Siemens 6ES5430-4UA11 is a 32-channel digital input module for the SIMATIC S5 430-series controllers, compatible with S5-135U and S5-155U backplanes. It provides 32 24 V DC digital inputs with floating (galvanically isolated) channels, packaged in the compact Version U form factor. This module is used to convert external sensors and switches into PLC-ready discrete signals, expanding the input capacity of the S5 system while maintaining electrical isolation from the rest of the control circuit.
