SINAMICS G120D Control Unit CU240D-2 PN-F FO (6SL3544-0FB21-1FC0) — a control unit manufactured by Siemens, designed for industrial automation, particularly optimized for distributed drive systems with fiber-optic cable connectivity and a push-pull power supply design. It supports PROFINET network integration and advanced Safety Integrated functions (STO, SS1, SLS, SSM, SDI), featuring 6 digital inputs (DI), 3 fail-safe digital inputs (F-DI), 2 digital outputs (DO), 1 fail-safe digital output (F-DO), 2 analog inputs (AI), and an HTL encoder interface. No SD/MMC or USB interfaces, unlike other CU240D-2 models. Protection degree IP65, operates without a power module. Packaging dimensions 135x175x242 mm, net weight 1.500 kg. Operating temperature 0 to +45°C (+32 to +113°F). Country of origin: Great Britain. This control unit is designed for use in conveyors, pumps, and fans in distributed systems, particularly in applications requiring fiber-optic communication, working in conjunction with SINAMICS G120D power modules.