the set screw to increase the time.

Hi Guys, That's the problem my alarm does not have any onboard locking controls to pulse the 528T all it has is a constant negative out when armed. Also the unused immobiliser circuit interrupt. Any ideas???

What is the make/model of your system? There are not many that do not have door lock outputs.

Twelvoltz wrote: What is the make/model of your system? There are not many that do not have door lock outputs.

https://img51.imageshack.us/img51/7470/alarmdiagram1ao.gif Click the link then click on image to enlarge. Here's the instructions from the alarm, which may help clarify the system. Thanks, Mo

According to the diagram there is a BROWN / white that is remote control activated (presumably a channel 2 output). You could use this wire to activate the pulse timer anytime you want the lights to come on.

Hi, The BROWN / white is attached to the ultrasonic sensors (-ve power supply). The keyfob only has 2 buttons: Button 1: arm/disarm or arm press again quickly exclude interior ultrasonic sensors Button 2: purely as a panic button (not programmable) Thanks, Mo

just use the the parking output then. but this will make it coem on also when armed.

That would set off the alarm when armed, due to a negative being supplied to the dome light.