We have been on this many times and let us say that it is a matter of some
 disagreement. Some think it is a logical extension to the A100 and others
 not. But Doepfer has marketed it as such before through their retailers and
 webpage. Now they seem to have polised some of it away but I remember having
 read this like "the shaltwerk is the ideal sequencing solution for your
 analog synthesizers". So since they have been sold as extensions to some
 users in my eyes makes them such since they are made by the same company and
 share looks and features with the rest of the range.
 To get a bit off topic here, if it wasn't made for the A100, why bother to
 add cv and gate in the same voltage ranges as the rest. Why not use Yamaha
 v/hz or din sync I think it speaks for itself, BMW doesn't make spoiler
 wings and stuff for Renault, right Neither does Doepfer make controllers
 for others synths, it is for their own.
 > You´re quite right Florian. As far as I can tell the name of the
 > group is Doepfer system A100 modular synthesizer group NOT Schaltwerk
 > and the Schaltwerk is NOT part of the A100 system ........ is it
 > Keld
 >
 >