Siemens Backplane bus module for ET 200PRO m/starter, 110mmProduct Overview Rear panel bus module 110 mm for ET 200pro motor starter isolator modules and ASM disconnecting module 400 V This high quality rear panel bus module is specifically designed for ET 200pro motor starter isolator modules and ASM disconnecting modules operating at 400 V. The 110 mm module provides essential backplane connectivity for distributed motor control systems, ensuring reliable power distribution and communication within the ET