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GBM-8.2
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ms elektronik
3.3. Connection of LEDs
To display the busy signals (e.g. in
analogue systems), connect the
cathodes (-) of LEDs (with series
resistors, e.g. 1 kΩ) to the outputs of
the GBM-8.2.
Always with series resistor!
Never operate LEDs without a series
resistor, the LEDs will be destroyed
very quickly in this case!
Separate transformer!
Do not use the driving transformer for
the power supply of the LEDs, but a
separate transformer, e.g. to supply
other lights! If you use the driving
transformer to supply the LEDs, the
equalising currents that occur can
damage connected components.
Supply with alternating voltage
If you connect the LEDs to an AC transformer, you should also connect a protective diode
(e.g. 1N400x, x=2...7) and a capacitor with a capacity between 10 and 100 µF and a dielectric
strength of at least 25 V. This will prevent the LEDs from flickering.
No incandescent lamps!
Never connect incandescent lamps to the outputs, as they usually consume more than 50
mA of current. The outputs of the GBM-8.2, which are designed for a maximum current of
50 mA, would be destroyed during commissioning!
10 | Connections GBM-8.2
