SIRIUS MCU motor starter Enclosure degree of protection IP54 plastic Communication AS-Interface electromechanically switching Short-circuit protection with circuit breaker DOL starter Brake without Performance class 8 A Motor circuit breaker with bi-metal thermal without manual operation Connection power M screw connection Special variant new design A/B slave AS-i SPEC V2.1 Sensor-actuator 1x AS-i 3xDI/DO Supply sensor U-AUX