sensors in first floor

[rfdesq]

Oh, Martin already had an answer to my question. So combine them in the location where the expander is.

That is probably the best way to do the wiring. That way if you change your mind in the future you have access to each window switch wire. Remember that you have lost the ability of putting the EOL resistor right at the window where it belongs.

 

[v1rtu0s1ty]

Oh, Martin already had an answer to my question. So combine them in the location where the expander is.

That is probably the best way to do the wiring. That way if you change your mind in the future you have access to each window switch wire. Remember that you have lost the ability of putting the EOL resistor right at the window where it belongs.

Since am still new to home security, what disadvantage if not having EOL right at the window? And also, I don't have the ELK system yet.

I can only do wiring this weekend. By the time I got the ELK system, drywall will be up already. That means, I won't be able to put the EOL at each window contacts.

 

[upstatemike]

It's possible that there are ISP's out there that are blocking access to dynamic domain address. My webserver is in my basement and I'm getting a dynamic ip address from my ISP. Then I'm using the dyndns service for free.

Attached is the picture:

I can see that one OK.

 

[AutomatedOutlet]

I can only do wiring this weekend. By the time I got the ELK system, drywall will be up already. That means, I won't be able to put the EOL at each window contacts.

That shouldn't matter. You can always pull up the contacts out of the window and add resistors anytime.

 

[v1rtu0s1ty]

I can only do wiring this weekend. By the time I got the ELK system, drywall will be up already. That means, I won't be able to put the EOL at each window contacts.

That shouldn't matter. You can always pull up the contacts out of the window and add resistors anytime.

Cool! Honestly, I don't know the benefits of EOL. What do we gain by using it?
And would that mean that I will have an EOL for each sensor all through out the house assuming it's an endpoint?

Thanks!

 

[pete]

Cool! Honestly, I don't know the benefits of EOL. What do we gain by using it?

EOLRs allow the system to know the difference between an open sensor (you get the resistor value instead of open with an ohm meter) and a cut wire . . .

 

[BraveSirRobbin]

http://www.cocoontech.com/index.php?showtopic=739

Especially the last post in that thread.

I don't use EOL's but I can see where they have their advantages, especially if you ever think your wiring may become faulty in the future.

 

[Steve]

Man, I really don't know why EVERYONE doesn't use the GRI contacts with embedded EOLs. That way you don't need to worry about EOLs at all, just put the sensor in and you got it. And it only adds a very small amount to the cost of the sensor. Well worth it IMHO - they should be the standard!

 

[v1rtu0s1ty]

Man, I really don't know why EVERYONE doesn't use the GRI contacts with embedded EOLs. That way you don't need to worry about EOLs at all, just put the sensor in and you got it. And it only adds a very small amount to the cost of the sensor. Well worth it IMHO - they should be the standard!

so, do we need every sensors to have EOLs?

 

[Digger]

EOL stands for End of Line thus only the last device in the curcuit should have them.

 

[BraveSirRobbin]

Man, I really don't know why EVERYONE doesn't use the GRI contacts with embedded EOLs. That way you don't need to worry about EOLs at all, just put the sensor in and you got it. And it only adds a very small amount to the cost of the sensor. Well worth it IMHO - they should be the standard!

Unless you have to series a few of them together.

 

[v1rtu0s1ty]

Man, I really don't know why EVERYONE doesn't use the GRI contacts with embedded EOLs. That way you don't need to worry about EOLs at all, just put the sensor in and you got it. And it only adds a very small amount to the cost of the sensor. Well worth it IMHO - they should be the standard!

Unless you have to series a few of them together.

So that means, if I get sensors with built in EOLs, I shouldn't series them anymore. So going back to my star topology and zoning, since I will have 5 sensors for zone1(front of house) which will be in series, I only need one EOL. Am I right?

 

[Steve]

Man, I really don't know why EVERYONE doesn't use the GRI contacts with embedded EOLs. That way you don't need to worry about EOLs at all, just put the sensor in and you got it. And it only adds a very small amount to the cost of the sensor. Well worth it IMHO - they should be the standard!

Unless you have to series a few of them together.

True, but then I would still use an embedded EOL in the last sensor and regular sensors for the others.

 

[Spanky]

Your life would be so much simplier if you would wire the system with normally closed zone definition instead of EOL zone definition. Multiple switches connected to a zone input must be wired in SERIES, NOT PARALLEL as your drawing showed. If any switch opens then entire circuit opens.

The advantage of EOL over normally closed circuits is to be able to detect the wire being shorted. If you need that capability, use EOL.

A normally closed circuit keeps the circuit pulled to negative, which gives better noise and lightning immunity than EOL or normally open circuits.

 

[v1rtu0s1ty]

Your life would be so much simplier if you would wire the system with normally closed zone definition instead of EOL zone definition.  Multiple switches connected to a zone input must be wired in SERIES, NOT PARALLEL as your drawing showed.  If any switch opens then entire circuit opens.

The advantage of EOL over normally closed circuits is to be able to detect the wire being shorted.  If you need that capability, use EOL.

A normally closed circuit keeps the circuit pulled to negative, which gives better noise and lightning immunity than EOL or normally open circuits.

Can you guys please show me a picture of an EOL? Then I would make a new drawing in series to make sure I understand everything.

Thanks,

Neil

EDIT: In order for me to save more wire, some sensors like those in front of the house will no longer be terminated to the m1xin board, but rather, I will just drop the wires because, underneath it is the headend location. I will be saving 40 ft per run if I do this. So, my question is, am I correct that I can still terminate the contact sensors directly to the M1 in the headend location?