Siemens 6ES7131-4BD00-0AA0 4-Channel Digital Input Module for SIMATIC ET 200S

The Siemens 6ES7131-4BD00-0AA0 (6ES7131-4BD00-0AA0) is a digital input electronic module designed for the SIMATIC ET 200S distributed I/O system. Featuring four 24 V DC digital input channels in a compact 15 mm housing, this expansion module acquires binary signals from mechanical switches, proximity sensors, pushbuttons, and other standard input field devices. It integrates seamlessly into automated manufacturing lines, packaging machinery, assembly cells, and process control stations operating on PROFIBUS DP or PROFINET networks through compatible ET 200S interface modules. Engineered for dependable industrial service, the module mounts onto standard ET 200S terminal modules, simplifying cabinet wiring, commissioning, and hot-swapping during scheduled maintenance or repair workflows. The front panel features channel status LEDs that provide immediate visual feedback for diagnostic troubleshooting and field monitoring. Built to withstand standard factory environments, the unit operates reliably within standard control cabinet conditions while communicating process states back to centralized Siemens S7 controllers. Proper verification of part numbers and system configuration is recommended prior to replacement or installation.