Siemens 6ES5431-7LA11 is a 16-channel digital input module (DI) for SIMATIC systems with a 24/48 V input range (24/48 V UC). It is listed in Siemens documentation as a 16-channel DI block in the 431 family and is used with interface module adapters for compatibility with S7-300/400 configurations. This module reads on/off signals from field devices such as sensors and switches in industrial environments and supports voltage‑compatible I/O expansion in retrofit or migration projects. The part number 6ES5431-7LA11 uniquely identifies this 16DI block within Siemens’ legacy I/O family.
