hello group,
thank you adam-v and maxime for your answers,

here is what i found out:
no short on the busboard, evrything seem to work good (illuminated lights) without any
module plugged.
as long as i have about/under 600mA everything works fine, no modules are faulty.
when i go over 600mA the fuse blows.
to me it seems that the power supply can only take the half...
as long as i connect one busboard everything works fine with all modules doing as they
should...
when i connect the second busboard the fuse blows.
everything is connected the right way...
when i plugg a single module it seems to be allright(as far as you can say with only one
module...)
i don´t even get close to 1200mA.
what should i do
raise the fuse to about 600mA
can i destroy sth by raising it too high
in older messages it was told that it can be about 500mA, but it blows.
any other experience with the diy-kit in this group
i really don´t know what this could be...
i built new cables, but they cannot be faulty and i replaced the module-screws with hex-
keys, but that should not cause those problems(my old diy-case worked well with it)

thank you and please excuse my poor english

cheers

maise

--- In Doepfer_a100@yahoogroups.com , "Adam-V" <adam-v@...> wrote:
>
> Hi maise
>
> We're probably going to need a little more information so a couple of
> questions for you:
>
> Does the fuse blow with or without modules connected to the bus boards
>
> It if blows with no modules connected.
> You probably have a short in your bus board wiring so double check
> that you have the buses wired correctly between the boards. +12V
> connected to +12V, -12V connected to -12V etc.
>
> If it is OK with no modules connected (it only blows with modules
> connected):
> There are several things that could be the cause.
> 1. You may have a module plugged in incorrectly which is causing a
> short to the supply. Double check that all your modules are correctly
> plugged in. It is very easy to plug the power connectors into the bus
> boards the wrong way around or slightly out of alignment.
> 2. You may have too many modules connected for the supply. Recalculate
> the supply requirements for the modules you have and check that they
> don't exceed the rating of the power supply.
> 3. You may have a faulty module which is causing the issue. Try
> starting with only one module connected and add one at a time until
> you find the one that is causing the issue. (I'm sure you already know
> this but make you switch the power off when you add or remove the modules)
>
> Please let us know how you go.
>
> Cheers,
> Adam-V
>
> --- In Doepfer_a100@yahoogroups.com , "maise3000" <beta@> wrote:
> >
> > hello group,
> >
> > i have a problem according to the fuses of my modular.
> > i built a larger case and ordered the diy-kit 1.
> > my problem is: every time i connect more than one busboard to the
> power-supply the fuse
> > blows. i tried fuses with 500mA, the same happened.
> > can it be that i am working with too thin cables
> > is there another groupmember having these problems with the diy-kit
> > my old power board and supply was working fine, but i need the
> smaller board and like the
> > fact of having no dangerous voltages...
> >
> > thanks and cheers
> > maise
> >
>