Siemens 6ES7131-4BF00-0AA0 is an ET 200S digital input module that provides eight 24 V DC input channels for distributed automation I/O. As a member of the ET 200S family, it reads binary field signals from sensors, switches, and other 24 V DC devices and communicates those states to a Siemens PLC via the system backplane. This 8DI DC24V module is designed to expand a control system’s input capability in modular, scalable automation architectures, enabling reliable digital input handling across industrial applications.
