Connecting A Buffer Capacitor/Buffer Circuit - tams elektronik FD-R Basic.3 Manual

FD-R Basic.3

6.6. Connecting a buffer capacitor/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 vehicle, 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 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 capacitor must have a capacity of at least 100 µF and a maximum
of 470 F and a proof voltage of at least 25 V. Pay attention to the
correct polarity when connecting!
Connection of a buffer circuit
The capacity of buffer circuits is considerably larger than that of buffer
capacitors (e.g. UPS-mini with 0.47 F, 1.0 F or 1.5 F). Use a buffer
circuit according to RCN 530 that can be connected without a control
line, e.g. UPS-mini, part no. 70-0221x, 70-0222x, 70-0223x.
When connecting, follow the instructions for the buffer circuit.
Fig. 5: Connection of a backup
capacitor ("buffer electrolytic
capacitor")
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