508D Double guard temporary disable

I'd like to disable my 508D with a 2 hour timer when I leave the dog in the car.

My concern is that I'd not always remember to turn it back on and therefore the 2 hour timer.

Any suggestions on what timer/relay to use and where to get it?

Is it best to use it to break the black [ (-) ground when armed ] wire?

Thanks, mine is being used as a single (Interior) alarm only and is tied in with the VW factory alarm. (No separate remote).

I know I can simply add a switch to enable or disable the alarm. I've done that.

I now want to add a timer that runs down in, say, 2 hours.

The idea is that I disable the 508 alarm when the dog is in the car, which is never more than one hour.

In the past I have forgotten, on occasion, to turn the 508 back on and then discovered a few days later that I was locking the car without activating the motion sensor.

By adding that timer, the 508 will automatically arm again when I lock the car the next time (as long as that is past the set timer duration).

Just wondering if someone knows of a small timer with a button that would suit this application.

Thanks for the suggestions.

It looks like the DEI 611 T only times in seconds and doesn't go out to 1-2 hours.

Haven't found the spec's for the TR7 yet (except that it has 4 cylinders and a stick shift).

Finally had a chance to look at the TR7 features and specs. It looks like it can not be timed beyond 4 minutes.

Pity.