I've never seen this set in person, although it appears occasionally in 12V Lego train system images. I've never seen it used, or described.

How did the LEGO 7862 Remote Controlled Decoupling and Signal 12V work? What is the 'Signal' component of the decoupler?

Box image

1 Answer 1


It basically forces the coupling magnets to separate via the pins pointing downwards from the magnet holders:

enter image description here

Here's a demo.

  • That's a cool video!
    – CJBS
    May 21, 2015 at 15:49

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