MS-SOUND-decoders MS440 to MS990 Page 11
Schematics
MS590N18
Top side (with Next18)
Bottom side
NO connection on bottom side,
therefore not shown here
NOTE: External energy storage with
MS590
Due to the extreme minituarization, the “Next decoder” MS5990
does NOT contain previsions to connect an external energy storage directly.
It is possible to connect ELCOs (practically without limitation) to “GEM. Pluspol”
(common positive) and ground, although, WITH additional components and
a dielectric strength suitable for the running voltage (usually 25 V):
The resistor prevents an inrush current too high, the diodes enable Service
mode programming, software updates and sound loading by dropping the volt-
age in spite of higher capacities.
ZIMO storage modules
with
Tantals
or
Goldcaps
(currently,
at the time of writing this edition of the instruction manual, in development)
can also be connected to “Gem. Pluspol (+)” (common positive) and ground; in
contrast to the variants described beforehand, a much bigger capacity is possi-
ble, but also space and costs are higher.
External capacitors on miniature decoders over
-
controller
STACO1
STACO1 10 x 7,3 x 2 mm STACO1 (centre) connected to miniature sound decoder
(CAD enlarged ) MS490N and 2 miniature gold caps in series (scale 1:1)
The StayAlive controller is connected to the terminals (solder pads or wires)
“common positive” and "GROUND" of the decoder (two-pole!).
The STACO1 comes with 3 mini-goldcaps as the actual energy storage,
which, connected in series, represent a capacity of 100,000µF. Of course,
all 3 should preferably be connected, but it also works with 2 (with about
50% runtime) if there is a lack of space. The STACO1 board contains a
step-up voltage converter that sucks the gold caps from their fully charged
state (8 V if 3 of them; 5.5 V if 2) to their almost fully discharged state (2 V)
and delivers a constant voltage of 10 V. This is enough to drive and to sup-
ply the sound amplifier (which runs on 5 V) without interruption and without
loss of volume.
The wire connections between the controller board and the mini gold caps
make their local separation possible, and thus in many cases the accommo-
dation of the StayAlive technology.