Functions: Configurable safety control, Configuration via MSI.designer software, USBmini interface, Removable program memory (must be ordered separately, part no. 50132996), Transfer of diagnostic data via external fieldbus modules, e.g. MSI-FB-PROFIBUS (optional), Additional I/O extensions available (optional); SIL: 3, IEC 61508; Performance Level (PL): Up to and including e, EN ISO 13849-1; Category: 4, EN ISO 13849; Number of outputs: 4 Piece(s); Number of inputs: 20 Piece(s); Connection: Screw terminal; Dimension: 45 mm x 96.5 mm x 121 mm; Certifications: TÜV Rheinland, c UL US