11
Connection to the digital system
5.2. Power supply by the digital system
For smaller layouts with only a few electric loads turned on at the
same time, the SwitchPilot 3 Plus can be supplied directly from the
command station or booster. The terminals Pw A and Pw B are
connected parallel to the terminals Trk A and Trk B.
If accessories (e.g.: Märklin® K track) do not switch at all or only
respond with little power, check the track voltage and increa-
se it, if necessary. The SwitchPilot 3 Plus can display the supply
voltage as described in chapter 6.8.1. If the voltage cannot be
increased, please use an external power supply.
This wiring scheme must be used if you want to configure the
SwitchPilot 3 Plus on the programming track of your command
station. For more information, see Chapter 9.
5.3. External power supply
For larger layouts with many electric loads, we recommend the
use of an external power supply. DC and AC power supplies are
suitable with the specifications described in chapter 4.2. We re-
commend the use of a stabilized
DC power supply
with at least
18V DC
at least
3A
output power (e.g.: ESU part number 50119).
For switching Märklin® K track drives a minimum of 18V is re-
quired. Keep this in mind when choosing the transformer! The
SwitchPilot 3 Plus can display the supply voltage as described
in chapter 6.8.1.
This type of wiring cannot be used for programming on the pro-
gramming track. In this case, a temporary connection must be
established as shown in chapter 5.2.
B 0
Main track exit
approx.
18V
B 0
Main track exit
approx.
18V
Stabilized DC
power supply
recommended
Figure 6: Supply from the digital system
Figure 7: Separate (external) power supply
Summary of Contents for SwitchPilot 3 Plus
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