blacksmith Posted February 16, 2014 Author Posted February 16, 2014 Well chaps, I bit the bullet and bought a s\h Euro 44+ panel, which so far has worked out OK, just programming it up at the moment. I know this will have you all rolling your eyes, but hey, £20 and an afternoon of swapping the wiring is not to be sneezed at.
blacksmith Posted February 16, 2014 Author Posted February 16, 2014 aand I'm back! OK, Looks like the original system was working mostly via blind luck. From what I can tell, there are no terminating capacitors fitted anywhere (or I haven't found any yet), and the system is detecting only 4 of the 9 id zones. For added fun, looks like several of the runs aren't in shielded cable either. :| I've tried swapping a biscuit from one PIR to another, and the zone number changed OK, so the fault appears to be in the wiring rather than the biscuits. There's also a rather strange arrangement where some of the ID wiring follows the 12v power in the same cable, then a second cable at the panel which had ID+ and ID- only, doesn't carry power, but was carrying signalling to a seperate dialler. Anything to lose by adding a capacitor to each PIR? All the PIRs appear to have a single cable run to them, so I guess that would be considered the end of a run. I did also wonder about boosting the ID line voltage a touch. it's 6.51 on midpoint at the panel with everything in-place, but I'll see what the voltages are like at the PIRs. (btw, you are now all allowed to point and mock the DIYer. )
james.wilson Posted February 16, 2014 Posted February 16, 2014 Caps are not normally fitted mind securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
blacksmith Posted February 16, 2014 Author Posted February 16, 2014 I was looking at the suggestions here http://www.castle-caretech.com/wh/manuals/misc-id-plus.pdf and in the panel manual, which suggested a 0.01 uf capacitor at the end of each cable run. As each detector has a single run to it, seems reasonable. I'll test each biscuit too, in case there is one or more faulty ones causing a problem - all this started with a mains power problem after all.
blacksmith Posted February 17, 2014 Author Posted February 17, 2014 One question, what *type* of capacitor is used for ID termination? I can find hte value in everyone's docs, but nothing about the type. Is the small ceramic "bead" type suitable?
datadiffusion Posted February 17, 2014 Posted February 17, 2014 At low values it will be irrelevant AFAIK. It was a bead one comes with brand new texe ID adaptor kit AFAIK. So, I've decided to take my work back underground.... to stop it falling into the wrong hands
blacksmith Posted February 17, 2014 Author Posted February 17, 2014 OK, one trip to maplin later, these http://www.maplin.co.uk/p/resin-dipped-ceramic-001uf-capacitor-ra44x these http://www.maplin.co.uk/p/mylar-film-001uf-capacitor-ww18u and these http://www.maplin.co.uk/p/decoupling-ceramic-disc-001uf-capacitor-bx00a which will be tried first, thanks to the "decoupling" description. We'll see if any of those make a difference.
datadiffusion Posted February 17, 2014 Posted February 17, 2014 I think its highly unlikely to be caps (type, or lack of) on a short run domestic. I would suggest testing all the cables with every device disconnected for shorts or high resistance So, I've decided to take my work back underground.... to stop it falling into the wrong hands
petrolhead Posted February 17, 2014 Posted February 17, 2014 If each detector is cabled back to a central point now would ne a good time to ditch the id and go deol
datadiffusion Posted February 17, 2014 Posted February 17, 2014 And if there is only a 4 core to the central point, just swap the junction box for a node / LIM / RIO whatever So, I've decided to take my work back underground.... to stop it falling into the wrong hands
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