Siemens 6ES5464-8MA21 SIMATIC S5 Analog Input Module

Siemens 6ES5464-8MA21 SIMATIC S5 Analog Input Module is a four-channel, galvanically isolated analog input card engineered for legacy S5 controllers and designed to integrate with S5-90U/95U/100U systems as well as ET 100U and ET 200U expansion units, enabling low-voltage measurement signals to be captured safely within the S5 bus and providing a straightforward way to extend analog sensing capabilities in aging automation installations. Each channel accepts signals in the ±50 mV range and uses built-in linearization to improve accuracy for small-signal sensors, delivering reliable low-level readings in industrial environments where sensor voltages are near the limits of their dynamic range. The module is identified by part number 6ES5464-8MA21 and belongs to the 464 analog input family, providing four isolated inputs that protect the controller from voltage transients and facilitate wiring to field sensors across ET backplanes and peripheral units, making it a practical retrofit option for upgrading legacy S5 lines without replacing the entire control system.