Overview
Manuals
Principle
Alternative
Applications
Features:
- SIMATIC S7-400, analog input SM 431, non-isolated 16 AI
- Resolution 13 bit, +/-10V, +/-20 mA, 4 - 20 mA 20 ms conversion time
- 24 V DC; Only required for supplying 2-wire transmitters
The 6ES7431-0HH00-0AB0 is an analog input module designed specifically for SIMATIC S7-400 programmable logic controller (PLC) systems. Its primary function is to acquire and process analog signals from field instruments such as temperature transmitters, pressure sensors, flow meters, and other measuring devices. By converting these continuous electrical signals into digital values that the PLC can process, this module enables precise monitoring of industrial processes.
In industrial automation environments, the 6ES7431-0HH00-0AB0 supports multiple analog input channels and high-resolution signal conversion, thereby improving system accuracy and reliability. It enables control systems to acquire detailed process data and execute advanced control strategies such as closed-loop regulation, monitoring, and fault detection. This module is widely used in industries with extremely high requirements for measurement accuracy and data acquisition stability, such as power generation, chemical processing, manufacturing, and water treatment.
The 6ES7431-0HH00-0AB0 Siemens Analog Input Module may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7431-0HH00-0AB0 Analog Input Module datasheet(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
The 6ES7431-0HH00-0AB0 operates based on analog signal acquisition and analog-to-digital conversion. Input signals from field sensors are typically voltage or current signals (e.g., 0–10 V or 4–20 mA), which are first conditioned by filtering and signal scaling circuitry. The conditioned signal is then converted into digital data by a high-precision analog-to-digital converter (ADC). These digital values are transmitted to the CPU via the PLC backplane bus, where they are processed by the control program to support monitoring, regulation, and automation tasks.
Siemens has completed the following product milestones for this module:
Product Discontinuation: A discontinuation notice (PM400) was issued on October 1, 2025.
Recommended Alternative Products: Siemens recommends transitioning to newer PROFINET IO systems, such as the SIMATIC ET 200MP (for factory automation) or the SIMATIC ET 200SP HA (for process automation).
1. Process Measurement and Monitoring: Widely used in the chemical, oil and gas, and power generation industries to track variables such as pressure, temperature, flow rate, and level.
2. High-Density Signal Acquisition: Its 16-channel capacity makes it ideal for installations with limited rack space where multiple sensors need to be integrated into a single module.
3. Support for Two-Wire Transmitters: Typically used to power and read data from two-wire sensors (such as loop-powered pressure transmitters) directly from the module's 24V DC power supply.
