Alarm door contacts Help!!!!

[telectrix]

haha. reminds me of a system i took over some years ago. ade optima. the guy who installed it had done a nice job, but with 1 exception. he'd wired all the global tamper loops in parallel.

 

[tazz]

haha. reminds me of a system i took over some years ago. ade optima. the guy who installed it had done a nice job, but with 1 exception. he'd wired all the global tamper loops in parallel.

Give a £1 Tel for every one i have seen like that....lol

 

[Tridentsystems]

I remember when the scantronic 9500 was the new kid on the block with its on board printer. Ultrasonic detectors, tube and batten frames , foil and pressure pads. Now they were alarms

 

[telectrix]

good old days. shop windows foiled in a huge rectangle, all the corners double folded to maintain continuity, masked and varnished over. lace wired doors, covered in hardboard. there's a major retailer in hanley, stoke-on-trent that i did in 1982 still got my window foil on windows and glass doors.

 

[tazz]

Remember designing the pcb for the Logic 4.......so glad we have software to route it now...!!

 

[telectrix]

Remember designing the pcb for the Logic 4.......so glad we have software to route it now...!!

wasn't that the key operated panel that preceded the optima? and then came A1 panels, omnichronic. what a load of crap those were.

 

[tazz]

Optima and A1 Omicron 6000, 7000 was new technology and processors locked up, later we used nvm and watchdog circuits to sort them out....so came optima xl and omicron 8000

 

[Tridentsystems]

Forgot about lacing. Remember I had a load condemned because I used me tacker ! Reckon Tazz etched each Logic 4 pcb by hand. Galaxy was still the best IMHO. When they first came out, so flexible and support was great

 

[tazz]

Think the big A company made Galaxy a success......tracks by hand not Quite....but they were all assembled in a liitle back street shop in Liverpool.......now its a very big factory owned by Honeywell just down the road...

 

[ruston]

Thanks guys, so let me clarify this. each contact is simply a zone at the panel (2 connections), then at the door contact I connect 1 core to each of the silver terminals that are connected by a resistor across them? Thus ignoring the other 3 brass terminals at the door contact?
So no tamper connections are required?

It's a reed switch , not a resistor .

 

[tazz]

It's a reed switch , not a resistor .

I think we all knew that ...just easier not to confuse the op and get straight to the problem

 

[Retrosparks]

One important factor in this thread is in my mind, the fact that a tamper loop on the door contact provides double pole protection to the device, if an attempt is made to short out the wiring to prevent the contact from working, a fault condition will be generated. A single pole pair to the device will just stop working if the wiring is shorted out.

As for old alarms, I can go back to the days of end of line batteries, relays, circuit wire, foil, tube and wire frames, infra red rays, and inertia's.....it is much easier nowadays with programmable control units !!! Feeling rather old now :whatchutalkingabout

 

[tazz]

good point, there is also another feature which most installers miss, which is pos and neg applied triggering, if you short the tamper to the zone loop it will activate, will also trigger when pos or neg is applied to zone. If you remember this is how you fitted pressure mats.

 

[Tridentsystems]

Ahh nice to see some proper old engineers. Feel young again ! Got 50 vipers to calibrate on a bank vault wall. Any helpers ??