Base unit (BU30-MS1) for ET 200SP motor starters with 24V and 500V power supply including cover for power supply bus BaseUnit SIMATIC ET 200SP for accommodating the ET 200SP motor starter in the ET 200SP system including power supply and communication interface.The BaseUnit enables easy installation and reduces wiring to a single power supply. The robust design and the form-fitting connection technology enable use in harsh industrial environments.The BaseUnits are available with various power supplies for the motor starters.The ET 200SP decentralized I/O system replaces the tried and tested ET 200S system.ET 200SP motor starter - flexible. Powerful. Space-saving.