Re: Krone blocks, alarm cable, cat5, etc etc

["leewild80" <muddyboots@xxxxxxxxx>]

Hi Pete

--- In ukha_d@xxxxxxx, "Pete Church" <yahoo@...> wrote:
>=20
> I too am in this situation and actually have a "Comfort connector
block" =
on
> my long list of things to research and buy.  Looking at the Krone
blocks
> they seem like quite the thing, although I would say that the 237D may
be
> overkill for Comfort.  Unless I've misinterpreted the notes it sounds
lik=
e
> the 237D has capability for 39 terminals with each terminal being able
to
> cope with 2 wires =96 so 78 wires!  Now I'm sure the power supply in
Comf=
ort
> will not be able to handle that many accessories, and Lee I didn't
realis=
e
> you had built Buckingham Palace!

Yes there are more terminals than I need, but it just seems like such a
com=
pact, neat solution for commoning wires together.

=20
> I'm thinking of the 237A which has "through capacity for 20
pairs" i.e. 2=
0
> wires each side each commoned through to their terminal opposite. 
Again
> these can handle 2 wires per terminal meaning four wires per through
pair=
.
> If you start thinking about commoning these up with a fly wire looping
> through adjacent terminals you could create your own 237D, but split
it i=
nto
> two (say +12V and 0V).  Each pair of terminals would be able to take 3
> incoming wires (you lose one for the flywire) so each half of the
block
> would be able to handle 3x10 incoming wires, which sounds a lot more
like=
a
> Comfort installation.  If you've got less wires you could even avoid
> doubling up wires in terminals.
>
> Other benefit is that a 237A is =A34 whereas a pair of 237D are =A329.
=
=20

Your suggestion would indeed take up less space, but I wonder if relying
on=
a single fly wire to common terminals together would add another potential=
failure point, plus the total current demand for all devices would end up =
running through one fine-gauge fly wire - perhaps nothing to worry about
gi=
ven the low currents we're talking.

I think I'd prefer the neatness and permanent commoning of the 237Ds, plus
=
they come in red and black - so one red for 12v distribution and one black
=
for 0v :)

Incidentally, when I was googling round yesterday, I saw 237Ds for around =
=A38 each (so I think a pair is still cheaper than the Comfort 12v/0v
expan=
sion PCB).

After starting all this discussion off I'll prbably not get round to
actual=
ly doing this....

It's interesting to see just how many Comfort users face the same problems
=
though !

Cheers
Lee
=20
>=20=20
>=20
> I'm about to order a couple.
>=20
>=20=20
>=20
> Pete
>=20
>=20=20
>=20
>   _____=20=20
>=20
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
> leewild80
> Sent: 05 October 2009 13:36
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] Re: Krone blocks, alarm cable, cat5, etc etc
>=20
>=20=20
>=20
>=20=20=20
>=20
> Hi Ian
>=20
> Have just been reading this page on the Canford site:
> http://www.canford.
> <http://www.canford.co.uk/Products/46-104-KRONE-237DB-Module>
> co.uk/Products/46-104-KRONE-237DB-Module
>=20
> It suggests they can be use with stranded cable, 7/0.15 or 7/0.2 are
the
> preferred sizes.
> I *think* 7/0.2 is typical for alarm cable, so it sounds promising in
> theory...
>=20
> Lee
>=20
> --- In ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com, "ianh10=
00"
> <ianh1000@> wrote:
> >
> > Hi Lee
> >=20
> > I have the same challenge with my setup. These look a neat
solution but=
I
> doubt they would be reliable with stranded cable, I guess you could
tin t=
he
> strands with a little solder.=20
> >=20
> > Regards
> > Ian=20
> >=20
> > --- In ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com, Paul
> Gale <groups2@> wrote:
> > >
> > > I would also be interested in this - I have a similar
arrangement of =
3A
> term blocks (lots!)
> > >=20
> > > Paul.
> > >=20
> > >=20
> > >=20
> > > > -----Original Message-----
> > > > From: ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com
> [mailto:ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com] On Beh=
alf
> > > > Of leewild80
> > > > Sent: 05 October 2009 12:39
> > > > To: ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com
> > > > Subject: [ukha_d] Krone blocks, alarm cable, cat5, etc
etc
> > > >
> > > > Hi all
> > > >
> > > > I have a Comfort system, with inputs from a number of
PIRs - all of
> > > > which share 12v and 0v connections.
> > > > Comfort itself only provides single 12v/0v connections,
so currentl=
y I
> > > > have a not-very-ideal setup where the various PIR wires
are twisted
> > > > together & shared across several ways in a 3-amp
connector block, a=
nd
> > > > in the other side of the connector block I have daisy
chained some
> > > > wires across to common them together.
> > > >
> > > > It works but it's really not ideal, not only because
it's messy as
> > > > hell, but screw connectors on stranded wires are not
very reliable.
> > > >
> > > > Have been wondering about a better solution for a
while, like
> connector
> > > > strips with leaf contacts and insulated combs for
commoning togethe=
r.
> > > >
> > > > But then I happened across another thread on here where
people ment=
ion
> > > > using Krone blocks.
> > > >
> > > > A bit of searching suggests a couple of Krone 237D
blocks might be =
an
> > > > ideal and neat solution - they have a flying lead that
I could conn=
ect
> > > > to Comfort's 12v and 0v, and all the terminals within
the block are
> > > > commoned together. They even come in red and black :)
> > > >
> > > > A few questions if I may:
> > > > 1) Does this seem a sensible idea ?
> > > > 2) I presume I can use the standard Krone-type
punchdown tool that =
I
> > > > bought for wiring cat5 faceplates ?
> > > > 3) Do the blocks work reliably with stranded 6-core
alarm cable ?
> > > > 4) Do the blocks work reliably with the solid cores of
cat5e cable =
?
> > > > 5) And (dumb question) - "normal" (237A)
Krone connectors - are
> > > > terminals on both sides of these linked across so they
act just lik=
e a
> > > > connector block ?
> > > >
> > > > Thanks for any help !
> > > >
> > > > Lee
> > > >
> > > >
> > > >
> > > > ------------------------------------
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > __________ Information from ESET NOD32 Antivirus,
version of virus
> > > > signature database 4480 (20091005) __________
> > > >
> > > > The message was checked by ESET NOD32 Antivirus.
> > > >
> > > > http://www.eset. <http://www.eset.com> com
> > > >
> > >=20
> > >=20
> > > __________ Information from ESET NOD32 Antivirus, version of
virus
> signature database 4480 (20091005) __________
> > >=20
> > > The message was checked by ESET NOD32 Antivirus.
> > >=20
> > > http://www.eset. <http://www.eset.com> com
> > >
> >
>=20
>=20
>=20
>=20
>=20
> [Non-text portions of this message have been removed]
>




------------------------------------