The S series of servo motors out of Germany, were a product from MTS-Germany prior to Parker acquiring that line. It was still offered for years out of one of our Parker divisions in Europe.
This line has been discontinued for years now and is no longer offered out of Europe any longer. Repairs are also no longer supported.
Direct replacements are not offered so some system re-engineering will be required. One of our local distributors can help assess your requirements and offer upgrade solutions (often this will include the old servo drive line as its likely its one that has also been discontinued).
Available product specs posted here for reference only: MTS-Germany Motors.pdf