Moving a door contact

[Daz66]

I have a Gen 4 Accenta/Optima alarm fitted to my garage which has given a couple of 'false' alarms recently, or so I thought.

When investigating this morning after last nights 2:30am alarm reset, a lot of phaffing around with a bunch of keys and a torch in the freezing cold, I discovered that where the door contact is fitted to the garage door there is a lot of 'play' in the door and the alarm can be set off by pushing the door very hard. This leads me to think that someone is doing this to get me to remove the physical deterants or turn off the alarm, probably they will wait for me to open the door and set about me in my pj's.

Anyway I want to move the contact to a place where the door is less flexible, however the cable is not long enough to reach. Do I extend this with a chock block screwed to the wall or should I run a new cable all the way back to the board.

Many thanks for your help.

Daz

 

[Denford1]

If its easily accessible , replace the cable , if not , then use a proper junction box (security warehouse or Alert sell them).

 

[RF Lighting]

I have 2 contacts on the top of my garage door wired in parallell. It is a steel up and over type door, and has a fair bit of play at either side.

By having 2 contacts, it means if the door is pushed at either side the alarm will not go off as one of the contacts will still be made, but if the door is actually opened both contacts are broken, causing the alarm to go off.

 

[Meeja]

I have 2 contacts on the top of my garage door wired in parallell. It is a steel up and over type door, and has a fair bit of play at either side.

By having 2 contacts, it means if the door is pushed at either side the alarm will not go off as one of the contacts will still be made, but if the door is actually opened both contacts are broken, causing the alarm to go off.

Need to be a bit careful with that, as the MO for an up and over door can be folding it in from the corner - which with paralleled sensors would mean entry could be gained without triggering an alarm.

You'd have to have a pretty poor door to start with, and be mightily unlucky though.

 

[Daz66]

RF I like the idea of two sensors, when wired in parallel is that one wired to the other or both cables going back to the board, sorry for the ignorance but all the diagrams I have found only confuse the matter!!

 

[redpis]

http://www.securitywarehouse.co.uk/...D=1617&zenid=c2e80c7eb15d0d23294de09eef26cee9

A roller shutter contact on the base of the garage door is a good bet.

 

[JohnD]

That's what I've got on mine. It's a big, burly thing.

 

[RF Lighting]

I have 2 contacts on the top of my garage door wired in parallell. It is a steel up and over type door, and has a fair bit of play at either side.

By having 2 contacts, it means if the door is pushed at either side the alarm will not go off as one of the contacts will still be made, but if the door is actually opened both contacts are broken, causing the alarm to go off.

Need to be a bit careful with that, as the MO for an up and over door can be folding it in from the corner - which with paralleled sensors would mean entry could be gained without triggering an alarm.

You'd have to have a pretty poor door to start with, and be mightily unlucky though.

There is a dual tech passive inside the garage anyway, so assuming someone got as far as folding the corner of the door over, the alarm should still be activated.

RF I like the idea of two sensors, when wired in parallel is that one wired to the other or both cables going back to the board, sorry for the ignorance but all the diagrams I have found only confuse the matter!!

That is one wired to the other. You connect the first one up as normal, and then connect the second one to the same terminals on the first one. It means that even if one of the switches opens and the other remains closed, the alarm still sees a complete circuit.

You need to wire the tamper loop in series thoug, so it it is broken at either detector, the alarm will see it and go into tamper mode.

 

[Daz66]

Thanks RF i will get another contact and add it to the bottom of the door.

If I assume correctly I will 'join' the contact to the older one with the open and closed side and run a new cable back to the board for the tamper side.

As I have six core wire I have some spare capacity in the existing so should be able to connect left over wires for tamper??????

Sorry for the confusion but I am paraniod about being broken into again!!