Doepfer A-100MNT Miniature Power Supply - Manual

doepfer System A - 100 9. Appendix
31
9.3. Miniature power supply/bus
9.3.1. Introduction
The A-100 MNT (Miniature power supply / bus) is
composed of a miniature power supply and system
bus, with connectors for four modules. It’s designed
to be used with a small set-up of just a few modules, in
your own custom-designed case.
The idea is that then you can use individual A-100
modules - for instance the filters, the filterbank, fer-
quency shifter, sampler, MIDI interface, etc. - as
free-standing pieces of equipment, which can easily
be integrated with your other instruments or recor-
ding equipment.
The power supply provides the usual A-100 system
requirements of +12 V and -12 V, and an additional +5
V supply, for the few modules (e.g. A-190) which need
it.
The maximum current loading capacity totals 100
mA for +/- 12 V and/or 50 mA for the +5 V supply.
From spring 2007 the A-100MNT is equipped with
larger heat sinks and is able to deliver 200 mA for +/-
12 V. The max. current for +5V remains unchanged.
The system bus provides connections for four System
A-100 modules. As well as the power supply, it also
carries "INT.CV" and "INT.GATE" connections (see
A-100 manual, main introduction, chapter 3, ‘The
A-100 signal flow’.).
The A-100 MNT is supplied as standard with an exter-
nal power supply, which has to be connected to the
socket on the MNT’s circuit board.
A
The external power supply’s transformer sup-
plies alternating current (AC). If you want to
use another power supply instead of the one
supplied, it must have a voltage output of about
7 to 9 V AC
and a capacity of at least 300 mA.
From spring 2007 the transformer has to be
able to deliver at least 500mA.
If you connect an external power supply
which produces direct current (DC), the A-
100 MNT simply won’t work!
A
Both the A-100 MNT and any connected modu-
les must be firmly fixed into a proper casing.
Any sort of "flying construction" is absolutely dis-
couraged, because if two conductors from separate
modules accidentally make contact, (for instance if the
bus-bars from one module ended up touching another
module’s bus-bars), damage will almost certainly re-
sult.
In cases like that, the DOEPFER guarantee is definitely
void.