Guest dan182uk Posted February 27, 2005 Posted February 27, 2005 Hi all This is my first post and probably the most stupid but the title really says it all. I have started an apprentiship and have done a lot of fitting of resistors in a variety of panels Scantronic, Galaxy, Texecom etc but have never got how the EOL resistors work and what the panel should see when the zone is closed/open. Any info or diagrams would be greatly appreicated as this sounds really embarrasing as I should know this stuff.
whistle Posted February 27, 2005 Posted February 27, 2005 start with galaxy 2x 1k resistors one across the zone and zone end of line open = 2k ( panel see`s the resistor across zone and the eol ) closed = 1k ( panel see`s the eol ) tamper S/C 0k short on cable hi res / lo res panel see`s under say 900 ohm or over 1500 ohm scantronic 2k2 4k7 as above now telecom just have an end of line
Guest dan182uk Posted February 27, 2005 Posted February 27, 2005 gotcha its all so simple now Dont understand how I did not know that before Thanks Dan P.S Is it the same for the 4k7 and 2k2 that in tamper it sees 0k?
norman Posted February 28, 2005 Posted February 28, 2005 Yes, just looking for different values. Nothing is foolproof to a sufficiently talented fool.
Guest Posted February 28, 2005 Posted February 28, 2005 Yes, just looking for different values. 41994[/snapback] err.. why do i have a feeling that 0ohm is zone fault and indefinite is tamper?? (DSC, Guardall, Gardtec, HHL, Esmi)
Guest ALSEC Posted March 1, 2005 Posted March 1, 2005 Hi allThis is my first post and probably the most stupid but the title really says it all. I have started an apprentiship and have done a lot of fitting of resistors in a variety of panels Scantronic, Galaxy, Texecom etc but have never got how the EOL resistors work and what the panel should see when the zone is closed/open. Any info or diagrams would be greatly appreicated as this sounds really embarrasing as I should know this stuff. 41987[/snapback] Dan Not being funny mate but why don't you ask your line manager (or at least one of the other lads)?? If you're doing an apprenticeship then it's your companies responsibility to ensure that you understand how the systems you are installing work. If there are reasons why you can't ask internally then i'm glad you managed to find out through this site anyway.
Guest oldtimer Posted March 5, 2005 Posted March 5, 2005 Dan Not being funny mate but why don't you ask your line manager (or at least one of the other lads)?? Maybee he has tried and they are playing the old knowledge is power trick on him ? If you're doing an apprenticeship then it's your companies responsibility to ensure that you understand how the systems you are installing work. I agree or maybee his company does not want him to get to clever and leave Anyway I will give you something to chew over Many moons ago when I worked for Thorn(spit) I worked on a 2 wire eol resistor and diodes sytem (9000_ So any ideas how this system worked and was fully copliant with 4737. Treat this as the Saturday teasr
norman Posted March 5, 2005 Posted March 5, 2005 why don't you ask your line manager....Maybee he has tried and they are playing the old knowledge is power trick on him ? 42558[/snapback] They might not know. Nothing is foolproof to a sufficiently talented fool.
mikeald Posted March 6, 2005 Posted March 6, 2005 hi dan, there is a fantastic book available which will help you with your apprenticeship. Its called "intruder alarms" surprise surprise! author is gerard honey, and the isbn no is: 0-7506-5760-x . This is an excellent book with nice diagrams. Get it off www.amazon.co.uk Intruder & Fire Member
Guest ALSEC Posted March 6, 2005 Posted March 6, 2005 Dan Don't be embarrassed mate - well done for having the guts to stand up and say "I don't quite understand why I'm doing this". If you immediate boss either doesn't know how to do end of line or does but doesn't want to share the knowledge then you should seriously think about whether you want to stay with that company any longer. Anyway, I hope you now understand how end of line works. Ronnie
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