Siemens SIMATIC S7-1200 G2 Digital Input Module

Siemens SIMATIC S7-1200 G2 Digital Input Module About

The Siemens 6ES7221-1BH50-0XB0 is a next-generation SIMATIC S7-1200 G2 SM 1221 digital input module engineered for seamless I/O scalability in mid-range industrial automation. Acting as a high-density expansion module, it supplements the onboard capacities of a host S7-1200 G2 CPU by adding 16 digital inputs grouped in clusters of four channels.Operating on a nominal 24V DC field supply (with a permissible range of 0 to 30V DC), the module features fully flexible wiring topologies, cleanly supporting both sink and source (NPN/PNP) sensor configurations as verified on Automation24. Built to meet IEC 61131 Type 1 input criteria, it runs efficiently with a typical power loss of 3.2W while drawing its logic current directly from the backplane bus. The space-saving, 30mm-wide IP20 chassis mounts to standard 35mm DIN rails and utilizes front-panel LED indicators for immediate channel troubleshooting.