Generation 2 devices have been comprehensively redesigned to allow for wire-free 2-way switching. This method will replace the wired connection that would run between the S terminals of a Lightwave Generation 1 dimmer and Lightwave 2-way Dimmer as described above.
There is, therefore, now no need for a separate class of 2-way dimmers; you can simply wire any Lightwave Generation 2 dimmers into a 2-way circuit and all they require is live in and switched live out. Communication is carried out wirelessly and set up using the Lightwave App. This method also any number of dimmers can be used for multi-way switching.
Bear in mind that prior to grouping, the dimmers will only work when the others are set to off. In order to configure the group, ensure both dimmers in the same circuit are switched to off.
Please refer to the L21 Dimmer instructions attached for information regarding how to wire any Generation 2 dimmer (the same applies for 20-way or multiway).
In order to set up two or more Generation 2 dimmers as 2-way or multi-way switches, please refer to the automations page of the Lightwave Link Plus App and select the 'group' option. By creating a new group containing the relevant dimmers, a new 2-way circuit can be established (please see this article for more details).
There are 2 PDFs attached to this article with a diagram for 2 way switching. For all installations, the secondary side of the dimmer does not require a L (live) cable, as the live in the primary side powers the whole module. The S (signal) terminal is non-functional on the second generation dimmers for multiway switching, as the pairing of these is done using the Lightwave Link Plus app.
If you are not competent with this system then please consult a qualified electrician.