@Va1entine82 - More likely overload the controller and cause the thermal cutout to trip - but depends on how powerful the controller is. But this is a digital layout, and Nightfly1957 answered you completely, if a little grammatically stilted.
@Va1entine82: With the digital System of Märklin it is no problem.
The trains are synchronized by the Central station.
If You have no station, just take the loks and programm all parameters the same.
Now look which one runs slower. This one put behind the faster Lok. So You have 2 loks in front of a big train.
And what You ask is no problem. The loks have different adresses. So nothing can happen. Sorry for my bad english
Greetings from Gemany
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