Modicon M221 Book - Logic Controller. The Modicon M221 book logic controller is for application for controlling of simple machines and offers best-in-class performance. It requires minimal installation and offers tremendous versatility. Connect a simple remote operator panel for instant maintenance and machine visualization. M221 Book Logic Controller SD card slot and USB port 2 analog inputs and a broad choice of I/Os Run/stop switch and cartridge extension Ethernet and serial line ports Programming with SoMachineBasic software Simple navigation delivers a more efficient engineering process All programming, visualization, and commissioning are handled in just one intuitive tool Additional modules for this controller are: - Safety module - Tesys SoLink motor starter - Extensive line of analog and digital modules - Lexium servo drives