The Z21
is a FLEISCHMANN and ROCO innovation.
29
English
3. Installing the Z21 switch DECODER
Install the Z21 switch DECODER at an easily accessible location with adequate ventilation to facilitate carry-off of waste heat. The Z21
switch DECODER should never be placed close to strong sources of heat such as radiators or places subject to direct sunlight. This Z21
switch DECODER has been developed exclusively for dry, interior spaces. For this reason, do not operate the Z21 switch DECODER in
areas subject to major temperature and air humidity uctuations.
TIP: Use screws with a round head for installation of the Z21 switch DECODER, e.g. 3 x 30 mm.
4. Connecting the Z21 switch DECODER
The power supply to the Z21 switch DECODER is provided via terminals “PWR +” and “PWR -”. You can either connect the DCC digital
voltage from the track or alternatively a switching power supply with DC voltage output. This decoder may under no circumstances be
supplied with AC voltage such as that for example from a conventional transformer.
The power supply via a separate power supply unit is recommended above all for larger systems because the energy for switching the
motors does not need to be taken from the control centre or booster. In addition, the outputs remain active even if the rail voltage fails
(e.g. during an emergency stop), which can be highly practical for lighting and signals.
Then connect inputs “DCC N” and “DCC P” to the corresponding track signal outputs of the control centre or booster. Please note the
correct polarity of N and P above all if you also want to use RailCom
®
in your Z21 system.
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