PLCs, Power Supplies & Others

Core 8‑Channel Input Module for S5‑90U Systems

The Siemens 6ES5464-8MA21 is an 8‑channel analog input module for the SIMATIC S5‑90U programmable logic controller . This module provides a flexible analog interface for measuring resistance and voltage signals . It supports PT100 resistance sensors and ±1V/±10V voltage inputs, making it suitable for a wide range of industrial monitoring applications . Consequently, it is an essential component for connecting sensors like thermometers and pressure transducers to legacy S5‑90U systems .

Flexible Input Configuration and High Precision

This module is designed to be a low‑cost solution for analog inputs in the S5‑90U . It offers 8 independent channels that you can individually configure for current, voltage, or PT100 input using DIP switches . The 6ES5464-8MA21 provides a high 14‑bit resolution, ensuring accurate measurement across the module’s 0°C to 60°C operating temperature range . Furthermore, its input range includes 0‑20 mA, 4‑20 mA, 0‑10 V, ±10 V, and ±50 mV, providing exceptional versatility for a wide array of sensors . The module also offers optional galvanic isolation and active serial interface components for enhanced performance.

Technical Specifications

The following table details its key technical parameters .

Application in Legacy S5 Systems

Plant engineers use this module to maintain the analog capabilities of existing S5‑90U installations. The S5‑90U is a compact PLC, and this module is part of the system’s expansion capabilities . Therefore, sourcing tested units is essential for lifecycle management of classic Siemens automation platforms.

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