Is it possible to connect AS-Interface with GND (shield)?
Never. The AS-i network is a symmetric network. This network must be electrically isolated from other components. The network requires an own power supply. This power supply must be a special symmetric supply, fulfilling the requirements of the AS-i specification. This power supply has a shield contact. An asymmetry to GND with more than 2% and an asymmetry of the connected network of more than 10% is not permitted.