DOEPFER A-100 - Page 41

doepfer
System A - 100 9. Appendix
33
9.3. Using the mini power supply/
bus
9.3.1. Introduction
The A-100 MNT (Mini power supply / bus) is compo-
sed 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 modulses (for instance A-190,
A-191) which need it.
The maximum current loading capacity totals 100
mA for +/- 12 V and/or 50 mA for the +5 V supply.
The sytem 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.
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.