User manual

tams elektronik
!
English LED-Control
Connecting LEDs
You can connect one LED or several LEDs in series directly (without
series resistor) to one LED Control
Basic
. The maximum number of LEDs
you can connect to one PCB depends on the voltage supplied and the
fluorescent colour of the LEDs.
Notice: It is not possible to connect external LEDs to a driver´s cab
lighting.
Caution: The legs of a LED should not be mounted crosswise to
avoid short circuits!
Maximum number of LEDs per PCB connected in series
Forward
voltage of
the LEDs
*1
Nominal /
operating voltage
of the transformer
(=)
*2
Max.
number
of
LEDs
*3
Nominal /
operating voltage
of the transformer
(~)
*2
Max.
number
of
LEDs
*3
2 V 12 V / 12 V 5 12 V / approx. 17 V 7
4 V 12 V / 12 V 2 12 V / approx. 17 V 3
2 V 16 V / 16 V 7 16 V / approx. 22 V 10
4 V 16 V / 16 V 3 16 V / approx. 22 V 5
2 V 18 V / 18 V 8 18 V / approx. 25 V 11
4 V 18 V / 18 V 4 18 V / approx. 25 V 5
*1
The forward voltage of white and blue LEDs is approx. 4 V, differing coloured LEDs approx.
2 V.
*2
Nominal voltage and operating voltage: The operating voltage with a.c. transformers is
approx. 1,4 times the nominal voltage given on the transformer. With d.c. power packs the
operating voltage corresponds to the given nominal voltage.
*3
Tolerance and / or voltage fluctuations in practice often cause the calculated operating
voltage not being available. For that reason it is recommended to connect one LED less than
possible in theory.
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