System unit for operating underground hydraulically powered roof supports, has electronic control module connected to electronic communication module and interrupter unit at common structural unit

摘要

The system unit has an electronic control module (A) connected to an electronic communication module (B) and an interrupter unit (C) at a common structural unit (10b). The electronic control module is directly coupled to a power supply (8). The modules and the interrupter unit are coupled separately to the transmission paths of a data transmission device (7).