Siemens 6ES5 420-7LA11 Digital Input Module

Siemens 6ES5 420-7LA11 Digital Input Module is a 32-channel digital input card for the SIMATIC S5 backplane, belonging to the 6ES5 420 family. It provides 32 isolated 24 V DC digital input points (non-floating, F) for sensing binary signals from field devices, such as pushbuttons, limit switches, and proximity sensors. The module is designed to plug into an S5 rack and communicate with the central controller via the backplane, enabling straightforward integration of multiple 24 V inputs in legacy S5 installations. Typical applications include machine automation, control panels, and small-to-medium automation tasks where a compact 32-channel input solution is required for 24 V logic signals.