Siemens 6ES72211BF220XA0 Digital Input Module

Siemens 6ES72211BF220XA0 is an eight-channel digital input module (EM 221) for the SIMATIC S7-200 family, adding 8 x 24 V DC inputs to S7-22X CPUs. It accepts standard 24 V DC logic signals from field devices such as pushbuttons, limit switches, and proximity sensors, providing reliable on/off state information to the controller for sequencing, safety interlocks, and process monitoring. This spare part is designed specifically for S7-22X CPUs, ensuring compatibility with the timing and signaling conventions of the S7-200 I/O system. With eight input channels, it expands the input capacity of compact automation setups while maintaining the same electrical characteristics as other EM 221 modules. Applications include small to mid-size machines and packaging lines where 24 V DC digital inputs are used to detect user inputs, limit positions, and sensor states, enabling straightforward integration into existing S7-200 control architectures. The 6ES72211BF220XA0 part number identifies the EM 221 digital input module in the S7-200 ecosystem, allowing technicians to source genuine Siemens replacement parts for maintenance or system expansion.