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
>