HarryBazzer Posted June 6, 2013 Share Posted June 6, 2013 Hi everyone out there in Alarm land. I am an Electronics engineer by trade and have been asked to install a Pyronix Euro Mini kit for a member of my family, which seemed pretty straight forward enough until I came across various Alarm/Tamper options. I have looked at the various circuits and decided on the 4k7 Alarm and 2k2 tamper option as it looks the easiest putting the alarm and tamper circuits in series I understand the double pole and EOL 4k7 and 2k2 tamper circuits on the PIRs, but this made me scratch my head when I thought about putting 3 PIRs onto 1 zone. If 2 PIRs on the same zone were triggered then surely the resistance would then be 9k4 and if all 3 PIRs on the same zone triggered, this would equate to 14.1K. Would this odd resistance confuse the system or is there not much chance of triggering 2 or more PIRs in sequence? Basically I want to be able to unset zone 1 at night time so as to be able to make it to the toilet without setting the alarm off, whilst the other zones are all still active. Is putting 2 or more PIRs on the same zone bad practice nowadays, if so, is there a way of programming the Euro Mini control panel to see 3 separate PIR zones as 1 zone? I am also putting 2 pet PIRs into a couple of zones. Looking at the pickup angles of the pet PIRs, it says to mount them at 1.5m height as they have a large horizontal angle, but not much vertical angle. Is it best to mount the pet PIR high up and angle it down, or again is this bad practice, as mounting them at 1.5m up won't look too nice and isn't very practical !! Any advice on this would be very much appreciated. Link to comment Share on other sites More sharing options...
sixwheeledbeast Posted June 6, 2013 Share Posted June 6, 2013 1 zone == 1 device, with very little exceptions. The system should be programmed to control different zones via part arms for bedtime/toilet etc Do not angle PIR's down this stops the specially designed IR pattern doing it's job correctly. Link to comment Share on other sites More sharing options...
matthew.brough Posted June 6, 2013 Share Posted June 6, 2013 Putting 2 pirs on 1 zone has always been bad practice. ^^^ advice above spot on. Just use part sets to control the detectors you want off at night. www.securitywarehouse.co.uk/catalog/ Link to comment Share on other sites More sharing options...
HarryBazzer Posted June 6, 2013 Author Share Posted June 6, 2013 After trawling the internet for schematics and finding various diagrams for multi PIRs on 1 zone, I'd like to thank you for answering my question so quick. 1 PIR per zone is the way to go and has saved me a lot of problem diagnosing afterwards. for that. Link to comment Share on other sites More sharing options...
matthew.brough Posted June 6, 2013 Share Posted June 6, 2013 The main reasoning behind it is so if there is a detector causing problems, you know which is false alarming. A luxury you don't get when more than one per zone making diagnostics practically impossible. The rules do allow certain devices to be more than 1 per zone such as door contacts but even though its allowed I think most shy away from it. Not that it's applicable to your set up but for police response, multiple devices on the same zone would never get the police out to an alarm so the idea has died of death over time. www.securitywarehouse.co.uk/catalog/ Link to comment Share on other sites More sharing options...
MrHappy Posted June 6, 2013 Share Posted June 6, 2013 multipal powered devices on single zone on new install is a silly idea, pir's work best at the height stated, what product have you got that states 1.5m ? After trawling the internet for schematics and finding various diagrams for multi PIRs on 1 zone, remember its product dependant, the old euro was modded from one eol device to 3 IIRC I'd read the book or bench test before you wire. Mr Veritas God Link to comment Share on other sites More sharing options...
securitysubbies Posted June 10, 2013 Share Posted June 10, 2013 On the Euro mini you can wire Double pole with no resistors... I did one last week and kept the PIRs on Seperate zones but put two doors on 1 zone. Works fine. Link to comment Share on other sites More sharing options...
Oxo Posted June 10, 2013 Share Posted June 10, 2013 On the Euro mini you can wire Double pole with no resistors... Care to explain that one? Link to comment Share on other sites More sharing options...
matthew.brough Posted June 10, 2013 Share Posted June 10, 2013 Care to explain that one? I didn't think it did DP either www.securitywarehouse.co.uk/catalog/ Link to comment Share on other sites More sharing options...
Oxo Posted June 10, 2013 Share Posted June 10, 2013 I meant DP with no resistors. It does do DP in the sense of a global tamper IIRC Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.