SOLVED
Why is the setup of the ctrlX-IO devices - including the power slice - possible, but using the config leads inside the ctrlX-PLC-Eng to Red triangle - indicating communication issue with a different IO-module?
Reasonable are outdated device-description files - contained in the current releases.
Solution: a) coming ctrlX-Works Patches will provide updated description data.
b) download of zip description packages are published soon.
step1 - Update device repository database of ctrlX-IOEng
step2 - proceed with the "Update device.." dialog
Workaround: do not include the Power-Slice in IO-config.