User manual

tams elektronik
!
FD-R Extended English
6. Connections
Note the following comment in order to protect the
decoder from (maybe irreparable) damage!
Avoid all conducting connections between the decoder and
accessories connected to the decoder´s common return conductor for
all function outputs on the one hand and metal parts of the vehicle or
the rails on the other hand. Connections result for example from badly
isolated connecting wires (as well at the stripped ends of connecting
wires not in use) or insufficient fixing and isolating the decoder or the
accessory, for example. Risk of short circuit! In this case the overload
protection of the decoder is not able to protect the decoder from
damage.
Before connecting the lighting and other accessories to the outputs
check if the output´s current is below the maximum permissible value
per output and the total current is below the safe load. Should the
permissible output current be exceeded, this normally results in
damage to the decoder. Exceeding the decoder´s total current will
lead to switching off the decoder by the overload protection.
You should under no circumstances connect the decoder´s return
conductor for all functions to vehicle ground. Risk of short circuit!
Old analogue driving transformers (e.g. models in a blue housing from
Maerklin**) are not suitable for use with digital decoders in analogue
operation! These transformers have been designed for the older
supply voltage of 220 V and, due to construction, generate very high
excess voltage impulses when changing the driving direction. When
using them with the modern supply voltage of 230 V too high excess
voltage impulses can occur, damaging electronic parts on the
decoder. For that reason only use driving transformers designed for a
net voltage of 230 V.
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