Siemens 6ES5 421-8MA12 Simatic S5 Digital Input Module

The Siemens 6ES5 421-8MA12 is a digital input module designed for the SIMATIC S5 automation system. It provides 16 digital input channels capable of receiving signals at 24 V DC. This module is used to interface field devices such as switches, sensors, and pushbuttons to the PLC, enabling the processor to read digital signals from the industrial environment.