Placing Resistors

[Arf-Gef]

Hey Guys,

 

I have a few newb questions.

Firstly,do I only need to put resistors at each sensor (EOL setup)?  I’ve read the manual, but it doesn’t specify this… (I’m about to use a Satel Versa 10 panel.)

Or is there other places in an alarm system where resistors should be put?

 

Am I right thinking I need 1 resistor, in series, at the furthest part from the panel (for example in the housing of each sensor)?

Which wire should have the resistance? (The Alarm one, in this case it’s called „NC&C”(?) NC&C both signyfy that no R is needed don't they? ) If it’s a combined sensor (PIR & glass breaking) then do both NC&C inputs need a resistance added at the end of the wire?

What if the sensor has an input called „EOL”? Does that mean that the resistance is included and no need to add one to that input or that i need to put the wire with resistance into that input.

 

Secondly, what resistance should I use? I heard of using 3.3k Ohm, DSC panels use 5.6 kOhm AFAIK others 2k2... Is that specified with each brand/panel? Is smaller resitance better?

 

It’s mostly to learn and for DIY fun, so that’s why such a newb doesn’t get professional help.( Introduction )

 

Thank you very much for your help, I am getting quite confused, as you may have noticed

Edited April 25, 2015 by Arf-Gef

[james.wilson]

Depends on your panel. Different brands have different eol values.

Id use the relays as separate corcuits, ie the pir treat as one device the glassbreak as another

[PeterJames]

Hi Arf

 

There is a clue in the name, End of Line, the resistors should go at the end of every circuit. The panel is looking for a resistance coming back on the circuit, one resistance for open circuit and a different resistance for closed circuit. Its to stop potential sabotage of the system whilst its in day mode, i.e system disarmed someone comes along and cuts the wire or shorts the wire, thinking that the system will still arm but wont go off when they break in when the system is armed. Of course as soon as they tamper with the wire the system will activate armed or not.

[MrHappy]

Hi Arf

Sudder....

Hi Arf-Gef

[Arf-Gef]

I found out what resistors value is recommended. In case someone needs it in the future: it's supposed to be between 500 Ohm and 15 K Ohm.

[james.wilson]

That's a huge range

[Arf-Gef]

I know, I was supreised...
Does the wide range has any significance? (I mean does that mean sth apart from being flexible when it comes to EOL resitances )
I was wondering whether it's better to put in a big or a small resistance.

[al-yeti]

First decide on panels or panel your going to use , some allow different values on each zone some are fixed values for the particular panel

Then you will see what value is best

On an electronics point of view, I assume lower values example 500ohms may make things difficult to detect, faults tampers etc hence why higher values are used or no resistor with seperate tamper loop

Experts may correct me here

[james.wilson]

I found out what resistors value is recommended. In case someone needs it in the future: it's supposed to be between 500 Ohm and 15 K Ohm.

depends on the panel but its prescribed. highest value i knew of castle with 13k. id assume you have misread?

[Vince8282]

Just for fun When you find what values are expected by the control panel and usually the correct resistors are supplied with the panels to be put in the detectors, check that the detectors that you are using have or have not already got the resistors built into them. If they have check that the appropriate value is selected by fitting the link/s to the correct values and of course if they have got the resistors built in you will nor require the ones that came with the panel.