sensors in first floor

v1rtu0s1ty

Senior Member
My pre-drywall meeting is on friday, that means, I can start drilling holes in the evening of Friday. :D

Ok, I was reviewing the house this afternoon and found out that my drawing was missing a lot of window contacts. I have windows wherein it needs 2 or 3 window contact sensors. Anyways, that means, I have 23 sensors in first floor. But in my drawing, I have 1 XIN expander in first floor and if I remember correctly, 1 XIN expander can only accomodate 16 sensors. Would that mean that I need to add another XIN in first floor? Also, since I will have only XIN board in the first floor, what can do you recommend?

Thanks.
 

pete

Active Member
you may be able to reduce zones . . . you can wire a few sensors in series and call it one zone . . . ie: I have four banks of 4 windows each on the front of my house and each bank is one zone . . . so 16 windows is only four zones . . .

Pete C
 

Paul

Active Member
pete said:
you may be able to reduce zones . . . you can wire a few sensors in series and call it one zone . . . ie: I have four banks of 4 windows each on the front of my house and each bank is one zone . . . so 16 windows is only four zones . . .

Pete C
That's what I'd do. On any window or set of windows with more than 1 sensor, wire them as the same zone.
 

v1rtu0s1ty

Senior Member
pete said:
you may be able to reduce zones . . . you can wire a few sensors in series and call it one zone . . . ie: I have four banks of 4 windows each on the front of my house and each bank is one zone . . . so 16 windows is only four zones . . .

Pete C
So are you saying, for example, that all my window contacts in front of house(assuming I have 5 window contacts) be terminated to just one zone on the M1XIN board? So physically, they are going to be wired together with a terminal block?
 

v1rtu0s1ty

Senior Member
so is this what you guys mean?

windowcontacts_in_z1.gif
 

rfdesq

Senior Member
Hi Neil:

You want to series the wiring not parallel the wiring. If any window is open, then the zone is open. You may want to amortize the cost of the input expander over the life of the house to determine if you are not shortchanging yourself by not adding it now.
 

v1rtu0s1ty

Senior Member
rfdesq said:
Hi Neil:

You want to series the wiring not parallel the wiring. If any window is open, then the zone is open. You may want to amortize the cost of the input expander over the life of the house to determine if you are not shortchanging yourself by not adding it now.
I didn't get what you mean when you said "amortize .......". Also, maybe we were writing at the same time. I have added a drawing on my earlier post. Is it correct that all window contacts sensors in front house goes to the same hole in the expander?
 

pete

Active Member
your getting the idea, but your illustration looks like parallel wiring (only one sensor needs to be 'secure' to make the alarm panel read OK)

you need series wiring, like daisy chaining, from the panel one wire runs to a sensor, then the out of that sensor to the next sensor (ans so on), then from the last sensor back to the panel. . . if your using any, EOL resistor goes at the last sensor in the string . . .

. . . as far as which windows to group together as a zone, it's your choice, but I would stick to 'ganged' (mounted side by side) windows being one zone, or maybe all windows in one room . . . this way when the alarm indicates a zone 'unsecure' you don't need to hunt to find which window is open . . .

Pete C
 

AutomatedOutlet

Senior Member
Whether you decide to put it all on one board or spring for the second board, I would at least recommend that you homerun all of the wires back to the board and then combine them there if that's what you want to do.
 

pete

Active Member
upstatemike said:
I still don't understand why I can never see your pictures? All I get is the red X!
what browser are you using ? ? ? sounds like an security settings issue . . .

ie:I use thunderbird for email and all images are blocked by default . . . an additional infobar (just below the top menus) pops up when this happens and allows me to turn on images per message . . .

can you see other peoples images ? ? ?

Pete C
 

upstatemike

Senior Member
pete said:
upstatemike said:
I still don't understand why I can never see your pictures? All I get is the red X!
what browser are you using ? ? ? sounds like an security settings issue . . .

ie:I use thunderbird for email and all images are blocked by default . . . an additional infobar (just below the top menus) pops up when this happens and allows me to turn on images per message . . .

can you see other peoples images ? ? ?

Pete C
I'm using IE and see other people's imagaes without a problem.
 

v1rtu0s1ty

Senior Member
pete said:
upstatemike said:
I still don't understand why I can never see your pictures? All I get is the red X!
what browser are you using ? ? ? sounds like an security settings issue . . .

ie:I use thunderbird for email and all images are blocked by default . . . an additional infobar (just below the top menus) pops up when this happens and allows me to turn on images per message . . .

can you see other peoples images ? ? ?

Pete C
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: :D
 

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  • windowcontacts_in_z1.jpg
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v1rtu0s1ty

Senior Member
pete said:
your getting the idea, but your illustration looks like parallel wiring (only one sensor needs to be 'secure' to make the alarm panel read OK)

you need series wiring, like daisy chaining, from the panel one wire runs to a sensor, then the out of that sensor to the next sensor (ans so on), then from the last sensor back to the panel. . . if your using any, EOL resistor goes at the last sensor in the string . . .

. . . as far as which windows to group together as a zone, it's your choice, but I would stick to 'ganged' (mounted side by side) windows being one zone, or maybe all windows in one room . . . this way when the alarm indicates a zone 'unsecure' you don't need to hunt to find which window is open . . .

Pete C
Ok, since my wiring is a star star topology, if I do it in series, that would affect the design of my wiring. Can I do the series near the expander?
 

v1rtu0s1ty

Senior Member
AutomatedOutlet said:
Whether you decide to put it all on one board or spring for the second board, I would at least recommend that you homerun all of the wires back to the board and then combine them there if that's what you want to do.
Oh, Martin already had an answer to my question. So combine them in the location where the expander is. :D
 
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