Siemens SIMATIC S7-300 Analog Input Module 6ES7 331-7KF02-0ABO

Description

The Siemens SM 331 (6ES7331-7KF02-0ABO) is a high-performance analog input module for the SIMATIC S7-300 PLC system. It provides 8 isolated analog inputs with a configurable resolution of up to 14 bits. This module is exceptionally versatile, capable of processing signals from various sensors including voltage, current, resistance thermometers (RTD), and thermocouples. Its robust design and diagnostic capabilities ensure high reliability and precise measurements in demanding industrial environments.

Specifications

• Manufacturer: Siemens
• Product Series: SIMATIC S7-300
• Model: SM 331 Analog Input
• Part Number: 6ES7 331-7KF02-0ABO
• Number of Analog Inputs: 8
• Isolation: Yes, galvanically isolated
• Resolution: 9, 12, or 14 bits (configurable)
• Input Signal Types: Voltage, Current, Resistance, Thermocouple
• Connector: Requires 1x 20-pole front connector

Label Info

• E-Stand: 2
• Serial Number: S C-R1D50196

Application

This module is ideal for applications requiring precise measurement of analog process variables such as temperature, pressure, flow, and level. It is commonly used in manufacturing, process control, and building automation systems integrated with the S7-300 platform.

Country of Origin

Made in Germany.

CO2 Impact

Opting for this pre-owned module instead of a new one prevents the emission of approximately 10.0 kg of CO2, contributing to a more sustainable industrial operation.

Availability

This is an obsolete item but is available from our stock. Order now from PLC2Day for expert support and fast delivery.

FAQ

What front connector is required for this S7-300 module?
This module requires a 20-pole front connector, Siemens part number 6ES7392-1AJ00-0AA0 (screw terminals) or 6ES7392-1BJ00-0AA0 (spring-loaded terminals).

Can this module measure both voltage and current signals simultaneously?
The channels can be configured independently for different measurement types like voltage, current, resistance, or thermocouples, offering high flexibility for mixed-signal applications. Configuration is typically done in channel groups.

Is this module compatible with a PROFIBUS DP remote I/O station like the ET 200M?
Absolutely. The SM 331 module (6ES7331-7KF02-0ABO) is designed to be used in a central S7-300 rack as well as in a decentralized ET 200M station connected via a PROFIBUS or PROFINET interface module.

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Last Update: Friday, March 13, 2026