Hey guys!

Is the emergency stop on Märklin Digital confined to a booster area? Meaning if a locomotive is causing an emergency stop in an area monitored by a booster (#60174), will the emergency stop be confined to that area or will it stop the entire layout (across booster borders)?

With CS2 and booster. The Emergency stop kills power to everything on rails, including those on Booster section...at least with Marklin boosters.

Yes, that was what I meant. My idea was to operate accessory decoders in a separate booster area, thus still being able to operate them in case something happens.

I believe the correct Control solution with boosters and to have best redundancy, is what I learned from the late Wolfgang Leitenberger ! of Eisenbahn Clinic and ETE fame

That is; that track power should be thru a booster/s, and switches and signals (and their decoders) only, should be connected to the Central Station. This allows redundancy in case of derailment particularly with a multibooster setup and protects your Central Station from spike inducing shorts, caused by the likes of derailments, that have already been know to "mess up" the brain of said CS, particularly CS2.

When he told me, I thought it was thoroughly logical, and will be how my layout is set up and powered. I believe Woolfgang passed away before the CS2 was released, but he meant any brand of Central Station. Woolfgang was a Marklinist but a great ESU fan and agent in San Francisco thru his "business" Eisenbahn Clinic. He took over as USA West area Marklin repair agent from Jacques, when he left for France nine years ago !

Anyhow, for me, I will have the main layout running areas as one booster area, The BTW and roundhouse etc. as another and the Hidden Station and helix as the third booster area. The function decoders for switches signals and layout features only, connected to the CS.
Hmmm should my Coaling Station be on the BTW section booster power then probably should !