The Siemens 6ES5-405-7AB11 Input Module (also cataloged as 6ES5405-7AB11) is an 8-channel digital input card for the SIMATIC S5 family, designed to feed external signals into the PLC. It provides eight independent input channels that accept 115 V AC signals, commonly used for wiring industrial switches and sensors. Intended for use in an S5 rack, the module integrates with Siemens automation hardware to supply the CPU with reliable digital inputs.
