Connecting Inductive Loads; Connecting Accessories Via A Relay - tams elektronik FD-R Extended Series Manual

English FD-R Extended
Fig. 2: Connection of LEDs (examples)
AUX1: parallel connection
AUX3: serial connection
AUX5: combination of parallel and serial connection

6.5. Connecting inductive loads

When connecting inductive loads (e.g. TELEX couplings, relays or other
accessories with coils), you should switch a free-wheeling diode (e.g.
1N400x) in parallel, in order to avoid damage at the output. Check to
connect the anode of the diode to the function output.

6.6. Connecting accessories via a relay

When you want to switch an accessory / accessories via the decoder,
which connection would lead to exceeding the maximum current at the
output or of the decoder, you can switch the accessories via a relay
(e.g. 1xUm 1A 12V, item no. 84-61010) and connect them directly to
the vehicle´s current collector.
The current consumed by the relay depends on its type. The relay
named in the example needs approx. 100 mA.
As described in the section "Connecting inductive loads" you should
switch a free-wheeling diode (e.g. 1N400x) in parallel to the relay.
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