Terminology

[bee_man]

I've got to grips with how to use various resistors to detect combinations of Tamper, Alarm, Fault and Mask using only 2 wires to the PIR or Mag, and it also looks like this DEOL scheme will distinguish a short between the 2 feed wires or one of them being cut. Now I read the book we talked about in another post, and it calls this scheme "Triple Resistor FSL 2 Wire". Which is the correct term please, or have I misunderstood it?. Also, why call it Triple Resistor, when there would be 4 resistors if it was a detector with Tamper, Alarm, Fault and Mask ?

 

bee

 

[PeterJames]

Not sure you need to be quite so keen for a DIY project, unless you have a valid reason for anti mask (And I suspect you dont otherwise you would not be diying) I really wouldnt be going down that route

[Oxo]

Well its Double for DEOL, Triple and Quad for the lot.

As above unless you are doing the Tower of London forget anti mask. And Fault for that matter.

 

Yes you are correct in the fact EOL allows for the detection of shorts and cuts, a far better method than DP.

[bee_man]

Hmm, that's puzzled me. Can you give me the reasons behind that thinking please. You both seem to suggest that I forget all about some features that can only make life safer. OK, Mask may be  a little over the top, but is does no harm. Fault, I am SO glad to see after wireless sensors that die without a squeak. I'm happy to accept the advice of those who know better, but I think it's fair to ask why, yes?

 

bee

[Oxo]

For a small domestic it is overkill.

Also if you are unused to wiring with resistors that many will cause a headache for you unless very very careful.

 

That is all really.

 

By all means use all the features if you so wish.

[sjsturner]

Its just unnesisary bee man, over engineering the job if you like.

By all means go the whole hog if you wish, but for a d.i.y premisis the potential intruder is unlikley to be able to overcome deol let alone masking.

These would be used in a higher value/ risk system where the intruder could be very skilled with good tools

[MrHappy]

Bee, how many resistors there values & what they mean is very dependant on the controls used

[PeterJames]

Its all about risk, unless you really think you will be targeted by someone who will come in mask all your detectors without you noticing then you really should not be diying. It is difficult to say without someone doing a risk assesment but the very fact that your insurer isnt insisting on an approved installer  would suggest that you dont even need to worry about eol just standard double pole would do. Personally I would go for a standard grade 2x with fairly comprehensive detection and a dialler, maybe gsm dialler. If you think you need more than that then its time to call a pro becuase no matter how much you read up and advice we give here you will not acheive what you have set out to do 

[fozzies]

Personaly, in a diy case, it comes down to the complexity of installation bee. Those 3/4 resistor setup detectors look great on paper, but trully need a pro to install them.practice makes perfect huh? think for a second on how anti-masking actually works on a reed contact, and you will probably choose to ignore them. Their positioning is critical....good luck whatever you choose, however if you trully need antimasking, you need a pro, despite their lack of electronic undrrstanding

[cybergibbons]

Normal disclaimer, not an installer, but have a lot of alarms and an MEng in EE as well.

 

Each thing you add that increases the complexity is going to reduce the time between failures. Masking isn't really an issue unless you let untrusted people into your house. I really don't see the advantage in fault detection - a walk test covers signalling, power and detection issues, but is not going to be full time.

 

I wouldn't expect the terminology to be consistent between panels, and it's probably not worth trying to work out what it is...