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user manual LokSound / LokSoundXL V3, 1st edition, 07/2004
Connecting the LokSoundXL decoder
Please note, that RFI suppression may be achieved
by different means. We recommend to leave the
chokes supplied with the engine in the circuit.
3.2.1 General hints
When modifying an engine for digital operation please
take note of the following:
Take care that no motor terminal is connected to the
wheel pick-ups or pantographs, otherwise the decoder
may be destroyed.
Separate all connections including possible electrical
contact via the engine chassis.
The LokSoundXL has a certain size and requires
adequate space. Take care, that the decoder fits easily
into the engine, that no pressure is applied when
replacing the housing onto the chassis and that no
wires are squeezed between other parts. Further, make
certain that moving parts such as transmissions and
trucks are not obstructed by wires.
Fix the decoder with double sided adhesive tape, some
hot glue or screws, but never pack it into foam pads,
etc. The decoder heats up during operation and good
heat dissipation is essential.
After installation please check all connections with an
Ohmmeter and search for possible short circuits,
particularly between the motor terminals and the wheel
pick-ups.
All double pole (mechanical) contacts that are isolated
(not connected to the chassis) are suitable.
Before the wheel sensor will work various CVs have to
be programmed. See chapter 5.2.4 on page 21.
3.2. Connecting the LokSoundXL decoder
The LokSoundXL decoder is partly supplied as an open
circuit board. Do not remove the shrink sleeve, as
there will be no warranty. Like any electronic device
handling the LokSoundXL requires some care:
Please make absolutely certain that the module
does not have contact with any metal parts: risk
of short circuits!
The LokSoundXL has a few more terminals required
for the sound effects. LokSoundXL is supplied with
screw terminals for easy wiring without soldering. Please
note the following:
• LokSoundXL decoders have two screw terminal strips
(No. 1 + No. 2):
• Please make sure, that you always use the correct
terminal!
• Make certain, that the cable size is large enough
for the terminals (min 0.20mm
2)
• Tinn the ends of the wires or use cable glands
• Take care to avoid short circuits while inserting the
wires into the terminals.
• Use a suitable screw driver. Hold down the screw
terminals while tightening the screws to avoid any
mechanical force on the circuit board.
• Provide adequate RFI suppression of the motor: a
100 nF capacitor parallel to the motor terminals is
the absolute minimum.
Figure 6
: Connecting a wheel sensor
reed contact
drive wheel
miniature
magnet
