ET 200SP BU20 BaseUnits

ET 200SP BU20 BaseUnits is the Siemens ET 200SP base-unit branch that usually makes sense when the installation still belongs in the ET 200SP platform but the wiring concept points to screw-terminal base units rather than push-in handling. Compared with BU15, BU20 is the more natural family when the project, the maintenance routine, or the installed-base expectation still favors screw terminations. Compared with BU30, it is usually the cleaner choice when the cabinet does not need the denser or more feature-heavy base-unit branch and the priority is a stable ET 200SP cabinet wiring baseline. Keep this family in scope when the ET 200SP decision is already made and the next question is which screw-terminal base-unit layout matches the module, potential-group, and wiring plan. Read the product list as a base-unit fit map first, then narrow by exact terminal arrangement, shield handling, and the required module pairing.