alterEGO Posted November 21, 2007 Posted November 21, 2007 In which case would there not normally be some connection to a Latching supply terminal inside the panel to make the latching work correctly?(Edit - I seem to be shadowing Angus here. Or am I STALKING him ) lol, whistle is correct, this place gets better every day. i must admit i do get a good laugh from the 'Andy Diagnosis' sometimes. no offence. it was common at one point to latch devices, the installer my have had an issue if not connected correctly with the latch forcing an open zone with no means of resetting it, so in turn disconnected the latch. Best course of action as stated by angus is start again. i'd go with the gardtec cpx/595 depending on the size of the property, which also offers you wireless sensors should getting cables in be a problem.
alterEGO Posted November 21, 2007 Posted November 21, 2007 I'am assuming the normal unskilled "expert" buffing their way along? lol, no he admits he is no expert hence the name. just makes me laugh thats all or did you mean me?
amateurandy Posted November 21, 2007 Posted November 21, 2007 lol, no he admits he is no expert hence the name. just makes me laugh thats all Glad I keep you amused, I do my best TBH I think a lot of what you might assume is "diagnosis" is actually just a question trying to clarify what the OP means or what "best practice" is. I try not to be definitive as I know (as you've pointed out) my limitations. Unlike some (not you)
dennibobs Posted November 21, 2007 Author Posted November 21, 2007 Glad I keep you amused, I do my best TBH I think a lot of what you might assume is "diagnosis" is actually just a question trying to clarify what the OP means or what "best practice" is. I try not to be definitive as I know (as you've pointed out) my limitations. Unlike some (not you) Hi all, herewith 2 attachments. The smoke detector/pir has the 8 connection points. The pir has 7 - this is the start of the orange daisy chain Is it common practice to wire the detection zones to +12Volts at one end of the chain, the panel connection at the other? That's how this one was wired. Ive changed it to use a +5volt supply from the panel zone connection. I think it was done to reduce the number of wires going back to the panel from the main inter-connect box (which is in the garage).
alterEGO Posted November 21, 2007 Posted November 21, 2007 Hi all, herewith 2 attachments. The smoke detector/pir has the 8 connection points. The pir has 7 - this is the start of the orange daisy chain Is it common practice to wire the detection zones to +12Volts at one end of the chain, the panel connection at the other? That's how this one was wired. Ive changed it to use a +5volt supply from the panel zone connection. I think it was done to reduce the number of wires going back to the panel from the main inter-connect box (which is in the garage). It is done to free up cores in th cable, so they can get more then two zones off an 8 core. total cowboy job mate, just start again, everything they have done is wrong.
amateurandy Posted November 21, 2007 Posted November 21, 2007 Is it common practice to wire the detection zones to +12Volts at one end of the chain, the panel connection at the other? That's how this one was wired. At the risk of being shot down in flames - NO. Electrically this is not good as the voltage drops along the chain. Normally every powered device would have its own cable from the power source. With respect. It's been said before - it's all wrong!
Guest anguscanplay Posted November 21, 2007 Posted November 21, 2007 Arf - you ever seen a scanner like that ? - whats it look like with the cover on ?
Guest anguscanplay Posted November 21, 2007 Posted November 21, 2007 At the risk of being shot down in flames - NO. Electrically this is not good as the voltage drops along the chain. Normally every powered device would have its own cable from the power source. With respect. It's been said before - it's all wrong! DUCK - LOL what the O/P is describing is different to what your explaining, but in your case your also wrong - volt drops the same for a given length (irespective of the number of active devices at this level) some firms use multicore for more than one curcuit some don`t, you`ll see both on any job I`ve ever done
amateurandy Posted November 21, 2007 Posted November 21, 2007 DUCK - LOLwhat the O/P is describing is different to what your explaining, but in your case your also wrong - volt drops the same for a given length (irespective of the number of active devices at this level) some firms use multicore for more than one curcuit some don`t, you`ll see both on any job I`ve ever done Not necessarily, it all depends on the current drawn by the devices and the impedance of the various components of the circuit. If you "double up" (or better) the power circuit (supply AND return of course) you can reduce the effects to acceptable limits, but the end-of-line will always be worst. It's the old "serial vs parallel" situation.
Guest anguscanplay Posted November 21, 2007 Posted November 21, 2007 Not necessarily, it all depends on the current drawn by the devices and the impedance of the various components of the circuit. If you "double up" (or better) the power circuit (supply AND return of course) you can reduce the effects to acceptable limits, but the end-of-line will always be worst.It's the old "serial vs parallel" situation. you missed the bit about " at this level ..." or are you looking for another Arfur Mo Christmas lecture LOL
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