Bell Splitter Card

[Galeon]

Does anyone know of a conventional bell splitter card powered by 24 v supply , and here is the crux , must have eol monitoring of 2k2 .
I know there are some on the market but its 2k2 thats critical .
Don't really  want to go down the road of having one made , so if you know , please come back to me.

[Graeme]

could you not use any circuit extender where the eol of the control panel goes directly into the extender which then has it's own eol value for the added circuits?

[Galeon]

Hi Graeme ,
Long story not my job , helping someone got 6 bell circuits  lumped together and another circuit as true radial .
Sorted out the mess of 6 and checked the loads which makes us 3 proper monitored radials .
So as they say in Wales 'Thats Lovely' we have now got 4 proper monitored radials , now here's the crux , one circuit has a 2k2 and cant be found . We have rung this circuit had all the bells domes off and the building is silent , still reading 2k2 eol and we reckon the eol either in a joint box , had a look around see if anythings shutting down off the bell cct ie door mags or there's another bell with the dome off and we cant hear it by default . Reversed the circuit just in case we had a reverse polarity (the old panel didn't see reverse polarity. So you see the dilemma , just 1 radial out of 6 that is giving aggro.
No as fitted , whats new .

[Allen Higginson]

Is there any chance that two of your bell circuits are wired in four core?The reason I ask is I done a retrofit on a smaller system and couldn't find circuit 2 EOL.Found circuit 1 no bother (top of the house at the end of a corridor) but every other bell I took off had an in and an out.Had to wait until I could ring the bells continually to find the "hidden" bell on circuit 2 by ringing them,taking the gongs off until I still heard one ringing - great theory but no joy!
Sat,waited for inspiration then penny dropped - i hadn't installed the new panel and cables had been extended out from old flush mounted panel to a surface one so must have been wired in 4 core.Took the bell with the EOL on circuit 1 off the walll,removed the backplate and there it was in a connector block.
I love those sort of installs!

[Galeon]

I wish it was buzz , but alas no joy , its an old 1980s job singles in tube , and no doubt an eol sitting in a besa box ............ somwhere.

[Allen Higginson]

I wish it was buzz , but alas no joy , its an old 1980s job singles in tube , and no doubt an eol sitting in a besa box ............ somwhere.

You haven't got a silent alarm somewhere (ie - 24 volt lamp) at the EOL??Had these fitted too on sounder circuits with a local buzzer and 24 vdc les/mbc lamp with a red lens cover.
Does it signal to an ARC?I had one site up to 4 years ago (i have since left adt) that used the sounder circuit to hit a relay in the digi - caught me out the first time as it was a conventional and the relay contacts were clean.

[Galeon]

Good thought Buzz , but no , even checked out 2 no gas panels , house bells in the area , but had a mooch at the panels just in case there was an evac in signal.

[Allen Higginson]

Good thought Buzz , but no , even checked out 2 no gas panels , house bells in the area , but had a mooch at the panels just in case there was an evac in signal.

Looks like (as you suspect) there's probably a terminal box somewhere's with a lid on it and an EOL in  
Hate those sort of jobs,whats wrong with a wee note telling you where the EOL's are installed,eh?

[Allen Higginson]

http://www.kentec.co.uk/manuals/man-1072.pdf - you could use this 6 way unit from Kentec.
It has 10K EOL's but you put your mystery circuit with the 2.2K in parallel with one of the others but fit an 18K EOL instead of the 10K in it.This gives you a parallel resistence of around 10K on this combined circuit but if you get an open on either you will get the sounder card seeing 2.2K or 18K,both of which will bring up a fault.
Then on the off chance that you come across the missing 2.2K you can fit the 10K's and seperate them.

C-TEC do one as well as a 4 way with 6K8 EOL but you would have to use a 12K in this case as the other EOL.

[Galeon]

Buzz ,
Yep it seems the only way out of this at the moment , hhmm you're played this game before , thanks for mulling it over with us.