Manual

tams elektronik
tams elektronik LD-G-43
3.12. Connecting a backup capacitor or buffer circuit
In sections with bad contact to the rails (e.g. when running over turnouts) or with a (e.g.
construction-related) bad current consumption of the locomotive, the power supply of the
decoder can be interrupted briefly. In analogue mode the effects are usually small, but in
digital mode massive disturbances can be the result: e.g. flickering of the lights and stuttering
of the motor up to automatic switching to analogue mode. This can be remedied by
connecting a backup capacitor or a special buffer circuit.
Connection of a backup capacitor
The electrolytic capacitor must have a capacity of at least 100 µF and a maximum of 470 µF.
The minimum proof voltage is:
 for exclusive use in digital systems: > 25 V
 when used in analogue systems: > 35 V
Pay attention to the correct polarity when connecting!
Connection of a
backup capacitor
Connection of a buffer circuit
The capacity of buffer circuits is considerably larger than that of backup capacitors (e.g. UPS-
mini with 0.47 F, 1.0 F or 1.5 F). Use a buffer circuit according to RCN-530 which is connected
to ground, e.g. UPS-mini (item numbers 70-0221x, 70-0222x, 70-0223x).
Connect the control line to the "UPS" connector. This ensures that the decoder regulates the
charging current and current output and avoids problems e.g. when programming the decoder
on the programming track or when switching on the system.
Connection of a
buffer circuit according to
RCN-530 (e.g. UPS-mini)
Connections | 35