ZIMO MX695, Инструкция по эксплуатации

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Large-scale Decoder & Sound Decoder MX695, MX696, MX697, MX699 Page 11
3.6 Switch inputs
Additionally to the switch input “IN 3” (see chapter 3.2, speaker and cam sensor) there are 3
further inputs (“IN 1”, “IN 2” and “IN 4”). These can be used to connect reed contacts to trig-
ger sounds, etc. Electrically, those switch inputs behave very similar.
See chapter concerning decoder configuration (CVs), especially regarding sound.
3.7 External stay-alive capacitor
A stay-alive capacitor (a
bigger electrolytic capacitor,
a “Goldcap”, etc. or a bat-
tery)
- improves the driving behavior on
dirty tracks (or wheels),
- reduces flickering lights
caused by interrupted contact
(e.g. frogs),
- Prevents the train from getting
stuck when driving slowly, especially in combination with the ZIMO software fea-
ture “prevent stopping on tracks without current” *),
- compensates energy loss produced by RailCom and HLU cut-outs and the corre-
sponding motor sound, additionally improves the quality of the RailCom signal.
*) In case, the current supply is interrupted (due to dirty rails or frogs), the decoder auto-
matically provides enough energy to move the train forward, even if it was currently in a
braking procedure and was supposed to stop. The train is stopped as soon as the wheel-
track-contact is reestablished. After the train stopped, the decoder tests again for track
power (if there is none, the engine moves the train a little forward until power is restored).
Generally, the efficiency of energy storage modules increases with the capacity; starting with
1000 μF (μF = Micro Farad) you can see an effect, about 100,000 μF are recommended for
large-scale locos, as far as there is enough space in the loco. Goldcap modules with a capacity
of 1 F do have a bigger effect. Too big capacities have the disadvantage of very long charging
times; this is why ZIMO recommends not more than 0.5 F for Goldcap modules (related to full
voltage of about 15 V to 25 V from a series connection of 6-10 elements with 2.5 V each; a single
Goldcap therefore has a capacity of up to about 3 F.
Proper preparations in ZIMO large-scale locos (ca connection) ensure that external capaci-
tors do not cause problems when programming decoders or updating the software (referring to
ZIMO loco number recognition via RailCom).
The charging current for the stay-alive capacitor on the positive connection is about 100 mA, i.e.
fully charging a 10,000 μF capacitor takes about 5 seconds, a 0.5 F Goldcap takes about 3
minutes.
The ZIMO Goldcap mostly used is the GOLMRUND (and the GOLMLANG), which consists of
7 Goldcaps, 1F / 2.5 V each, ergo
140.000 μF / 17.5 V
in total. The ca connection on the
decoder ensures that the charging voltage does not get too high.
Using a battery instead of a capacitor can only be recommended for experts (engineering spe-
cialists); it is very important that the battery is completely discharged after taking the loco off
the supply of the tracks. Tip: a relay, supplied by the running voltage, with a capacitor hold cir-
cuit, which interrupts the connection to the battery after about 1 minute of lost supply.
Note to decoders MX699:
Contrary to other types, the MX699 also have an internal stay-alive capacitor, which consists
of 3 Supercaps in series, each with 3 F / 2.7 V, i.e. 1 F and 8 V in total. This capacitor ensures
securely passing parts without current, possibly with reduced speed. The sound supply is
guaranteed by transforming 8 V to 10 V, so the sound is fully preserved.
Nevertheless, it may be useful to connect an external stay-alive capacitor, like a GOLMRUND,
because it is charged to higher voltage (17.5 V instead of 8 V). This provides more voltage and
energy for motor and functions.
3.8 SUSI interface
The “SUSI” interface was developed by Fa. Dietz and
defines the connection of additional modules to the
decoder. Usually these are sound modules, which are
used in combination with non-sound decoders, i.e.
MX695KN and MX696N .
Additional to the sound modules, the market also pro-
vides digital couplers with a SUSI interface. Some lo-
cos have PCBs for pantographs with SUSI interface
integrated, wherefore they can use the interface on
the decoder.
Furthermore, the SUSI interface is used for loading a
sound project or update fast (with the decoder updat-
ing and testing device MXULF/A); however, this uses
faster communication instead of the SUSI protocol.

the Goldcap module GOLMRUND , often used as stay-alive capacitor
it consists of 7 Goldcaps, i.e. 7 x 1F, in total
140000 μF / 17.5 V.