NOTE:
It is recommended always to use VS output of the digital decoder as a
common wire for the light functions instead of using one of the track
connections for this purpose in order to eliminate constant pulsating blinking
of the light functions.
IMPORTANT:
Always connect LEDs to the outputs of the digital decoder with
appropriate resistors in series! The value of the resistors is normally 1-10 k
Ω,
depending on the type of LED and track voltage. It is allowed to connect only
suitable lightbulbs to the outputs of the digital decoder directly.
Some factory-installed LED lights in the locomotives already fitted with
resistors; no additional resistors needed in this case.
6.
Using AUX3 and AUX4 outputs: these outputs are non-amplified and cannot
switch high-current loads. They provide maximal output voltage of +5 V,
regardless of the track voltage. Please note that the common wire for AUX3
and AUX4 is GND (-), not VS (+).
Each of AUX3 and AUX4 outputs provides maximum current of 20 mA. It is
enough to connect, for example, 1 to 5 small low-power LEDs with resistors in
series. AUX3 and AUX4 outputs are non-dimmable. For smooth adjustment of
the output voltage, trimming resistor should be used.
Here is a sample of connecting small low-power white LEDs to non-amplified
outputs AUX3 and AUX4 with separate brightness adjustment:
For switching consumers that require higher current (> 20 mA) and/or higher
voltage (> 5 V), switching amplifiers should be used - such as MOSFETs,
bipolar transistors etc.
AUX3
AUX4
GND
ZM05A
R1 10K
Ω
R2 1K
Ω
R3 10K
Ω
R4 1K
Ω